摘要
本文提出了圆管内变密度流体流动与换热充分发展的概念和相关假设及其推论。在所提出的概念和假设基础上对理想气体在圆管内的流动与换热进行了解析求解,得到了充分发展时的无量纲速度抛物分布及无量纲温度分布。对圆管内密度随温度变化的氩气的流动与换热数值模拟所获得的无量纲速度分布及无量纲温度分布在入口段后与上述解析解非常吻合,从而验证了在本文的计算条件范围内,圆管内变密度流体充分发展流动与换热的概念及其解析解是合理的。
The concept and its inferences for fully developed flow and heat transfer in a tube with variable density fluid were presented.According to the concept and the inferences,the mathematical model for the flow and heat transfer of an ideal gas in the tube was solved analytically and the analytical solutions of dimensionless velocity and temperature were obtained,which gives a parabolic distribution of dimensionless velocity.A numerical simulation was performed for the argon flow and heat transfer considering d...
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第7期1199-1201,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金重点项目(No.50636050)
上海市重点学科建设项目资助(No.J50501)
关键词
充分发展的流动与换热
变密度
解析解
fully developed fluid flow and heat transfer
variable density
analytical solution
