Progress in Energy and Combustion Science最新文献

{"title":"Progress in multi-scale modeling of soot particle aggregation in laminar sooting flames","authors":"Fengshan Liu ,&nbsp;Jérôme Yon ,&nbsp;José Morán ,&nbsp;Georgios Kelesidis ,&nbsp;Felipe Escudero ,&nbsp;Andrés Fuentes","doi":"10.1016/j.pecs.2025.101234","DOIUrl":"10.1016/j.pecs.2025.101234","url":null,"abstract":"<div><div>The toxicity, climate impact, as well as the physical and chemical properties of ultra-fine soot particles emitted from combustion systems are strongly dependent on their size and morphology. Research attention has been paid in the last three decades to developing more accurate and capable methods to model soot particle coagulation in the presence of inception, surface growth, and oxidation, to predict particle size distribution as well as the detailed aggregate morphology of soot. While soot particle concentrations in hydrocarbon flames are primarily governed by soot kinetics, the morphology of soot particles is controlled by both soot kinetics and particle dynamics. Flame-generated soot particles are fractal aggregates formed by polydisperse and nearly spherical primary particles with a certain degree of overlapping. The properties of fractal aggregates, nanoparticle coagulation, and soot formation chemistry all play important roles in soot formation. This article reviews all these aspects but the focus is on recent progress in macro- and meso-scale modeling of soot particle aggregation in laminar sooting flames to avoid the complexities of turbulence. The reviewed macro-scale methods based on the population balance equation include the commonly used sectional methods and methods of moments. The main features of three recently developed state-of-the-art meso-scale methods, namely the event-driven Discrete Element Method, Monte Carlo Aggregation Code, and detailed stochastic population balance model are reviewed. To highlight the complexities of modeling the particle size distribution and detailed particle morphology without and with surface growth, numerical simulations of three test cases were conducted using the event-driven Discrete Element Method, the Monte Carlo Aggregation Code, and the two macro-scale methods. A detailed analysis of the results was presented to understand how different treatments of particle coagulation and surface growth in the two meso-scale methods affect the predicted particle size and morphology. The remaining challenges in modeling detailed soot particle morphology are outlined.</div></div>","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"110 ","pages":"Article 101234"},"PeriodicalIF":32.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144262261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Techniques for measuring flare combustion efficiency and destruction removal efficiency: A review","authors":"Kyle J. Daun ,&nbsp;Jennifer P. Spinti","doi":"10.1016/j.pecs.2025.101235","DOIUrl":"10.1016/j.pecs.2025.101235","url":null,"abstract":"<div><div>Growing awareness of the environmental and health impacts of unburned and partially pyrolyzed hydrocarbons emitted by flaring establishes a need for instrumentation that can quantify the performance of flares in terms of overall combustion efficiency (CE) as well as the destruction removal efficiency (DRE) of a particular species. Climate modelers and policymakers need CE estimates to calculate the overall contribution of flaring to global methane inventories, so they may understand how flare emissions impact climate change and develop science-informed regulations; regulators need tools for enforcing current and emerging rules governing flare DRE; flare operators need instrumentation to identify problematic operating conditions in real time; and combustion equipment manufacturers need to quantify improvements in CE/DRE realized through new flare tip designs.</div><div>This paper reviews the current state-of-the-art in instrumentation and techniques used for quantifying CE and DRE, with a focus on flaring in the oil and gas sector. The paper begins with an overview of flaring, followed by a discussion of the aspects of flaring that make this measurement so difficult to carry out. Techniques for measuring flare CE and DRE are then examined. The paper concludes with an outlook of future challenges and opportunities.