International Journal of Engine Research最新文献_第4页

Development and experimental validation of a novel twin injector concept for a biogas diesel RCCI engine 为生物气柴油 RCCI 发动机开发新型双喷射器概念并进行实验验证

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-25 DOI: 10.1177/14680874241264337

Gopa Kumar Sukumaran Nair, Akhil Balakrishnan, Asvathanarayanan Ramesh

{"title":"Development and experimental validation of a novel twin injector concept for a biogas diesel RCCI engine","authors":"Gopa Kumar Sukumaran Nair, Akhil Balakrishnan, Asvathanarayanan Ramesh","doi":"10.1177/14680874241264337","DOIUrl":"https://doi.org/10.1177/14680874241264337","url":null,"abstract":"A bi-fuel RCCI engine that uses a low reactivity renewable fuel like biogas along with diesel can decrease the NOx emissions and at the same time operate with high efficiency. Generally, diesel is injected in pulses, one very early and the other close to TDC. The early injection if done with conventional wide angle diesel injectors leads to wall wetting resulting in high THC, CO and adversely affects the efficiency. In this work a combination of injectors, one with a narrow angle between the sprays and the other with a wide angle between the sprays (NW Injectors) was evaluated for early and near TDC injections respectively in a biogas diesel RCCI engine. Simulations with a validated CFD model were used to determine the suitable injection parameters including the orientation of the spray holes, number of holes of the Narrow angle Injector (NI), fuel split ratio between narrow and wide injectors, injection timing and injection pressure. The studies indicated that the NI sprays have to hit the periphery of the piston bowl for good mixture preparation. The 3-hole NI configuration with the sprays aimed at the periphery of the piston bowl resulted in minimum fuel deposition, highest efficiency, and lowest soot and HC emissions. The NI was subsequently manufactured, installed on the engine and experiments were conducted in the biogas diesel NW RCCI mode for determining the performance and emissions and for comparing the same with the single Wide angle Injector RCCI (WI RCCI) mode in order to bring out its potential.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"7 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spray characteristics of elliptical orifice spray in diesel engine under air movement conditions 空气流动条件下柴油发动机中椭圆孔喷雾的喷雾特性

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-25 DOI: 10.1177/14680874241261114

Hekun Jia, Xiangyu Cao, Bifeng Yin, Zhuangbang Wei

{"title":"Spray characteristics of elliptical orifice spray in diesel engine under air movement conditions","authors":"Hekun Jia, Xiangyu Cao, Bifeng Yin, Zhuangbang Wei","doi":"10.1177/14680874241261114","DOIUrl":"https://doi.org/10.1177/14680874241261114","url":null,"abstract":"The development of high-quality mixture is a critical requirement for achieving high-efficiency and low-emission diesel engines, and fuel injection system performance improvement and in-cylinder airflow organization are crucial ways for achieving high-quality mixture. The elliptical nozzle is used as the research object in this research, and numerical simulation is utilized to investigate the effect of different airflow speeds and directions on the atomization characteristics of the elliptical nozzle jet, in order to provide a theoretical basis for the engineering application of the elliptical nozzle in diesel engines. The results show that under the same airflow conditions, the vertical penetration distance of the spray decreases while the horizontal penetration distance increases with the use of elliptical orifices, the surface wave perturbation on the windward side is more violent, and reduce spray field the Sauter Mean Diameter (SMD). The spray projected area grew by 13.5%, the spray SMD dropped by 14.8%, and the vertical penetration distance of the spray with elliptical orifices fell by 18% with an increase in airflow velocity from 0 to 20 m/s. When the airflow direction and the spray direction were at a 90° angle and the SMD was lower than that of the circular orifice by 12.9%. The angle between the airflow direction and the short axis of the elliptical orifice was 30°when the spray projection area was larger, the perturbation of the spray body was more intense, and the surface wave amplitude was larger.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"7 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of spray-to-spray interaction after wall impingement of spray flames on diesel combustion characteristics 喷射火焰撞击墙壁后喷射与喷射之间的相互作用对柴油燃烧特性的影响

