摘要
本文分析了圆管内单相对流传热过程的熵产,以局部熵产率为优化目标,流动功耗一定及能量与质量守恒为约束条件,应用拉格朗日极值原理对管内流动进行分析优化,导出局部熵产率为最小时的控制方程组,并运用Fluent软件对该方程组进行数值求解,得到圆管单相优化后的速度场与温度场。结果表明,以熵产最小为目标优化后的流场为多涡的纵向旋流,其换热及流动性能较好。
The present study analyzes the entropy generation for single phase flow in tubes.Optimization for convective heat transfer is conducted when the local entropy generation rate is set as optimization objective with constant fluid power consumption,energy and mass conservation set as constraint conditions.With Lagrange extreme principle,the governing equations of minimal entropy generation are deduced.After numerical calculation on governing equations with Fluent,the optimized velocity and temperature fields are obtained.The results show that the optimized flow is longitudinal swirl flow with vortexes,which has a good performance in flow and heat transfer.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2015年第6期1311-1314,共4页
Journal of Engineering Thermophysics
基金
家重点基础研究发展计划(No.2013CB228302)
国家自然科学基金资助项目(No.51036003
No.51376069)
关键词
单相对流传热
局部熵产率
传热优化
纵向旋流
heat transfer for single phase flow
local entropy generation rate
optimization
longitudinal swirl flow
