摘要
为了深入分析螺旋槽管内传热及阻力特性,基于Fluent对16根具有不同结构参数的单头螺旋槽管进行了数值研究。分析了雷诺数Re、槽深e和螺距p对螺旋槽管内传热及阻力特性的影响,结果表明,在研究的雷诺数Re范围内（10000~45000）,螺旋槽管的努塞尔数Nu是光管的1.34~2.01倍,且随Re的增加而增加;阻力系数f是光管的2.01~6.40倍,随Re的增加而减小;Nu和f随e的增加而增加,随p的增大而减小。通过回归分析,得到了螺旋槽管传热和阻力的准则关联式,供相关工程设计参考。
In order to analyze the heat transfer and flow resistance characteristics of the tube, 16 single start tubes with different structural parameters were studied numerically based on Fluent. The effects of the Reynolds number Re, the groove depth e and pitch p on the heat transfer and flow resistance characteristics of the tube were analyzed. The results are as follows. In the range of Re=lO000-45000, the Nusselt number Nu of spirally fluted tube is 1.34 to 2.01 times that of the smooth tube, and increases with Re. Resistance coefficientfis 2.01 to 6.40 times that of the smooth tube, and decreases with the increase of Re. Nu andfincrease as e increases, and decrease as p increases. From the regression analysis, the correlations of heat transfer and resistance of the tube were obtained for engineering applications.
出处
《机械》
2014年第2期23-26,共4页
Machinery
关键词
螺旋槽管
传热特性
阻力特性
数值模拟
spirally fluted tube
heat transfer characteristic
flow resistance characteristic
numerical simulation
