Case Studies in Thermal Engineering最新文献

{"title":"Thermo-physical properties of marine lubricant/hydraulic fluids and enhancing hot surface ignition characteristics considering coupling influences","authors":"Kan Wang ,&nbsp;Xinjie Gong ,&nbsp;Hanzhe Chen ,&nbsp;Yang Ming","doi":"10.1016/j.csite.2026.107885","DOIUrl":"10.1016/j.csite.2026.107885","url":null,"abstract":"<div><div>Ship fires frequently originate from an accidental ignition of spilling marine fuels on hot surface in engine room, yet detailed characterization of the initial ignition behavior remains limited. This study investigates the hot surface ignition (HSI) characteristics of marine lubricant and hydraulic oil under simulated ship engine room conditions using a dedicated experimental platform. Critical ignition parameters and thermal data were systematically obtained. The results reveal that the vapor-air mixture formed after fuel contact with the hot surface exhibits a highly stratified distribution in the vertical dimension, distinct from conventional marine diesel. As the hot surface temperature <em>T</em>_<em>s</em> increases, the initial HSI position shifts closer to the high-temperature substrate. Following flame kernel formation, the flame propagates downward toward the hot surface, with hydraulic oil exhibiting higher heat flux intensity compared to the marine lubricant. When hot surface temperature <em>T</em>_<em>s</em> exceeds 765 K, the HSI delay time of the marine lubricant stabilizes, whereas the hydraulic oil continues to show significant variability. Based on heat transfer theory and experimental data, an ignition delay prediction model is developed, and a probability-based HSI assessment framework is specifically optimized for these fuels. By integrating multi-parameter measurements and validation data, this study provides a novel methodology for evaluating the initial fire risks associated with specialized marine fuels in ship engine room.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107885"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147359837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the heat transfer enhancement of hydro-turbine thrust bearing with nano-oil","authors":"Dongbin Ji ,&nbsp;Juan Duan ,&nbsp;Xiaoxu Zhang ,&nbsp;Zeyu Peng ,&nbsp;Luyang Chen ,&nbsp;Zhumei Luo ,&nbsp;Jie Chen","doi":"10.1016/j.csite.2026.107899","DOIUrl":"10.1016/j.csite.2026.107899","url":null,"abstract":"<div><div>The thrust bearing in a hydro-turbine unit carries the entire axial load, and its cooling performance is crucial for operational safety due to the substantial frictional heat generated. This study numerically investigates the enhancement of heat dissipation in a large-scale 100-MW thrust bearing using lubricating oil doped with copper oxide nanoparticles. Nano-oils with mass concentrations ranging from 0.1 to 0.5 wt% were prepared and experimentally characterized. Their thermal performance was compared with that of pure oil under varying inlet temperatures (297–303 K) and mass flow rates (50–200 kg/s) by means of a validated CFD model. Results demonstrate that the 0.4 wt% nano-oil yields the optimal performance under baseline conditions (300 K, 132 kg/s). It reduces the pad temperature by 0.31 K and raises the outlet oil temperature by 0.14 K, indicating improved heat extraction. The corresponding Performance Evaluation Criterion (PEC) reaches 1.070, reflecting a 7 % overall thermo-hydraulic improvement. Notably, the 0.4 wt% nano-oil achieves comparable cooling without requiring lower inlet temperatures or higher flow rates, thereby lowering the energy consumption of the cooling system. This work provides a quantitative basis for the energy-efficient implementation of nano-oils in hydro-turbine thrust bearing system.