微尺度阵列射流冲击结构换热特性实验研究

发布时间：2018-02-23 02:17

本文关键词： 微尺度阵列冲击换热系数微尺度实验克努森数雷诺数　出处：《推进技术》2016年09期 　论文类型：期刊论文

【摘要】：为了研究真实发动机尺寸下带有长圆形扰流柱阵列射流冲击结构的换热特性,选取雷诺数Re范围为1000~10000,并保证与真实发动机工况相同的克努森数Kn条件下,进行了实验研究。扰流柱排布方式分为顺排和叉排,冲击孔径D=0.4mm,0.5mm,0.6mm,冲击距H/D=1,1.5,2,详细分析了几何参数对结构整体平均对流换热系数的影响。结果表明:扰流柱的排布方式对平均换热系数影响很小,原因在于长圆形扰流柱的导流作用强于扰流作用;相同雷诺数时,孔径减小,流量减小33%,换热系数最大下降幅度10%,小孔结构具有保持相同换热强度、减小流量的应用潜力;相同雷诺数时,换热系数随着冲击距的减小而增大。
[Abstract]:In order to flow column array jet impingement heat transfer structure with oblong perturbation study real engine size, the Reynolds number range of Re is 1000~10000, and the same with the real working condition of the engine of the Knudsen number Kn conditions were studied. Pinfin arrangement is divided into parallel and staggered arrangement, the impact of aperture of D=0.4mm. 0.5mm, 0.6mm, H/D=1,1.5,2 from the impact, the influence of geometric parameters on heat transfer coefficient of the whole structure of mean convection is analyzed in detail. The results show that the arrangement of the pin fin is small on the average heat transfer coefficient, the reason lies in the diversion effect is stronger than the oblong pinfin spoiler role; the same Reynolds number, the pore size decreases 33%, flow rate decreases, the maximum heat transfer coefficient decreased 10%, the hole structure has remained the same heat transfer intensity, potential flow decreases; the same Reynolds number, the heat transfer coefficient increases with the decreasing of the distance between the shock.

【作者单位】：西北工业大学动力与能源学院;中国燃气涡轮研究院涡轮室;
【基金】：国家重点基础研究发展规划资助项目(2013CB035702)
【分类号】：V231.1

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