密集型阵列冲击射流换热特性实验  

Experimental research on heat transfer characteristics of denser jet array impingement

作　　者：王磊[1] 张靖周[1] 杨卫华[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《航空动力学报》2009年第6期1264-1269,共6页Journal of Aerospace Power

基　　金：航空科学基金(03C52019)

摘　　要：设计了多种不同几何参数的阵列射流冲击孔实验件,利用红外热像仪对其冲击冷却进行了热像显示实验,获得了冲击射流雷诺数和几何参数对局部对流换热特性的影响规律.结果表明：①对流换热系数随着射流雷诺数Rej的增加而逐渐增大;②随着孔间距的或者冲击间距的增大,冲击冷却的对流换热效果逐渐减弱;③当孔间距与孔径之比在3~5时,顺排阵列射流的强化换热效果优于叉排,而当孔间距与孔径之比为2时,在阵列射流上游叉排排布的强化换热效果优于顺排,而在下游则顺排排布的强化换热效果占优.Several jet array impingement experimental models with different holes spacing were designed to investigate the effects of impinging jet Reynolds number and geometry parameters on the local heat transfer enhancement by using the transient Infrared thermography method. The results show that.. （1）the heat transfer coefficient increases with the increasing of impinging jet Reynolds number, （2） the heat transfer enhancement becomes weaken when the jet holes spacing or jet impinging distance increase, and （3） in the case of jet holes spacing ratio arranged from 3 to 5, the heat transfer enhancement for inline jet array is higher than that of staggered jet array, hut in the case of jet holes spacing ratio is 2, the heat transfer enhancement for the inline jet array is higher in the front jet rows but lower in the rear jet rows compared with staggered jet array.

关 键 词：冲击冷却 阵列射流 强化对流换热 

分 类 号：V233.1[航空宇航科学与技术—航空宇航推进理论与工程]