International Journal of Thermal Sciences最新文献_第3页

Overcooling-preventive electrospun film doped with W-VO2 nanoparticles for dynamic radiative cooling 掺杂W-VO2纳米粒子的防过冷静电纺丝膜动态辐射冷却

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-29 DOI: 10.1016/j.ijthermalsci.2025.110356

Hongyuan Yin, Jiuzhou Zhao, Fenghua Zhang, Kangkang Tang, Feihang Long, Ying An, Jianyun He, Yumei Ding, Yuntao Hu, Maoqian Xie, Weimin Yang

{"title":"Overcooling-preventive electrospun film doped with W-VO2 nanoparticles for dynamic radiative cooling","authors":"Hongyuan Yin, Jiuzhou Zhao, Fenghua Zhang, Kangkang Tang, Feihang Long, Ying An, Jianyun He, Yumei Ding, Yuntao Hu, Maoqian Xie, Weimin Yang","doi":"10.1016/j.ijthermalsci.2025.110356","DOIUrl":"10.1016/j.ijthermalsci.2025.110356","url":null,"abstract":"<div><div>Radiative cooling is an emerging green technology in which an object naturally cools down through radiation heat transfer without any energy consumption. However, it induces overcooling at cold nights or in winters. This hinders its potential applications in various scenarios like residential buildings and clothing. Here, an overcooling-preventive radiative cooling film was prepared using electrospinning, incorporating tungsten doped vanadium dioxide nanoparticles into a poly(vinylidene fluoride-hexafluoropropylene) matrix. Experiments and simulations have proved that it can automatically weaken the radiative cooling function below the critical temperature, thus avoiding overcooling. The nighttime temperature drop induced by the film was 3.8 °C, while the counterpart was 6.5 °C, with an automatic tuning of 42 %. Simulations reveal that the film is applicable at different geographical regions under various climatic conditions. The composite film can be applied in clothing, curtains, tentages, and car covers to improve thermal comfort and health of users, and is conducive to energy conservation and carbon reduction of the society.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110356"},"PeriodicalIF":5.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217571","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}

引用次数: 0

Enhanced ionic wind output using emitter-surface decoration under varying ambient conditions 在不同的环境条件下，利用发射器表面装饰增强离子风输出

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-29 DOI: 10.1016/j.ijthermalsci.2025.110351

J.G. Qu , X.W. Wu , J.F. Zhang , X. Zhao , L.M. Yan

{"title":"Enhanced ionic wind output using emitter-surface decoration under varying ambient conditions","authors":"J.G. Qu , X.W. Wu , J.F. Zhang , X. Zhao , L.M. Yan","doi":"10.1016/j.ijthermalsci.2025.110351","DOIUrl":"10.1016/j.ijthermalsci.2025.110351","url":null,"abstract":"<div><div>Ionic wind is a novel airflow phenomenon for cooling, food drying, and flow control etc. Decorating the emitter is an effective method to reduce corona-inception voltage and enhance wind-velocity output. However, its underlying correlation mechanisms have not been fully revealed, and the influence of ambient conditions on the effectiveness of emitter decoration remains unclear. In this study, an ionic wind blower is investigated to reveal the changes in corona-discharge behavior and ionic wind output after the emitter is decorated with graphene and carbon nanotubes (CNTs), respectively. The influence of temperature and humidity on the effectiveness of emitter decoration in enhancing corona and ionic wind output are clearly identified. The results indicate graphene decoration increases the Trichel-pulse frequency (by at least 16.83 % at 20 °C) but reduces pulse amplitudes, while CNT decoration has the opposite effect, reducing the frequency by up to 52.4 % at 20 °C. Emitter decoration lowers the corona-inception voltage and increases discharge current at low humidity. High humidity weakens or even cancels the effectiveness of emitter decoration in enhancing corona. Temperature rise further suppresses the intended enhancement effect of emitter decoration owing to the increased current magnitude and intensified condensation. Emitter decoration significantly boosts ionic wind velocity and remains effective across varying temperatures and humidity levels. CNT decoration is more effective than graphene decoration, proving the advantages of micron-scale discharge sites.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110351"},"PeriodicalIF":5.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217568","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}