</div></div>","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"110 ","pages":"Article 101235"},"PeriodicalIF":32.0,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Future of internal combustion engines using sustainable, scalable, and storable E-fuels and biofuels for decarbonizing transport and enabling advanced combustion technologies","authors":"Avinash Kumar Agarwal ,&nbsp;Christine Mounaïm-Rousselle ,&nbsp;Pierre Brequigny ,&nbsp;Atul Dhar ,&nbsp;Camille Hespel ,&nbsp;Chetankumar Patel ,&nbsp;Dhananjay Kumar Srivastava ,&nbsp;Ganesh Duraisamy ,&nbsp;Luis Le Moyne ,&nbsp;Nikhil Sharma ,&nbsp;Nitin Labhasetwar ,&nbsp;Paramvir Singh ,&nbsp;Piyali Das ,&nbsp;Pradipta Kumar Panigrahi ,&nbsp;Pravesh Chandra Shukla ,&nbsp;P. Sakthivel ,&nbsp;S.Venkata Mohan ,&nbsp;Snehasish Panigrahy ,&nbsp;Swarnendu Sen ,&nbsp;Hardikk Valera","doi":"10.1016/j.pecs.2025.101236","DOIUrl":"10.1016/j.pecs.2025.101236","url":null,"abstract":"<div><div>Internal combustion (IC) engines have contributed to global economic development in industrialized societies. Hydrocarbon fuels used for fueling the IC engines need to be replaced by sustainable and eco-friendly origins that do not adversely impact the environment locally and globally. Electro-fuels (or E-fuels) and biofuels are essential to displace fossil fuels. They are primarily produced using renewable electricity and feedstocks, respectively, and represent an emerging class of carbon-neutral drop-in fuels for the transport sector, which are becoming increasingly important with every passing day globally and have an essential role in the ‘net-zero’ future. This paper comprehensively reviews the advancements in IC engines to become more efficient in taking the fuel property advantages of various E-fuels and biofuels in existing engines. The paper focuses on several fuels, among the most studied ones in the open literature in the last decade, since their adoption might depend on factors such as the local economic considerations, cultural contexts and the application itself, storability, power requirement, and government policies. The paper covers these fuels by briefly introducing their production pathways and properties. It then focuses on their engine use to meet the future tailpipe and greenhouse gas emissions norms. Challenges regarding the modelling of engines powered by E- or bio-fuels are also included. E-fuels offer a straightforward advantage even in engine-out emissions and after-exhaust emission control technologies. It represents an opportunity to limit GHG emissions. Moreover, the E−(or Bio-) fuels powered engines can cover the same operating range (or a larger one) with similar efficiency or greater than hydrocarbon fuels. However, using these fuels still remain challenging. Retrofitting existing engines for using E−(or Bio-) fuels depends on the cost of the fuel injection system for injecting the fuel into the combustion chamber. The transition from fossil fuels can be done using liquid fuels such as methanol, ethanol, etc., by blending them with conventional fuels. In the long run, methanol, hydrogen, and ammonia are expected to significantly decarbonize the transport sector globally.</div></div>","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"110 ","pages":"Article 101236"},"PeriodicalIF":32.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental research on the countercurrent fixed-bed combustion of biomass","authors":"Handel A. Martinez–Sarache ,&nbsp;Vitor C. Simões ,&nbsp;João A.F. Altoé ,&nbsp;Juan Jesús Rico ,&nbsp;David Patiño ,&nbsp;Waldir A. Bizzo","doi":"10.1016/j.pecs.2025.101233","DOIUrl":"10.1016/j.pecs.2025.101233","url":null,"abstract":"<div><div>Fixed-bed combustion is the oldest and most flexible method for generating heat from solid fuels with diverse morphological characteristics. This approach consolidates countercurrent fixed-bed burners as the most employed technique for biomass combustion in small- and medium-scale installations. In recent decades, researchers worldwide have generated significant experimental evidence to decipher the complex mechanisms behind reaction front propagation using laboratory-scale burners, which simulate the conditions of fuel in industrial plants. Many experimental results are available in the scientific literature, and the consolidation and discussion of the most relevant data can be useful for better understanding the current state of the art and identifying knowledge gaps on the subject. This paper presents a systematic review of the available literature concerning experimental studies of biomass fixed-bed combustion in laboratory-scale reactors. The central discussion encompasses the definition of the parameters employed to characterize the reaction zone behaviour and their dependence on fuel properties and primary air conditions. The insights gained in this review were addressed to propose criteria for harnessing the abundant availability of agricultural residues as alternative fuels in grate-firing systems.</div></div>","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"109 ","pages":"Article 101233"},"PeriodicalIF":32.