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Journal of Thermal Science 2023年第1期32卷 206-222页

作者： HUANG Yakun SUN Jie LIU Yuhong LI Jian ZHANG Xiaosong Mechanical and Electrical Engineering College Hainan UniversityHaikou 570228China School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049China Xi'an Aerospace Composite Materials Research Institute Xi'an 710025China

Since the resin-based composite materials are of essential importance in many key engineering fields,the manufacture processes are highly worth studying and optimizing for satisfying quality control at the highest possible production *** this paper,combined with the impregnation theory,the flow-thermal-mechanical multiphysics coupling model is built to characterize,investigate and optimize the osmotic flow process of hot-melt resin in fiber fabrics with the uniformity and adequacy of resin impregnation as the evaluation ***,the osmotic flow process is characterized by the osmotic flow front of resin,which is tracked by the phase-field ***,the influencing factors of roller clearance,temperature and speed are comprehensively *** that,the simulation data of resin impregnation degree are fitted by polynomial curves,with accuracy up to 96.13%,for further investigation of interaction between influencing ***,based on the above results,the operation parameter combination for impregnation process is optimized with the response surface method and provided as the guidance for practical application.

关键词： resin impregnation process multiphysics coupling phase-field method single-factor analysis response surface method parameter optimization

A transient multiphysics coupling method based on OpenFOAM for heat pipe cooled reactors

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Science China(Technological Sciences) 2022年第1期65卷 102-114页

作者： GUO YuChuan LI ZeGuang WANG Kan SU ZiLin Department of Engineering Physics Tsinghua UniversityBeijing 100084China

Differing from traditional pressurized water reactors(PWRs),heat pipe cooled reactors have the unique characteristics of fuel thermal expansion,expansion reactivity feedback,and thermal contact *** reactors require a new multiphysics coupling *** this paper,a transient coupling method based on OpenFOAM is *** method considers power variation,thermal expansion,heat pipe operation,thermal contact conductance,and gap *** particular,the reactivity feedback caused by working medium redistribution in a heat pipe is also preliminarily considered.A typical heat pipe cooled reactor KRUSTY(Kilowatt Reactor Using Stirling TechnologY)is chosen as the research *** with experimental results of load following,the calculated results are in good agreement and show the validity of the proposed *** discuss the self-adjusting capability of this type of reactor system,a hypothetical accident is *** is assumed that at the beginning of this accident,loss of the heat sink *** 1500 s of the transient process,the reactor system recovers *** this hypothetical accident,the control rod is always out of the reactor core,and the reactor only relies on the reactivity feedback to regulate the fission *** to the simulation,the peak temperature is only about 1112 K,which is far below the safety *** for system recovery,the reactor needs approximately 2500 s to return to a steady state and can realize effective power regulation by reactivity *** study confirms the availability of this coupling method and that it can be an effective tool for the simulation of heat pipe cooled reactors.

关键词： heat pipe cooled reactor multiphysics coupling reactivity feedback KRUSTY reactor

Mechanical criterion for coal and gas outburst:a perspective from multiphysics coupling

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International Journal of Coal Science & Technology 2021年第6期8卷 1423-1435页

作者： Ting Liu Baiquan Lin Xuehai Fu Ang Liu School of Safety Engineering China University of Mining&TechnologyXuzhou 221116China Key Laboratory of CBM Resources and Dynamic Accumulation Process China University of Mining&TechnologyXuzhou 221008China Department of Energy and Mineral Engineering G3 Center and EMS Energy InstituteThe Pennsylvania State UniversityUniversity ParkPAUSA

Although a series of hypotheses have been proposed,the mechanism underlying coal and gas outburst remains *** the low-index outbursts encountered in mining practice,we attempt to explore this mechanism using a multiphysics coupling model considering the effects of coal strength and gas mass transfer on *** on force analysis of coal ahead of the heading face,a risk identification index C_(m)and a critical criterion(C_(m)≥1)of coal instability are *** to this criterion,the driving force of an outburst consists of stress and gas pressure gradients along the heading direction of the roadway,whereas resistance depends on the shear and tensile strengths of the *** results show that outburst risk decreases slightly,followed by a rapid increase,with increasing vertical stress,whereas it decreases with increasing coal strength and increases with gas pressure *** the response surface method,a coupled multi-factor model for the risk identification index is *** results indicate strong interactions among the controlling ***,the critical values of the factors corresponding to outburst change depending on the environment of the coal seams,rather than being *** the buried depth of a coal seam increases,the critical values of gas pressure and coal strength decrease slightly,followed by a rapid *** to its controlling factors,outburst can be divided into stress-dominated,coal-strength-dominated,gas-pressure-dominated,and multi-factor compound *** on this classification,a classified control method is proposed to enable more targeted outburst prevention.

