旋转状态半受限冲击射流流动和换热特性研究  

INVESTIGATIONS OF FLOW AND HEAT TRANSFER OF AIR IMPINGEMENT JET IN ROTATING HALF-LIMITED SPACE

作　　者：毛军逵[1] 白云峰[1] 常海萍[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《工程热物理学报》2006年第6期984-986,共3页Journal of Engineering Thermophysics

基　　金：国防基础科研资助项目(No.J1400D001);南京航空航天大学能源与动力学院青年基金资助项目(No.20031028)

摘　　要：利用数值模拟的方法,通过改变冲击雷诺数Rej(20000-35000)、旋转数Ro(0-0．0117)等参数,分析旋转条件下半受限单孔冲击射流的流动和换热特性,讨论了旋转对冲击射流的流场结构和换热特性的影响．研究结果表明:冲击射流在离心力和哥氏力的共同作用下发生弯曲,造成冲击靶面上的冲击斑随着旋转数Ro的增加而不断偏移,显著影响了冲击的冷却效果．冲击靶面的平均Nu数随着冲击雷诺数Rej的增加而增加;当旋转数Ro增加时,冲击靶面的平均Nu数先增加,后减小,然后再增加．计算结果和试验结论基本一致．Numerical simulations were carried out to investigate the effect of rotation on air impingement cooling in a half-limited space. Reynolds number（Rej） of 20000～35000 and rotation number（Ro） of 0～0.0117 were changed to study the flow and heat transfer of impingement cooling applied under rotating conditions. The results show that the jet was blended because of the centrifugal and coriolis force and the stagnation region changed according to it. Average Nu increased with Rej. When Ro increased, Nu number increased firstly and then decreased, finally it increased again. The agreement between numerical simulations and experimental data is good.

关 键 词：换热 旋转 冲击冷却 半受限 

分 类 号：TK124[动力工程及工程热物理—工程热物理]