引用次数: 0

Investigation on the thermal performance of honeycomb bionic fin latent heat thermal energy storage units 蜂窝仿生翅片潜热蓄热装置热性能研究

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-29 DOI: 10.1016/j.ijthermalsci.2025.110333

Yu Yang , Kun Zhang , Liangbi Wang , Qiang Zhang , Kewei Song , Guangtian Shi

{"title":"Investigation on the thermal performance of honeycomb bionic fin latent heat thermal energy storage units","authors":"Yu Yang , Kun Zhang , Liangbi Wang , Qiang Zhang , Kewei Song , Guangtian Shi","doi":"10.1016/j.ijthermalsci.2025.110333","DOIUrl":"10.1016/j.ijthermalsci.2025.110333","url":null,"abstract":"<div><div>A novel latent heat thermal energy storage (LHTES) unit with honeycomb structure (HCS) fins is proposed to improve the thermal performance. The effects of geometric parameters, including fin thickness ratio and the number of layers, on the solidification process of phase change materials (PCM) were investigated by numerical simulation. The results showed that the novel HCS finned LHTES unit significantly increases the solidification rate of PCM, leading to a more uniform temperature distribution. The HCS finned unit has the shortest solidification time and the highest heat transfer rate when it is compared to the plate finned, tree-shaped finned, and spider web finned structures. The three-layer HCS finned LHTES unit with a fin thickness ratio of 1:1:1 is considered the benchmark LHTES unit. Compared with the benchmark unit, the LHTES unit with a six-layer finned unit increases the average heat transfer rate by 30 %, but it also decreases the fin efficiency by 8.1 % due to the increasing conduction thermal resistance. Correspondingly, the LHTES unit with the optimal fin thickness ratio of 3:2:1 can increase the heat transfer rate by 14 % and shorten the solidification time by 12.7 %, respectively. In addition, the copper fin has the highest thermal conductivity and exhibits the best performance when it is compared with the aluminum, aluminum alloy, and steel fins. Thus, this study can provide a theoretical basis and technical reference for the optimal design of high-performance LHTES units.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110333"},"PeriodicalIF":5.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217463","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}

引用次数: 0

Aerodynamic and thermal characteristics of inclined tandem square cylinders under mixed convection 混合对流条件下斜列方形圆柱的气动与热特性

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-29 DOI: 10.1016/j.ijthermalsci.2025.110332

Seda Kırmacı Arabacı, Fatih Selimefendigil

{"title":"Aerodynamic and thermal characteristics of inclined tandem square cylinders under mixed convection","authors":"Seda Kırmacı Arabacı, Fatih Selimefendigil","doi":"10.1016/j.ijthermalsci.2025.110332","DOIUrl":"10.1016/j.ijthermalsci.2025.110332","url":null,"abstract":"<div><div>This study presents a numerical investigation of airflow past inclined tandem square cylinders under mixed convection conditions, with a fixed Reynolds number (Re = 100) and Prandtl number (Pr = 0.71). The Boussinesq approximation is employed to model the effects of thermal buoyancy on flow dynamics and convective heat transfer. The analysis focuses on evaluating aerodynamic and thermal characteristics, including drag and lift coefficients, Strouhal number, and Nusselt number, across various configurations of tandem square cylinders at low Reynolds numbers using a two-dimensional numerical simulation. The study explores Ri ranging from 0.2 to 1 and gap ratios (s/d = 2, 4, 8) for three inclination angles: (0°, 0°), (0°, 45°), and (45°, 45°). Flow visualization is performed through streamline, vorticity, and temperature contours, while quantitative analysis is conducted based on Nusselt numbers and aerodynamic coefficients. The results demonstrate that thermal buoyancy significantly influences vortex dynamics, suppressing vortex shedding at higher Ri values, particularly in inclined configurations. Additionally, an increase in Richardson number enhances convective heat transfer, with Nusselt numbers increasing in the trailing cylinder due to buoyancy-driven flow modifications.</div><div>This research provides valuable insights into buoyancy-driven aerodynamics and heat transfer mechanisms, offering potential applications in thermal management and flow control strategies.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110332"},"PeriodicalIF":5.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217464","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}

