宏观能质输运的耗散分析  

Analysis of dissipation construction in macroenergy and mass transport

作　　者：刘伟[1] 王勇积 LIU Wei;WANG YongJi(School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074

出　　处：《中国科学：技术科学》2022年第12期1887-1900,共14页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:51736004)资助项目。

摘　　要：本文基于线性唯象关系和能质守恒定律,导出宏观能质输运方程的平衡形式和能质输运效率,揭示了能质输运的耗散机制;基于非平衡态热力学和能质输运理论,提出统一表征能质耗散的作用量等价原理以及最小耗散原理,构建了宏观能质输运的线性耗散结构.针对圆管内插燕尾翼扰流组件的数值计算表明,在不同无量纲截距下,管内均呈现出多涡纵向旋流的低耗散流场结构.当Re数为300~1500时,在给定的组件结构参数下,热传递效率超过98.6%,?传递效率为84%~93.2%,功传递效率为86.7%~99.1%,动能传递效率为12.3%~37.5%.In this paper,a set of equilibrium equations on the macroenergy-mass transport and the efficiencies of energy-mass transport were proposed based on the linear phenomenological relations and the energy-mass conservation laws to reveal the dissipation mechanism of energy-mass transport.A principle of the action quantity equivalence and a principle of minimum dissipation were presented based on the nonequilibrium state thermodynamics and the energy-mass transport theory to develop a linear dissipation of macroenergymass transport.The numerical simulation of inserting the dovetail wing in a tube revealed that at different nondimensional pitches,a low dissipation flow field of longitudinal swirl with multivortexes was formed in the tube.When the Reynolds number is 300–1500 at various insert parameters,thermal transport efficiency exceeds 98.6%,exergy transport efficiency ranges between 84%and 93.2%,power transport efficiency varies from 86.7%to 99.1%,and momentum transport efficiency ranges between 12.3%and 37.5%.

关 键 词：能质输运 耗散结构 燕尾翼 内插物 

分 类 号：O414.1[理学—理论物理]