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首页> 外文期刊>International Journal of Heat and Mass Transfer >Development of a new heat transfer optimization method for compressible fluid flows and it numerical verifications
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Development of a new heat transfer optimization method for compressible fluid flows and it numerical verifications

机译：新型可压缩流体传热优化方法的开发及其数值验证

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摘要

A general optimization criterion for heat transfer process is developed based on the entransy theory. Then, a modified field synergy principle for compressible viscous fluid, which represents the irreversibil-ity of the specific heat transfer processes, is discussed. Modified field synergy equations are set up and theoretically, the solution of the modified field synergy equations under the constraint conditions of a given mean kinetic energy is able to show the optimal flow field, in which the amount of heat transfer is maximized. In the study, a numerical simulation of the heat transfer processes of air in a cavity is selected as the numerical verification of the modified field synergy equations. Numerical simulation results show that asymmetric vortices are generated in the flow field due to the variation of the density. These vortices enhance the heat transfer performance in the absence of too much work dissipation. Comparisons among the results of the Navier-Stokes equations, the existed laminar field synergy equations, and the modified field synergy equations are made. The results confirm that the equations developed in this study correspond to the best heat-transfer performance when the density of fluid changes with temperature or pressure.
机译：基于熵理论，建立了传热过程的一般优化准则。然后，讨论了可压缩粘性流体的改进场协同原理，该原理代表了特定传热过程的不可逆性。建立了修正的场协同方程，从理论上讲，在给定的平均动能约束条件下，修正的场协同方程的解能够显示最优的流场，其中传热量最大。在研究中，选择了空腔中空气传热过程的数值模拟作为修正场协同方程的数值验证。数值模拟结果表明，由于密度的变化，在流场中产生了不对称的涡流。在没有太多功耗的情况下，这些涡旋增强了传热性能。比较了Navier-Stokes方程，现有的层流场协同方程和改进的场协同方程的结果。结果证实，当流体密度随温度或压力变化时，本研究开发的方程式与最佳传热性能相对应。

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  • 作者

    Meng-He Sun; Xin-Rong Zhang; Lin Chen;

  • 作者单位

    Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, China;

    Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, China,Beijing Engineering Research Center of City Heat, Peking University, Beijing 100871, China;

    Institute of Fluid Science, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan,Overseas Research Fellow of Japan Society for the Promotion of Science (JSPS), Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Compressible fluid; Variable property; Field synergy equation; Entransy dissipation; Optimization;

    机译：可压缩流体可变属性;场协同方程;转移耗散;优化;

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