引用次数: 0

Determination of evaporative area of hollow fiber membrane module for evaporative cooling based on surface morphology and hydrophobicity 基于表面形貌和疏水性的蒸发冷却中空纤维膜组件蒸发面积的测定

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-29 DOI: 10.1016/j.ijthermalsci.2025.110341

Weichao Yan, Yu Zhang, Chengwei He, Yilin Liu, Xin Cui, Xiangzhao Meng, Liwen Jin

{"title":"Determination of evaporative area of hollow fiber membrane module for evaporative cooling based on surface morphology and hydrophobicity","authors":"Weichao Yan, Yu Zhang, Chengwei He, Yilin Liu, Xin Cui, Xiangzhao Meng, Liwen Jin","doi":"10.1016/j.ijthermalsci.2025.110341","DOIUrl":"10.1016/j.ijthermalsci.2025.110341","url":null,"abstract":"<div><div>Hollow fiber membrane-based evaporative cooling is regarded as an efficient, energy-saving, hygienic, and versatile cooling solution. However, most existing studies simplify the calculation of evaporative area, leading to inaccurate estimates of heat and mass transfer behavior. This study proposes a theoretical model for determining evaporative area, addressing the physical phenomenon at the micro level by incorporating membrane surface morphology and hydrophobicity. Fractal theory is employed to quantify the roughness of the membrane surface, and the apparent contact angle and evaporative area calculation models are established based on the Wenzel model. The proposed model is validated through membrane material characterization and experimental testing of membrane modules. In addition, the influence of membrane properties on the evaporative area during the membrane-based evaporative cooling process is investigated. The results show that the theoretical model for evaporative area matches experimental data with a relative error of less than 5 %. Membranes with higher surface fractal dimension, intrinsic contact angle, and porosity are found to theoretically increase the evaporative area beyond the total membrane area, thereby enhancing heat and mass transfer performance. The developed evaporative area calculation method can be applied to numerical modeling of membrane-based evaporative cooling processes, enabling more accurate predictions of system behavior and providing theoretical guidance for membrane material selection and optimization.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110341"},"PeriodicalIF":5.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217465","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}

引用次数: 0

Three-dimensional temperature field tomographic reconstruction of diffusion flame based on information entropy termination criterion 基于信息熵终止准则的扩散火焰三维温度场层析重建

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-29 DOI: 10.1016/j.ijthermalsci.2025.110350

Biao Zhang , Wei-Jian Peng , Yu-Dong Liu , Jian Li , Chuan-Long Xu

{"title":"Three-dimensional temperature field tomographic reconstruction of diffusion flame based on information entropy termination criterion","authors":"Biao Zhang , Wei-Jian Peng , Yu-Dong Liu , Jian Li , Chuan-Long Xu","doi":"10.1016/j.ijthermalsci.2025.110350","DOIUrl":"10.1016/j.ijthermalsci.2025.110350","url":null,"abstract":"<div><div>Temperature represents a critical parameter in combustion system characterization, where radiation thermometry has become the predominant non-invasive technique for flame temperature monitoring. In the reconstruction of temperature fields, the inherent semi-convergence phenomenon of inversion algorithms requires particular attention to termination criteria, as these parameters crucially affect both computational efficiency and reconstruction accuracy. This study introduces an innovative termination criterion based on information entropy to address this challenge, enabling rapid identification of optimal inversion results while ensuring timely iteration cessation. Unlike conventional criteria relying on residual errors or predetermined iteration counts, the entropy-based approach exhibits broader applicability with reduced dependence on empirical parameters. Numerical simulations initially confirm the existence of semi-convergence during iterative reconstruction processes. Subsequent comparative analyses of various termination criteria under different measurement error conditions reveal the superior performance of the information entropy method. Robustness evaluations across varying signal-to-noise ratios and relaxation factors further substantiate the method's stability. Experimental validation was conducted using a multi-camera imaging system to measure three-dimensional temperature distributions in non-axisymmetric ethylene diffusion flames, achieving a 0.8925 correlation coefficient in back-projection verification that demonstrates practical effectiveness. Both numerical and experimental results confirm that the information entropy termination criterion provides reliable performance under measurement uncertainty conditions, offering significant advantages for simulation studies and practical combustion diagnostics.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110350"},"PeriodicalIF":5.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217466","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}