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The inverse jet diffusion flames: A systematic review","authors":"Vishnu Hariharan ,&nbsp;Mahesh S ,&nbsp;Debi Prasad Mishra","doi":"10.1016/j.pecs.2025.101218","DOIUrl":"10.1016/j.pecs.2025.101218","url":null,"abstract":"<div><div>The gaseous Inverse Jet Diffusion Flame (IJDF) is a unique nonpremixed flame that can be established in a simple coaxial burner when central air jet surrounded by annular fuel jet is ignited. The active research on laminar IJDF was initiated in the early 1980's, with a primary focus on its sooting characteristics. The soot formation, evolution and morphology in inverse jet diffusion flame differ fundamentally from that of the normal jet diffusion flame (NJDF) due to its distinct reactant delivery mode and fluid dynamics. The unique feature of the IJDF configuration is its reduced soot formation as compared to the NJDF configuration, particularly at higher air-fuel velocity ratio, even for hydrocarbon fuels. The literature has reported six types of laminar IJDF based on visual appearance and air-fuel velocity ratio. Furthermore, laminar IJDF is mainly utilized as a lab-scale flame by various researchers for the fundamental investigation of soot evolution in nonpremixed flames. Unlike normal jet diffusion flame, which is established with the fuel jet enveloped by an oxidizer jet, the post-flame emissions and the flame stability aspects of turbulent IJDF are relatively less understood. From a global perspective, coherence in the research on inverse jet diffusion flame is lacking and there is a need for an extensive investigation to understand this special type of nonpremixed flame. The present review identifies different emerging areas related to IJDF that the combustion researchers can pursue in the future.</div><div>Various aspects of laminar and turbulent IJDF, such as flame structure, soot formation, flame height, flame stability, thermal and emission characteristics are discussed in this review. This review may serve as a reference that contributes to the research perspectives on laminar and turbulent inverse jet diffusion flames for adapting the favourable aspects of this flame configuration in a wide range of industrial and domestic applications.</div></div>","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"109 ","pages":"Article 101218"},"PeriodicalIF":32.0,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of organic pollutants in coal combustion processes and control technologies","authors":"Jun Liu ,&nbsp;Tao Wang ,&nbsp;Longchun Zhong ,&nbsp;Mohamed A. Serageldin ,&nbsp;Wei-Ping Pan","doi":"10.1016/j.pecs.2025.101231","DOIUrl":"10.1016/j.pecs.2025.101231","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Organic pollutants are acknowledged as one of the primary environmental hazards in the atmosphere, posing a significant threat to human health and the environment. This work provides a critical review of the recent research on organic pollutants from stationary coal-burning sources, including an overview of the effect of coal composition and coal source, the types of organics material in coal, the generation of organic pollutants during coal combustion, emission of organic pollutants, co-removal by air pollution control devices (APCDs), and the technologies used to remove organic pollutants from coal-fired power plants (CFPPs). Field sampling and analysis showed that the organic pollutants produced from coal combustion processes are mainly composed of volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), and organic components in condensable particulate matter (CPM). The VOCs and CPM are mainly discharged into the atmosphere as part of the gas and particulate phases, respectively, whereas, PAHs are mainly concentrated in fly ash and bottom ash. The generation of organic pollutants during coal combustion is mainly affected by coal grade, temperature, heating rate, residence time, and pressure. Considering that the flue gas temperature and composition can vary from one CFPP location to another, the choice of the sampling methods is based on the specific needs of a CFPP. Because, the selection of a sampling method can significantly affect the final results and should be given special attention. Typical sampling methods for VOCs, PAHs, and CPM are summarized and their advantages and disadvantages are compared. The adsorption tube sampling method is more suitable for the sampling of VOCs because it is not limited by the volume and miscellaneous components of the flue gas. EPA Method 0010 and the dry impactor condensation method (EPA Method 202) are more suitable for sampling PAHs and CPM in flue gas due to their higher accuracy. The APCDs in CFPPs have organic pollutants co-removal abilities besides those for conventional pollutants. As a result, they can remove VOCs, PAHs, and CPM at efficiencies of 55.8–87.6 %, 74.7–89.8 %, and 36.3–81.5 %, respectively, with corresponding emission concentrations of 0.058–16.29 mg/m&lt;sup&gt;3&lt;/sup&gt;, 0.42–43.3 μg/m&lt;sup&gt;3&lt;/sup&gt;, and 5.9–65.1 mg/m&lt;sup&gt;3&lt;/sup&gt;. Based on current publicly reported data, the VOCs, PAHs and CPM contents emitted by global coal-fired power plants are estimated to be 88.1 Gg, 6.76 Gg (2.22 Gg in flue gas and 4.54 Gg in fly ash), and 600 Gg (organic components: 328 Gg, inorganic components: 272 Gg), respectively. Among the many removal technologies reviewed: include improved selective catalytic reduction (SCR) catalysts; and an advanced oxidation process (AOP) combined with an SCR or with a wet flue gas desulphurization (WFGD) unit respectively are two potentially useful technologies for future use in CFPPs. The information collected and presented in this review will","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"109 ","pages":"Article 101231"},"PeriodicalIF":32.