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107899"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147359838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A unified standard thermal resistance-impedance-circuit approach for dynamic characteristic analysis of grid-connected solid oxide fuel cell system","authors":"Tong Hao ,&nbsp;Xingce Wang ,&nbsp;Junhong Hao ,&nbsp;Guiping Zhou ,&nbsp;Chao Xu ,&nbsp;Xiaoze Du","doi":"10.1016/j.csite.2026.107901","DOIUrl":"10.1016/j.csite.2026.107901","url":null,"abstract":"<div><div>The dynamic integration of Solid Oxide Fuel Cell (SOFC) systems with power electronics presents significant challenges due to the disparate time scales of thermo-electrochemical processes and electronic control systems. This manuscript develops a unified standard thermal resistance-impedance-circuit approach for grid-connected SOFC systems. This approach provides a comprehensive cross-scale dynamic model, coupling the standard thermal impedance (STI) method for SOFC modeling with power regulation circuit for converter and inverter, which constructs the overall system topology and characterizes the transmission and coupling characteristics of various physical parameters within different components, integrating the multi-physical processes, cross-timescale dynamics and inter-disciplined areas to facilitate real-time simulation and control. On this basis, we analyze the dynamic response processes of power electronics equipment, and SOFC systems under varying load conditions. The results show that the power electronics respond in sub-second time frames (0.15–0.5 s), Balance of Plant (BOP) components have intermediate response times (7–9 min), and SOFC stack exhibit slow response times (25–39 min) when the load changes. This unified model visualizes the transfer and coupling properties of physical parameters within different components, highlights the interactions between the slow thermal-electrochemical dynamics and the fast-switching power electronics, then emphasizes the topology's capacity to handle transient states and ensure robust performance. The proposed framework provides a pathway for enhancing computational efficiency, improving power quality, and ensuring operational stability in distributed energy systems.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107901"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147359839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel global chemical reaction mechanism for large-scale hydrogen detonation simulation","authors":"Xin Lin ,&nbsp;Qing Zhang ,&nbsp;Haoyang Liu ,&nbsp;Lidong Cheng ,&nbsp;Bin Zhang ,&nbsp;Wei Zhong","doi":"10.1016/j.csite.2026.107879","DOIUrl":"10.1016/j.csite.2026.107879","url":null,"abstract":"<div><div>Conventional modeling strategies for large-scale detonation simulations suffer from a critical trade-off: detailed chemical mechanisms involve excessive computational costs, while typical single-step schemes lack sufficient predictive accuracy. To resolve this issue, this study proposes a novel single-step chemical reaction mechanism to simulate hydrogen-fueled detonation wave propagation in large-scale geometric configurations. Due to the substantial discrepancy in equilibrium temperature between the conventional irreversible single-step reaction mechanism and the detailed mechanism, the central concept in developing the new mechanism is to calibrate the equilibrium temperature of the single-step mechanism. The Nelder-Mead simplex optimization algorithm is employed to fine-tune the thermodynamic parameters of the single-step reaction mechanism ensuring agreement with the equilibrium temperature predicted by the detailed mechanism across a broad range of operational conditions. To validate the predictive capability of the new single-step mechanism in detonation wave propagation speed and peak overpressure, three distinct test cases were simulated using an OpenFOAM-type solver. The results demonstrate that the computational accuracy of the new single-step mechanism is comparable to that of the detail model (Keromnes'11-component, 24-reaction mechanism, hereinafter referred to as the KS mechanism in this study) when comparing detonation wave velocities and overpressure peaks. Furthermore, the total simulation time of the new single-step mechanism in this study was only 1.25% of that of the KS mechanism, and the new single-step mechanism exhibits lower sensitivity to grid resolution compared to the detailed mechanism. These findings indicate that the proposed mechanism is particularly well-suited for large-scale simulations of hydrogen fuel detonation.