引用次数: 0

Argon, helium, and hydrogen blending to LPG flames issuing from swirl-induced burner: Thermal energy and CO inhibition 氩气、氦气和氢气混合到从涡流燃烧器发出的LPG火焰：热能和CO抑制

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-29 DOI: 10.1016/j.ijthermalsci.2025.110340

Ahmed Mahfouz M.M. Abd-Elgawad , Karim Emara , Ahmed Emara

{"title":"Argon, helium, and hydrogen blending to LPG flames issuing from swirl-induced burner: Thermal energy and CO inhibition","authors":"Ahmed Mahfouz M.M. Abd-Elgawad , Karim Emara , Ahmed Emara","doi":"10.1016/j.ijthermalsci.2025.110340","DOIUrl":"10.1016/j.ijthermalsci.2025.110340","url":null,"abstract":"<div><div>Carbon monoxide is one of the most dangerous poisonous gases. These gases kill human beings and harm the environmental surroundings. The current investigation illustrates production of non-carbonados fuel (Hydrogen) from water electrolysis. Argon, Helium and Hydrogen are used as additives for liquified petroleum gas (LPG) fuel with blending ratios (5, 10, 15, 30 and 40 %). Experimental measurements and numerical simulations results have been conducted at air fuel ratios (AFR = 24 and 18) and constant thermal load. Comparative findings show that blending hydrogen gas would diminish CO emissions by 70 % and 55 % by blending H<sub>2</sub> 30 %. Hydrogen causes higher turbulence and better homogenous mixture. Helium and Argon are inert carriers used to increase thermal conductivity, inhibit thermal NOx formation and enhance flame stability over wide range of operating conditions. Higher soot nuclei concentrations are located at the upper flame front. Large, medium boilers and furnaces could use the current issues to minimize pollutants and enhance thermal energy productivity.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110340"},"PeriodicalIF":5.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217462","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}

引用次数: 0

Transient thermo-elasto-hydrodynamic study of herringbone-grooved mechanical face seal during start-up stage 人字槽机械端面密封启动阶段瞬态热弹水动力研究

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-29 DOI: 10.1016/j.ijthermalsci.2025.110355

Yongfan Li , Muming Hao , Noël Brunetière , Qiang Li , Jiasheng Wang , Baojie Ren

{"title":"Transient thermo-elasto-hydrodynamic study of herringbone-grooved mechanical face seal during start-up stage","authors":"Yongfan Li , Muming Hao , Noël Brunetière , Qiang Li , Jiasheng Wang , Baojie Ren","doi":"10.1016/j.ijthermalsci.2025.110355","DOIUrl":"10.1016/j.ijthermalsci.2025.110355","url":null,"abstract":"<div><div>A comprehensive numerical solution is developed for the transient thermo-elasto-hydrodynamic (TEHD) characteristics of mechanical face seals. Transient lubrication features of the fluid film, transient thermal deformation features of the seal rings, dynamic behavior, and rough faces contacting are coupled. The finite volume method is utilized for the fluid film solution, and the Duhamel's principle contributes to calculation of the time-varying solid properties. An overall flowchart for the numerical solution is established, with an approach of Parallel Dual Time Steps (PDTS approach) proposed and utilized for the explicit time solver. Both of the efficiency and accuracy of the PDTS approach are evaluated by comparing with the reference. An outer-herringbone-grooved face seal in a start-up stage is studied. The simultaneously existing physical effects of the face expansion and the seal ring movement are successfully simulated with the proposed method. Neglecting viscosity-temperature effect and convergent gap forming could underestimate the load-carrying capacity of the fluid film; smaller contacting force but larger maximum contacting pressure are found comparing with the THD and HD results; performance keeps varying at steady speed due to thermal lag effect. The proposed numerical solution could be impactful for mechanism analyzing of the undesirable running of mechanical face seals related to the transient TEHD effects.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110355"},"PeriodicalIF":5.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217569","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}