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-25 DOI: 10.1177/14680874241260363

Hideyuki Ogawa, Tomoki Ishikawa, Yoshimitsu Kobashi, Gen Shibata

{"title":"Influence of spray-to-spray interaction after wall impingement of spray flames on diesel combustion characteristics","authors":"Hideyuki Ogawa, Tomoki Ishikawa, Yoshimitsu Kobashi, Gen Shibata","doi":"10.1177/14680874241260363","DOIUrl":"https://doi.org/10.1177/14680874241260363","url":null,"abstract":"The influence of spray-to-spray interaction after wall impingement of spray flames on the combustion characteristics in high pressure and high temperature ambient gas like in combustion chambers of diesel engines was examined with a constant volume vessel. Fuel was injected onto a flat wall from two nozzles to form two parallel, adjacent sprays in the vessel, causing the spray-to-spray interaction after the wall impingement. The combustion was analyzed with the rate of heat release calculated from the pressure transition in the vessel and the spray flame was visualized by high-speed video. The 310 nm UV light images of the chemiluminescence from OH radicals are recorded to demonstrate the reaction activity in the spray flame. The images of transmitted light throughout the constant volume vessel were recorded to visualize the soot formation and oxidation processes as well as to quantify the soot concentrations as the KL factors. The results showed that the rate of heat release from the main combustion decreases and the afterburning increases with the spray-to-spray interaction after the wall impingement of the spray flame. Combustion suppression with the spray-to-spray interaction occurred in all the conditions of the experiments here when changing the distance from the nozzle to the impinging wall between 25 and 40 mm and the fuel injection pressures between 100 and 200 MPa. Inside the spray-to-spray interaction zone, the chemiluminescence from OH radicals is weaker, supporting the inactive combustion due to difficulties of the air entrainment, and the lower transmitted light intensities with larger KL factors, indicating higher soot concentrations. The spray-to-spray interaction zone on the impingement wall advances toward the inside of the vessel between the sprays and it moves away from the wall, entraining the unutilized air and causing a relatively active combustion as well as rapid soot oxidation during the late afterburning stage.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"424 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on partial oxidation phenomena of post-injection fuel in diesel engines 柴油发动机后喷射燃料部分氧化现象研究

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-25 DOI: 10.1177/14680874241263193

Gen Shibata, Kensei Karumai, Suzune Sakai, Hideyuki Ogawa

{"title":"Study on partial oxidation phenomena of post-injection fuel in diesel engines","authors":"Gen Shibata, Kensei Karumai, Suzune Sakai, Hideyuki Ogawa","doi":"10.1177/14680874241263193","DOIUrl":"https://doi.org/10.1177/14680874241263193","url":null,"abstract":"In diesel engines, post fuel is injected in the expansion stroke, oxidized by the diesel oxidation catalysts and the high temperature gas re-generates the diesel particulate filters. However, it is empirically known that the post fuel at advanced injection timing is partially oxidized in the cylinder due to the high temperature-pressure conditions and it is a cause of the reduction of fuel consumption. The purpose of this research is to analyze post-injection fuel behaviors in cylinder and investigate the optimum fuel injections that maximize the unburnt hydrocarbons to the diesel oxidation catalysts. The engine employed in this research is a turbo charged 2.0 L four-cylinder DI diesel engine with two fuel injection systems to change the heterogeneity of air-fuel mixture and temperature distributions in cylinder; n-hexane is injected in the intake manifold to produce the homogeneous air-fuel mixture and diesel fuel is directly injected into the cylinder. The partial oxidation ratio of post fuel and the fuel loss mainly by fuel adhesion was calculated by injected fuel quantity, air quantity, and emission data. The 3D-CFD software was introduced to analyze the partial oxidation of post fuel and flow in the cylinder. The heterogeneity of burned gas mixture of post injection atmosphere and the post-injection timings were the parameters of engine tests and 3D-CFD simulations. The results suggest that the heterogeneity of equivalence ratio and the non-uniformity of gas temperature inside the cylinder at the start of post injection affect the partial oxidation of post-injection fuel. The more homogeneous these conditions are, the better the suppression of partial oxidation of post-injection fuel and the avoidance of fuel adhesion to the cylinder wall can be achieved.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"64 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of dual injection operations on combustion performances and particulate matter emissions in a spark ignition engine fuelled with second-generation biogasoline 双喷射操作对以第二代生物汽油为燃料的火花点火发动机的燃烧性能和颗粒物排放的影响