关键词： Coal and gas outburst Critical criterion multiphysics coupling Response surface method

Study on Electromagnetic-Fluid-Temperature multiphysics Field coupling Model for Drum of Mine Cable Winding Truck

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CES Transactions on Electrical Machines and Systems 2021年第2期5卷 133-142页

作者： Weihua Chen Mingliang Zhou Xiaoheng Yan Zhengxing Li Xiaoxue Lin the School of Liaoning Technical University(Huludao) Liaoning Huludao 125100China

Aiming at solving problems of low efficiency,low cable capacity in current 300m open-pit mine cable winding truck,a 900 m cable winding plan was *** this paper,the mechanism of the thermal effect of the cable was described,and a two-dimensional axisymmetric electromagnetic-fluid-temperature multiphysics coupling model of the cable reel was established regarding the 900m cable reel as independent *** the structure of the drum,the number of cable winding layers,the factors of heat conduction,heat radiation and convective heat transfer in the actual working process,the steady state analysis of the multi-physical field coupling was carried *** sum of the losses of each part of the cable was obtained through the calculation of electromagnetic field,which was used as a heat source to calculate and analyze the temperature distribution of different layers of cable winding,as well as the temperature distribution and heat dissipation characteristics of different structures of the *** results show that three layers of cable winding is the best *** lowest temperature of closed cylindrical drum is 70℃after heat dissipation,which has obvious advantages compared with the lowest temperature of 85℃after heat dissipation of squirrel-cage cylindrical *** results provide a reliable theoretical basis for the research and development of a new type of mine cable winding truck with 900 m cable capacity.

关键词： Heat dissipation characteristics mine cable winding truck multiphysics coupling temperature distribution

Power-to-Hydrogen by Electrolysis in Carbon Neutrality: Technology Overview and Future Development

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CSEE Journal of Power and Energy Systems 2023年第4期9卷 1266-1283页

作者： Zhiyao Zhong Jiakun Fang Kewei Hu Danji Huang Xiaomeng Ai Xiaobo Yang Jinyu Wen Yuan Pan Shijie Cheng the State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China. Hitachi Energy Research Hitachi Energy(China)LimitedBeijing 100015China.

Power-to-hydrogen by electrolysis(PtHE)is a promising technology in the carbon-neutral evolution of *** not only contributes to renewable energy integration but also accelerates decarbonization in industrial sectors through green hydrogen *** paper presents a comprehensive review of PtHE ***,technical solutions in PtHE technology are introduced to clarify pros and cons of one ***,the multiphysics coupling and the multi-energy flow are investigated to reveal the insight mechanism during operation of compactly assembled industrial PtHE ***,the development trends of core components in PtHE plants,including electrocatalysts,electrode plates and operation strategy,are reviewed,*** thrusts needed for PtHE in carbon-neutral transition are also ***,three configurations of the PtHE plant in energy system integration are introduced,which can achieve renewable energy integration and efficient energy *** Terms-Carbon neutrality,power-to-hydrogen nby electrolysis(PtHE),multiphysics coupling,multidisciplinary.

关键词： Carbon neutrality power-to-hydrogennby electrolysis(PtHE) multiphysics coupling multidisciplinary.

Analysis of the Influence of Geometrical Parameters on the Performance of a Proton Exchange Membrane Fuel Cell

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Fluid Dynamics & Materials Processing 2024年第1期20卷 219-237页

作者： Guodong Zhang Huifang Tao Da Li Kewei Chen Guoxiang Li Shuzhan Bai Ke Sun School of Energy and Power Engineering Shandong UniversityJinan250061China Sinotruk Jinan Special Purpose Vehicle Co. Ltd.Jinan250117China

A suitable channel structure can lead to efficient gas distribution and significantly improve the power density of fuel *** this study,the influence of two channel design parameters is investigated,namely,the ratio of the channel width to the bipolar plate ridge width(i.e.,the channel ridge ratio)and the channel *** impact of these parameters is evaluated with respect to the flow pattern,the gas composition distribution,the temperature field and the fuel cell output *** results show that a decrease in the channel ridge ratio and an increase in the channel depth can effectively make the distributions of velocity,temperature and concentration more uniform in each channel and improve the output capability of the fuel *** increase in the channel ridge ratio and depth obviously reduces the flow resistance and improves the flow characteristics.

关键词： Hydrogen fuel cell bipolar plate flow channel multiphysics coupling

Magnetic fields promote electrocatalytic CO_(2)reduction via subtle modulations of magnetic moments and molecular bonding

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Eco-Environment & Health 2024年第2期3卷 247-255页

作者： Shilin Wei Weiqi Liu Peiyao Bai Chuangchuang Yang Xiao Kong Lang Xu MOE Key Laboratory of Coal Processing and Efficient Utilization School of Chemical Engineering and TechnologyChina University of Mining and TechnologyXuzhou 221116China

Introducing a magnetic-field gradient into an electrically driven chemical reaction is expected to give rise to intriguing research *** this work,we elaborate on the modes and mechanisms of electrocatalytic activity(from the perspective of alignment of magnetic moments)and selectivity(at the molecular level)for the CO_(2)reduction reaction in response to external magnetic *** establish a positive correlation between magnetic field strengths and apparent current *** correlation can be rationalized by the formation of longer-range ordering ofmagnetic moments and the resulting decrease in the scattering of conduction electrons and charge-transfer resistances as the field strength ***,aided by the magnetic-field-equipped operando infrared spectroscopy,we find that applied magnetic fields are capable of weakening the C–O bond strength of the key intermediate*COOH and elongating the C–O bond length,thereby increasing the faradaic efficiency for the electroreduction of CO_(2)to CO.

关键词： External field Magnetic dependence Molecular level multiphysics coupling