引用次数: 0

Effects of the coating type and yarn fiber volume fraction on the coupling heat transfer characteristics for the ceramic matrix composite plate 涂层类型和纱线纤维体积分数对陶瓷基复合材料板耦合传热特性的影响

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-27 DOI: 10.1016/j.ijthermalsci.2025.110352

Kun DU , Min Xia , Cunliang Liu , Bengt Sunden

{"title":"Effects of the coating type and yarn fiber volume fraction on the coupling heat transfer characteristics for the ceramic matrix composite plate","authors":"Kun DU , Min Xia , Cunliang Liu , Bengt Sunden","doi":"10.1016/j.ijthermalsci.2025.110352","DOIUrl":"10.1016/j.ijthermalsci.2025.110352","url":null,"abstract":"<div><div>Ceramic matrix composites (CMCs) are recognized as optimal materials for future aero-engine applications due to their low density and excellent high-temperature resistance performance. However, the anisotropic thermal conductivity presents substantial challenges in thermal analysis, which restricts the application to high-temperature components. In this paper, a 2D woven structure model of a CMC plate was reconstructed using 3D Computed Tomography (CT) scanning technology based on its actual structure. Then, numerical simulations were conducted to investigate the coupling heat transfer characteristics of the CMC plate, focusing on different coating types and yarn's fiber volume fractions (<em>V</em>). The results reveal that the overall cooling effectiveness derived from the woven structure model differs from that of the homogeneous model, as the latter fails to capture the temperature gradient differences between the yarn and the matrix. As <em>V</em> increases from 0.2 to 0.5, the overall cooling effectiveness decreases by 2.4 %, and the temperature gradient differences between the yarn and the matrix become more pronounced. Furthermore, applying coatings to the CMC plate intensifies the temperature gradient differences across various regions and enhances the overall cooling effectiveness by up to 2.2 %.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110352"},"PeriodicalIF":5.0,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217467","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}

引用次数: 0

Experimental study of flow boiling heat transfer characteristics in small channels under mechanical vibration 机械振动作用下小通道流动沸腾换热特性的实验研究

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-09-26 DOI: 10.1016/j.ijthermalsci.2025.110349

Wen-Bin Shao, Yun-Long Zhou, Zhong-Yuan Hu, Ya-Ning Liu

{"title":"Experimental study of flow boiling heat transfer characteristics in small channels under mechanical vibration","authors":"Wen-Bin Shao, Yun-Long Zhou, Zhong-Yuan Hu, Ya-Ning Liu","doi":"10.1016/j.ijthermalsci.2025.110349","DOIUrl":"10.1016/j.ijthermalsci.2025.110349","url":null,"abstract":"<div><div>Through visualization experiments, this study reveals the variation patterns and underlying mechanisms of flow boiling heat transfer characteristics in small channels under mechanical vibration. The research finds that the heat transfer performance is enhanced under the influence of vibration, but the heat flow density exceeds 13347W/m<sup>2</sup>, the heat transfer performance is no longer with the increase of vibration intensity in a single trend of enhancement. Instead, with the increase in vibration acceleration, both the heat transfer coefficient and the average wall temperature show a serpentine fluctuation. The best heat transfer performance was observed at 11.59 m/s<sup>2</sup> and 34.785 m/s<sup>2</sup> acceleration, with a maximum increase of approximately 47.6 % compared to the static channel and a wall temperature reduction of 2.65 K. The main reason for this is that the shape of the bubbles undergoes complex changes with phase position, which not only increases the gas-liquid contact area but also enhances the perturbation of the thermal boundary layer. When the acceleration reaches 15.46 m/s<sup>2</sup>, the merging of elongated bubbles weakens the heat transfer effect. With further increase in vibration acceleration, the bubble detachment was enhanced.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110349"},"PeriodicalIF":5.0,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155312","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}

引用次数: 0