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-24 DOI: 10.1177/14680874241261128

Mohamed Mohamed, Xinyan Wang, Hua Zhao, Jonathan Hall

{"title":"Effects of dual injection operations on combustion performances and particulate matter emissions in a spark ignition engine fuelled with second-generation biogasoline","authors":"Mohamed Mohamed, Xinyan Wang, Hua Zhao, Jonathan Hall","doi":"10.1177/14680874241261128","DOIUrl":"https://doi.org/10.1177/14680874241261128","url":null,"abstract":"The automotive industry must mitigate climate change by reducing vehicle carbon emissions and promoting sustainable transportation through technical solutions and innovations. Biofuels are seen as a solution to reduce CO2 emissions, but they may affect fuel performance and emissions. Second-generation biogasoline mixed with ethanol has proven that it can be introduced as a drop-in fuel with the same performance and tailpipe emissions at the same level as fossil fuels. However, particulate matter (PM) emissions are significantly higher than fossil fuels. This study aims to experimentally investigate the effect of port and direct fuel injections on the PM emissions in a boosted spark ignition (SI) engine fuelled by Euro 6 standard biofuel with a 99 octane number blended with 20% ethanol compared to a fossil fuel baseline. The single-cylinder SI engine was equipped with two fuel injectors, a direct injector and a port fuel injector, and operated with externally boosted air. The split injection ratio was adjusted from 100% direct injection (DI) to 100% port fuel injection (PFI) to investigate the combustion characteristics and particulate emissions (PM) at different engine loads and speeds. The results indicate that by changing 100% DI to 80% PFI, PM emissions numbers between particle sizes of 23 and 1000 nm were dropped by 96.56% at a low load operation of 4.6 bar IMEP for the 99 RON E20 biogasoline and by 84% for the 95 RON E10 fossil fuel while maintaining the same indicated thermal efficiency and a similar level of other emissions. However, at a higher load above 10 bar IMEP, it was found that full DI operation reduced particulate numbers (PN) by 64% and 38% for 99 RON E20 biogasoline and 95 RON E10 fossil fuel at 20 bar IMEP, respectively, and enabled more stable operation at 3000 rpm with higher load operation regions.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"35 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toward improving efficiency and mitigating emissions in a natural gas/diesel direct injection dual fuel engine using EGR 利用 EGR 提高天然气/柴油直喷双燃料发动机的效率并减少排放

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-24 DOI: 10.1177/14680874241261003

