摘要
为了更好地优化动力舱内的温度分布,保障工程车辆的高效稳定运行,以工程车辆动力舱为研究对象,基于热力学第二定律中的熵的概念建立评价体系,用熵方程检验动力舱内空气流动过程中的熵产,通过CFD数值仿真与熵产模型结合的方式计算动力舱内的熵产。结果表明:动力舱内温差熵产远大于摩擦熵产,在以后的优化过程中应该更多地关注同时减少温差熵产,通过对动力舱内熵产的计算,为今后工程车辆动力舱的优化提供了新的评价标准。
In order to even better optimize the temperature distribution within the power cabin and ensure the engineering vehicles effectively and stably operating,this article regarded power cabins of engineering vehicles as research object and established an evaluation system based on entropy definition within second law of thermodynamics,then tested the entropy generation in the process of air flowing in the cabin by entropy equations and calculated the entropy generation in the cabin by the method that combines CFD numerical simulation with entropy generation model.The result shows that the temperature-difference entropy generation is much more than the friction one.Therefore,it should be more concentrated on to reduce the temperature-difference entropy generation in the following optimization process.The calculation of inner-power-cabin entropy generation provides new evaluation standard for the following optimizations on engineering vehicle power cabins.
作者
薛建奇
刘佳鑫
王宝中
XUE Jian-qi;LIU Jia-xin;WANG Bao-zhong(College of Mechanical Engineering,North China University of Science and Technology,Tangshan 063210,China;School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《机械工程与自动化》
2018年第3期11-12,15,共3页
Mechanical Engineering & Automation
基金
国家科技支撑计划项目(2013BAF07B04)
湖北省技术创新专项基金资助项目(2016AAA045)
博士科研启动项目(28406999)
关键词
数值模拟
动力舱
热力学
熵产
numerical simulation
power cabin
thermodynamics
entropy generation