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107879"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147359842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermally thin-intermediate-thick transition on horizontal wood flame spread under external radiation","authors":"Yang Zhou ,&nbsp;Chunli Liu ,&nbsp;Wenxi Qiu ,&nbsp;Chao Ding ,&nbsp;Zhengyang Wang ,&nbsp;Rongwei Bu","doi":"10.1016/j.csite.2026.107910","DOIUrl":"10.1016/j.csite.2026.107910","url":null,"abstract":"<div><div>Wood and its engineering products are promising materials for sustainable construction. However, flammable nature limits their further applications. The spread of fire is a disastrous behavior, which may undergo a thermally thin-intermediate-thick transition as external radiation (<span><math><mrow><msubsup><mover><mi>q</mi><mo>˙</mo></mover><mrow><mi>e</mi><mi>x</mi><mi>t</mi></mrow><mo>″</mo></msubsup></mrow></math></span>) increases. Yet, this remains insufficient understanding. The current study combines both experimental measurements and theoretical analyses to address this issue. Thermal thickness (the ratio of sample thickness to its thermal penetration depth) regimes of wood and its transition were emphasized. Both flame spread rate (<em>v</em>_<em>f</em>) and flame height increased with enhanced <span><math><mrow><msubsup><mover><mi>q</mi><mo>˙</mo></mover><mrow><mi>e</mi><mi>x</mi><mi>t</mi></mrow><mo>″</mo></msubsup></mrow></math></span> but presented an unusual non-monotonic trend (first increase then decrease) with increased thickness. The transitioning thickness coincided at 8 mm. The received total heat flux showed a similar trend to <em>v</em>_<em>f</em> with an identical transition thickness. Wood was sufficiently preheated so increasing the thickness enhanced the total fuel load and thus <em>v</em>_<em>f</em>. Wood underwent a thermally thin-intermediate-thick transition with increased thickness and <span><math><mrow><msubsup><mover><mi>q</mi><mo>˙</mo></mover><mrow><mi>e</mi><mi>x</mi><mi>t</mi></mrow><mo>″</mo></msubsup></mrow></math></span>. Analytical equations to calculate horizontal <em>v</em>_<em>f</em> of thermally intermediate materials were proposed. The thermal thickness range for thermally intermediate materials was quantitatively determined to be 0.85-3.75. The calculated <em>v</em>_<em>f</em> optimized with thermally intermediate equations better aligns with the measurements, with a determination coefficient R² of 0.96.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107910"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147360821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensitivity-guided thermo-hydro-mechanical modeling and operation of a multi-well geothermal system: A case study in the Xiong'an new area, China","authors":"Liyuan Liu ,&nbsp;Xuchang Yang ,&nbsp;Tao Wang ,&nbsp;Pengpeng Ma ,&nbsp;Yaohui Li ,&nbsp;Shengwen Luo ,&nbsp;Le Zhang","doi":"10.1016/j.csite.2026.107919","DOIUrl":"10.1016/j.csite.2026.107919","url":null,"abstract":"<div><div>Hydrothermal geothermal systems are increasingly deployed as low-carbon sources for district heating, making it essential to assess both their thermal efficiency and long-term geomechanical stability. In this study, we develop a field-scale numerical model of a multi-well hydrothermal heating system in the Xiong'an New Area, China. A coupled three-dimensional thermo-hydro-mechanical (THM) model is constructed to simulate 10 years of reservoir operation and to jointly evaluate heat extraction performance and geological stability. Distance-based generalized sensitivity analysis (DGSA) is then applied to systematically identify the parameters that exert the greatest control on thermal behavior and geomechanical response. The simulations indicate that, under the current operating conditions, the reservoir remains geomechanically stable, whereas several production wells face a pronounced risk of thermal breakthrough. Overall, injection rate and injection temperature emerge as the dominant controlling parameters, with rock heat capacity exerting an additional influence on the mechanical response. Guided by these sensitivity results, we design a sensitivity-informed injection–production strategy that mitigates thermal breakthrough and enhances long-term energy extraction. Additional THM simulations confirm the effectiveness of this strategy, underscoring its potential as a practical guideline for the design and operation of multi-well hydrothermal geothermal systems in similar geological settings.