Youcef Sehili, Lyes Tarabet, Mahfoudh Cerdoun, Khaled Loubar, Clément Lacroix

{"title":"Toward improving efficiency and mitigating emissions in a natural gas/diesel direct injection dual fuel engine using EGR","authors":"Youcef Sehili, Lyes Tarabet, Mahfoudh Cerdoun, Khaled Loubar, Clément Lacroix","doi":"10.1177/14680874241261003","DOIUrl":"https://doi.org/10.1177/14680874241261003","url":null,"abstract":"As emissions regulations become more and more stringent and conventional fuel sources rarefaction, new alternatives are emerging to address this situation. Dual fuel engines are among the promising solutions, offering both ecological and economic advantages. However, these engines often confront constraints linked to high levels of unburnt hydrocarbons (HC) at low loads and NOx emissions at high loads. To overcome these problems and guarantee high-efficiency overall operating loads, exhaust gas recirculation (EGR) is a potential solution. In the present experimental study, appropriate modifications have been carried out to a single-cylinder diesel engine to ensure dual fuel operation with EGR. Natural gas and diesel are used as the primary and pilot fuel, respectively. At low load operations, the EGR rate is increased up to 35% until the reduction of unburnt hydrocarbons. However, at high loads, the EGR rate is carefully adjusted, as the combustion efficiency easily deteriorates due to oxygen amount lack in the combustion chamber. Also, minimizing NOx emissions is prioritized in all load conditions while keeping thermal efficiency in sight. In addition, the variation in the amount of pilot fuel is studied for improving the combination of dual fuel engine operation with the EGR technique. This made it possible to determine the influence of load, EGR rate, and pilot fuel quantity on the engine in response to the triple challenges of reducing NOx and HC and improving thermal efficiency. The results show that an adequate EGR rate of 30%, depending on the operating conditions, can reduce HC emissions by >25% while increasing thermal efficiency by around 20%. This result is accompanied by a significant reduction, over 90%, in NOx emissions.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multi-layer membrane filter made of potassium catalyst and three-way catalyst for a passive after-treatment system 用于被动后处理系统的由钾催化剂和三元催化剂制成的多层膜过滤器

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-24 DOI: 10.1177/14680874241261106

Teerapat Suteerapongpun, Masaru Ogura, Katsunori Hanamura

引用次数: 0

SCR + ASC systems control by backward induction with adaptive grid and different disturbance scenarios 通过自适应电网和不同干扰情况下的后向感应控制 SCR + ASC 系统

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-24 DOI: 10.1177/14680874241261101

Benjamín Pla, Pedro Piqueras, Pau Bares, André Nakaema Aronis

{"title":"SCR + ASC systems control by backward induction with adaptive grid and different disturbance scenarios","authors":"Benjamín Pla, Pedro Piqueras, Pau Bares, André Nakaema Aronis","doi":"10.1177/14680874241261101","DOIUrl":"https://doi.org/10.1177/14680874241261101","url":null,"abstract":"The purpose of this study is to enhance control strategies for selective catalytic reduction (SCR) and ammonia slip catalyst (ASC) systems, aiming to effectively reduce NOx emissions from automotive engines during realistic driving cycles. Despite the effectiveness of these after-treatment systems (ATS), their dynamic and non-linear characteristics present significant challenges in achieving precise control. Therefore, this research proposes a hybrid approach that combines backward induction (BI) as the primary optimization technique with model predictive control (MPC) framework for real-time application. The article introduces a reduced-state control-oriented model of the SCR + ASC system, which is embedded into the BI algorithm to calculate optimal control actions within a finite horizon. Additionally, it is proposed an alternative approach for adapting the grid of model states within the BI algorithm, effectively reducing the computational cost. This adjustment enables the algorithm to operate in real-time with near-optimal results, as confirmed by experimental validation. Lastly, the study explores how different degrees of knowledge regarding system disturbances impact the strategy’s performance, examining three distinct scenarios: constant prediction horizon, probabilistic description, and full knowledge of the prediction horizon.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"28 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of injection timings and injection pressure on knock mitigation with a compression stroke injection of hydrous ethanol in spark ignition 火花点火压缩冲程喷射含水乙醇时，喷射时间和喷射压力对缓解爆震的影响

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-24 DOI: 10.1177/14680874241258533