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ammonia combustion in fixed-bed and fluidised-bed reactors: The concept, knowledge base, and challenges","authors":"Samuel Ronald Holden ,&nbsp;Zhezi Zhang ,&nbsp;Junzi Wu ,&nbsp;Dongke Zhang","doi":"10.1016/j.pecs.2025.101230","DOIUrl":"10.1016/j.pecs.2025.101230","url":null,"abstract":"<div><div>In considering ammonia (NH₃) as a carbon-free fuel for large-scale power generation, this review examines the current state of knowledge of NH₃ as a fuel in terms of its thermophysical properties and burning characteristics compared to conventional hydrocarbon fuels. The proceeding analysis portrays the challenges associated with NH₃ combustion in traditional systems and suggests fluidised-bed NH₃ combustion as a plausible means to provide reliable ignition, stable combustion, and reduced NOx emission. A fixed-bed is considered as a research tool, as well as a special case of fluidised-bed, to study NH₃ oxidation and combustion in the presence of solid bed material to provide foundational information key to understanding the more complicated fluidised-bed NH₃ combustion. The thermophysical properties and burning characteristics of NH₃, along with an examination of the combustion of other fuels in the presence of solid media, enable expectations for NH₃ combustion in fixed- and fluidised-beds. A general fluidised-bed NH₃ combustion system design, along with suggested operating conditions, is presented to provide an appreciation for a practical large-scale fluidised-bed NH₃ fired power generation system. The NH₃ combustion chemistry and associated NOx formation and destruction pathways are also discussed to appreciate the impact of operating conditions on combustion performance. Finally, the review identifies key knowledge gaps and technical challenges which warrant further research to advance fluidised-bed NH₃ combustion technology for large-scale electric power generation in a carbon constrained future.</div></div>","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"109 ","pages":"Article 101230"},"PeriodicalIF":32.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CFD-DEM modelling of dense gas-solid reacting flow: Recent advances and challenges","authors":"Shuai Wang,&nbsp;Yansong Shen","doi":"10.1016/j.pecs.2025.101221","DOIUrl":"10.1016/j.pecs.2025.101221","url":null,"abstract":"<div><div>Dense gas-solid reacting flow involves multiphase flow, heat and mass transfer, and chemical reactions. The computational fluid dynamics-discrete element method (CFD-DEM) has emerged as a promising tool for investigating and optimizing dense gas-solid reacting systems at the particle scale. Despite the rapid advancement of CFD-DEM and its successful application to various chemical engineering processes, there is still a lack of a comprehensive review of the theory and applications of CFD-DEM modelling of dense gas-solid reacting flow. This article aims to bridge this gap by providing a systematic review of recent progress in the development of CFD-DEM models and their applications to dense gas-solid reacting systems. This article begins by providing a comprehensive review of sub-models used to describe flow dynamics and thermochemical conversion in dense gas-solid reacting systems. The numerical algorithms and implementations, ranging from flow to heat and mass transfer, as well as speed-up methods, are examined in detail. The focus then shifts to the recent advancements of CFD-DEM applications in chemical engineering processes related to dense gas-solid reacting systems. Specific areas of interest include the thermochemical conversion of biomass and coal, blast furnace ironmaking, chemical looping combustion, solid waste incineration, lime shaft kiln calcination, and more. Furthermore, the challenges associated with effectively and efficiently modelling dense gas-solid reacting flow, particularly about the multi-physics and multi-scale characteristics in both time and space, are thoroughly assessed. By addressing these challenges, this review is expected to foster further progress in the field and enhance our understanding and control of dense gas-solid reacting systems in various applications.</div></div>","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"109 ","pages":"Article 101221"},"PeriodicalIF":32.