摘要
在考虑壁面热效应的情况下，当雷诺数为0．6×10^4～5．0×10^4，分别对管径比为0．4和0．24两种工况下的柱体尾迹旋涡脱落的流动情况进行实验．结果表明：加热使得旋涡流动发生明显变化，其影响表现在旋涡脱落信号傅里叶变换峰值的改变上；这种影响随雷诺数的变化有一临界值胁。，加热在胁。两侧对旋涡所起作用相反，并且胁。随管径比的不同而不同．通过对不同管径比工况的分析比较，发现同等加热强度下小管径比的壁面热效应对旋涡流动影响更明显．
The effect of heating on vortex shedding induced by liquid flowing across a cylinder fixed in the cross section of a tube is studied. Experiments are carried out at d/D = 0.4 and 0. 24 （ ratio of cylinder diameter d to inside diameter D of tube under×10^4）. Results of experiments show a certain influence of the congdision Re = 0.6×10^4-5.0 heating of the cylinder on vortex shedding, which is reflected by the changes of acquired peak values. The effects of heating, ReL and d/D on the peak values are analyzed. The critical number ReL at different d/D rations is obtained. Investigations in this field are very useful for design and running securely in heat exchangers.
出处
《上海电力学院学报》
CAS
2008年第1期23-25,共3页
Journal of Shanghai University of Electric Power
基金
上海市自然科学基金项目(04ZR14076)
上海市教委重点资助项目(05ZZ55)
上海市重点学科建设项目(P1302)