John Gandolfo, Benjamin Lawler, Brian Gainey

{"title":"Effect of injection timings and injection pressure on knock mitigation with a compression stroke injection of hydrous ethanol in spark ignition","authors":"John Gandolfo, Benjamin Lawler, Brian Gainey","doi":"10.1177/14680874241258533","DOIUrl":"https://doi.org/10.1177/14680874241258533","url":null,"abstract":"Direct injection fuel systems provide precise control over the amount of fuel injected and can enable higher compression ratio operation and earlier combustion phasing under knock-limited operation, particularly for fuels with a high cooling potential like hydrous ethanol, a blend of 92% ethanol and 8% water. Moving a portion of the total fuel mass from an intake stroke injection to a compression stroke injection can provide a knock suppression benefit, which can enable more efficient operation. In this work, the influence of injection pressure on this split injection spark ignition strategy is examined. The effect of injection pressure on two intake stroke injections were characterized, with an injection pressure of 200 bar improving combustion efficiency by ∼3 percentage points and advancing knock-limited CA50 by 1 crank angle degree over an injection pressure of 30 bar. Then, a compression stroke injection was introduced and swept into the compression stroke while maintaining the two intake stroke injections. Direct injections at an injection pressure of 30 bar enabled a small knock intensity reduction of ∼20%, whereas an injection pressure of 200 bar enabled a larger reduction of ∼90% in knock intensity. The spark timing advance permitted by the reduction in knock intensity with a compression stroke injection timing of −80 degrees after top dead center was 0.3 and 2.0 degrees at an injection pressure of 30 and 200 bar, respectively. Then, the second intake stroke injection was varied at 200 bar to evaluate how the stratification profile prior to the compression stroke injection impacted its ability to reduce knock intensity. It was found that compression stroke injections with an early second intake stroke injection was effective at reducing knock intensity throughout the compression stroke. As the second intake stroke injection was retarded, the early compression stroke injections became less effective at suppressing knock.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"39 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on combustion instability characteristics in a pre-chamber natural gas engine under lean burn conditions 贫燃条件下前置燃烧室天然气发动机燃烧不稳定性特征的实验研究

IF 2.5 4区工程技术

International Journal of Engine Research Pub Date : 2024-07-24 DOI: 10.1177/14680874241254882

Xue Yang, Guanguan Li, Yong Cheng, Pengcheng Wang, Yanlei Zhao

{"title":"Experimental study on combustion instability characteristics in a pre-chamber natural gas engine under lean burn conditions","authors":"Xue Yang, Guanguan Li, Yong Cheng, Pengcheng Wang, Yanlei Zhao","doi":"10.1177/14680874241254882","DOIUrl":"https://doi.org/10.1177/14680874241254882","url":null,"abstract":"Pre-chamber jet ignition is a key technology for future high-efficiency natural gas (NG) engines. It can achieve fast and stable combustion through excellent ignition performance. However, there are still some challenges, such as high combustion instability near the lean burn limit and the narrow engine operating range. Therefore, this paper investigates the combustion instability of a pre-chamber NG engine under ultra-diluted conditions by experimental method. At two engine loads, experiments are carried out with different jet ignition intensity schemes to study the effect of jet ignition intensity on the cyclic combustion variations. Then, the combustion instability characteristics of the pre-chamber NG engine are studied by cyclic variation analysis and phase space reconstruction. The results show that with the increase in the jet ignition intensity, the cyclic combustion variations decrease, and the cyclic variation coefficient of the indicated mean effective pressure decreases to below 2%. The lean burn limit of the pre-chamber natural gas engine is extended to an excess air ratio of 2.0. The operation instability of the pre-chamber NG engine is mainly due to cyclic variations in the ignition and combustion process. The nonlinear dynamic analysis shows that the combustion process in the lean burn pre-chamber NG engine behaves with chaotic characteristics under the operating conditions of low jet ignition intensity. As the jet ignition intensity increases, the combustion stability is improved and the cycle-to-cycle variations change from fairly deterministic to more stochastic behavior. The chaotic characteristics of the combustion process become weaker. In conclusion, it is of great importance to generate stable and high ignition intensity jets for reducing combustion instability and improving combustion efficiency in lean burn pre-chamber NG engines.","PeriodicalId":14034,"journal":{"name":"International Journal of Engine Research","volume":"14 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0