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comprehensive review on flash point behavior of binary ignitable mixtures: Trends, influencing factors, safety and fuel design implications, and future directions","authors":"Kazem Lakzian ,&nbsp;Horng-Jang Liaw ,&nbsp;Esmail Lakzian ,&nbsp;Vincent Gerbaud","doi":"10.1016/j.pecs.2025.101222","DOIUrl":"10.1016/j.pecs.2025.101222","url":null,"abstract":"<div><div>The flash point (FP) behavior of binary ignitable mixtures, which are the simplest form of mixtures and fundamental building blocks, is essential for understanding multicomponent mixture behavior. This knowledge plays a vital role in process and chemical safety as well as in fuel design. In the present review, the FP of 245 independent binary ignitable mixtures, composed of 102 individual pure compounds derived from 69 published articles, was investigated. The mixtures based on their chemical class were categorized. Investigations on their ideal or extreme FP behaviors revealed that certain combinations have a higher potential for demonstrating extreme FP behaviors such as alcohol + aromatic hydrocarbon, alcohol + ester, alcohol + alkane, aromatic hydrocarbon + organic acid, alcohol + organic acid, phenol + alcohol, phenol + ketone, and phenol + pyridine. It was found that the occurrence of extreme FP behaviors is not only related to the chemical class but also to the molecular structure, the non-ideality of binary mixture, and the temperature gap between FP values of the pure constituents in each binary blend. These findings can be utilized to enhance the safety level of processes or operations involving these binary mixtures. Furthermore, this information can be valuable in fuel design for specific purposes and improve combustion, thanks to a comprehensive knowledge regarding the FP tendencies of each binary category and the potential for extreme FP behaviors.</div></div>","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"108 ","pages":"Article 101222"},"PeriodicalIF":32.0,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"End-gas autoignition and detonation in confined space","authors":"Lei Zhou ,&nbsp;Xiaojun Zhang ,&nbsp;Kai H. Luo ,&nbsp;Haiqiao Wei","doi":"10.1016/j.pecs.2025.101217","DOIUrl":"10.1016/j.pecs.2025.101217","url":null,"abstract":"&lt;div&gt;&lt;div&gt;End-gas autoignition, especially with detonation development in a confined space, is a complex physical phenomenon, including premixed flame dynamics, fluid dynamics, autoignition chemistry etc., which is generally considered as the origin of knock and super-knock in internal combustion (IC) engines. Furthermore, the mechanism for detonation initiation is also related to fire safety and industrial disasters. Thus, this review focuses on the recent progress made in the fundamental understanding of the mechanisms of end-gas autoignition phenomena along with detonation combustion in confined spaces through theoretical analyses, optical diagnostics, and high-resolution numerical simulations, with emphasis on the effects of crucial physicochemical factors on the two stages of end-gas autoignition, namely autoignition occurrence and autoignition propagation. Firstly, two basic theories, namely Livengood–Wu (L–W) integral and the reactivity gradient theory, which provide theoretical foundations for understanding autoignition occurrence and autoignition propagation, respectively, are demonstrated. Specially, applications and limitations of L-W integral and the extension of Bradley's diagram to multi-dimensional conditions closer to actual circumstances are elaborated. Then, a comprehensive investigation of several pivotal physicochemical factors involved in end-gas autoignition and detonation development in confined spaces, are conducted, including flame propagation, pressure wave, inhomogeneity, turbulence, chemical reactivity and thermodynamic conditions. The results indicate that, three essential elements are included in end-gas autoignition, namely flame, pressure wave, and autoignition. The flame-pressure interaction induced end-gas autoignition and detonation can be divided into three processes: I-reactivity increase, II-critical and sensitive state, and III-coupling and detonation. The first two processes account for autoignition occurrence and the third accounts for autoignition propagation. As to autoignition occurrence, increasing turbulence flame speed can inhibit end-gas autoignition under weak pressure wave conditions, whereas it can promote end-gas autoignition under strong pressure wave conditions. As to autoignition propagation, various combustion modes can originate from a reactivity gradient induced by temperature, composition, additive, as well as a cold spot within negative temperature coefficient (NTC) region, while the existence of low-temperature chemistry (LTC) and multi-stage ignition complicates autoignition propagation. The results further indicate that an inhomogeneous field with a small characteristic length scale, and an inhomogeneous field with a large characteristic length scale but coupled with the turbulence with a small characteristic length scale and a sufficiently large turbulent velocity fluctuation, can both weaken detonation propensity. Furthermore, the fuel type, diluent gas, and thermodynamic conditions","PeriodicalId":410,"journal":{"name":"Progress in Energy and Combustion Science","volume":"108 ","pages":"Article 101217"},"PeriodicalIF":32.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}