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107919"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microfluidic fabrication of phase change materials capsules with polyanine-reinforced shells for enhanced mechanical and thermal properties","authors":"Dingfan Zhang ,&nbsp;Tong Shen ,&nbsp;Cheng Yu ,&nbsp;Dongcheng Cao","doi":"10.1016/j.csite.2026.107859","DOIUrl":"10.1016/j.csite.2026.107859","url":null,"abstract":"<div><div>Thermal energy storage using phase change materials (PCMs) plays a vital role in enhancing energy efficiency across various applications, with the performance of PCM capsules being a critical determinant in packed bed thermal energy storage (PBTES) systems. This study introduces an innovative strategy to overcome the inherent limitations of low thermal conductivity and mechanical strength in conventional capsule shells by developing microfluidic-fabricated PCM capsules featuring polyaniline (PANI)-reinforced calcium alginate (CA) shells. An optimal PANI concentration of 2% is identified, which synergistically enhances the shell's thermal conductivity by 22% (from 0.6932 to 0.8451 W/(m·K)) and its mechanical strength, evidenced by a 22.69% increase in yield strength (from 658.08 to 807.37 kPa) and a 35% improvement in elastic modulus compared to pure CA shells. System-level experimental evaluation demonstrates that integrating these reinforced capsules into a PBTES system significantly improves thermal performance, reducing charging time by 6.25%, at a flow rate of 0.2 L/min. Comprehensive energy and exergy analyses confirm an increase in charging energy efficiency and exergy efficiency, indicating a reduction in thermodynamic irreversibilities. Although the incorporation of PANI results in a minimal reduction (∼0.1%) in the energy storage capacity due to the altered specific heat of the shell material, this is decisively offset by the enhancement in thermal conductivity and improvement in mechanical strength. The PANI-reinforced capsules presented herein offer a promising and effective solution for advancing the development of efficient, responsive, and durable PBTES systems.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107859"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147278945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heat transfer deterioration in helically coiled tubes with supercritical water: A numerical study on the impact of cross-sectional shapes","authors":"Jiaqi Yang ,&nbsp;Xiaoyi Wu ,&nbsp;Haode Zheng ,&nbsp;Zheng Lu ,&nbsp;Shaopeng Si ,&nbsp;Fucheng Chang ,&nbsp;Huixiong Li","doi":"10.1016/j.csite.2026.107844","DOIUrl":"10.1016/j.csite.2026.107844","url":null,"abstract":"<div><div>Supercritical water flow in helically coiled tubes (HCTs) offers a promising solution for high-efficiency, compact heat exchangers in advanced power systems. This study conducts a numerical investigation of wall temperature and heat transfer coefficient (<em>h</em>) in circular HCT (C-HCT), horizontally elliptical HCT (HE-HCT), and vertically elliptical HCT (VE-HCT) at 25 MPa. Numerical analysis reveals that local heat transfer coefficient (<em>h</em>_local) distributions exhibit distinct sensitivities to cross-sectional shapes: the order of <em>h</em>_local at the top of the inner wall of the tube is HE-HCT &gt; C-HCT &gt; VE-HCT, whereas at the inner side of the inner wall of the tube, the order is VE-HCT &gt; C-HCT &gt; HE-HCT, with the <em>h</em>_local at the inner side of VE-HCT being 41.1% higher than C-HCT at high heat flux. As bulk fluid temperature or mass flux increases, centrifugal force dominates, and temperature and velocity distributions become increasingly symmetrical, and the location with the lowest <em>h</em>_local moves inward. In terms of the average <em>h</em> on the cross-section, C-HCT outperforms HE-HCT and VE-HCT across the investigated bulk fluid enthalpy range, demonstrating its superior overall heat transfer efficiency. At high mass flux, although VE-HCT exhibit a 63.1% lower circumferential wall temperature inhomogeneity compared to C-HCT, indicating improved temperature uniformity, this comes at the expense of heat transfer performance. The average <em>h</em> on the cross-section for VE-HCT is only 71% of that for C-HCT. These results could provide essential theoretical insights and actionable recommendations for the design of high-performance heat exchangers in the lead-cooled fast reactors.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107844"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Damage evaluation and resistance enhancement technologies for highway tunnels under high-power fire conditions","authors":"Yufeng Sun ,&nbsp;Miaohang Kang ,&nbsp;Mingxia Zhang ,&nbsp;Fei Ye ,&nbsp;Xiaolin Weng ,&nbsp;Chaodi Zhu ,&nbsp;Dengfei Xu","doi":"10.1016/j.csite.2026.107865","DOIUrl":"10.1016/j.csite.2026.107865","url":null,"abstract":"<div><div>The operation of highway tunnels involves numerous complex challenges, which become particularly pronounced during extreme disasters such as fires. This study takes the Qinling Tiantai Mountain Highway Tunnel as the engineering background and focuses on damage evaluation and resistance enhancement technologies under fire scenarios. First, a coupled thermal-mechanical numerical model of the highway tunnel is established using FDS and ANSYS co-simulation to identify the most hazardous cross-section under a 100 MW fire source. Subsequently, a resilience quantification model is developed based on strain energy, and a resilience evaluation system for highway tunnels under fire conditions is constructed by selecting appropriate recovery functions and recovery times to calculate the resilience index. Finally, the effectiveness of five protective measures, including fire-resistive coatings, fire-resistive panels, concrete sacrificial layers, concrete types, and sprinkler systems, in enhancing the fire resilience of the lining structure is compared and analyzed. This study introduces resilience theory into the field of tunnel fire safety, and the proposed resilience evaluation method can provide a theoretical basis and important references for the disaster prevention design, disaster assessment, and post-disaster recovery of highway tunnels.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107865"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pore-scale study on convection-radiation heat transfer and flame front morphology of premixed methane/air combustion in randomly packed bed","authors":"Huanyu Xu,&nbsp;Yongfang Xia,&nbsp;Xiaohu Guan,&nbsp;Haiyang Wang,&nbsp;Jie Xu,&nbsp;Chao Wei","doi":"10.1016/j.csite.2026.107873","DOIUrl":"10.1016/j.csite.2026.107873","url":null,"abstract":"<div><div>Porous medium combustion is recognized for its high thermal efficiency, low pollutant emissions, and superior flame stability. However, the pore-scale mechanisms governing convection-radiation coupling and flame morphology remain insufficiently understood. This study investigates premixed methane-air combustion within a randomly packed bed of Al₂O₃ spheres through pore-scale numerical simulations. The <em>k-ε</em> turbulence model, combined with the Eddy Dissipation Concept for combustion chemistry and the Discrete Ordinates (DO) model for radiative transfer, is employed. A systematic sub-domain scaling analysis identifies the N = 3 configuration, a symmetric segment scaled to three times the particle diameter, as the optimal trade-off between predictive fidelity and computational cost. Simulations for three pore Reynolds numbers (<em>Re</em>_<em>p</em>= 250, 350, 450) elucidate the characteristics of convection-radiation coupling within porous media combustion. Increased <em>Re</em>_<em>p</em> enhances convective transport, shifting the flame front downstream, while radiation reinforces upstream heat recirculation. Quantitatively, radiation attenuates the mean gas temperature by up to 8.1% but amplifies the peak heat flux by approximately 90% and 59% at <em>Re</em>_<em>p</em> = 250 and 350, respectively. Besides, the peak heat release rate exhibits a non-monotonic trend, and the axial radiation flux intensifies substantially across the burner, with increments of 45.8% and 11.2% as <em>Re</em>_<em>p</em> increases from 250 to 450. The findings offer mechanistic guidance of heat recirculation and flame stability within porous media combustion for the industrial applications of porous burners.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"80 ","pages":"Article 107873"},"PeriodicalIF":6.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}