Experimental investigations on round jet impingement on flow structures of convex surface target with narrow space

MAO Jun-kui; LIU Zhen-xiong; GUO Wen

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Experimental investigations on round jet impingement on flow structures of convex surface target with narrow space

更新时间：2026-07-07

- Experimental investigations on round jet impingement on flow structures of convex surface target with narrow space
- Vol. 22, Issue 10, (2007)
- 作者机构：
  
  1. 南京航空航天大学能源与动力学院,南京,210016
  2. 中国燃气涡轮研究院涡轮室,成都,610500
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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MAO Jun-kui, LIU Zhen-xiong, GUO Wen. Experimental investigations on round jet impingement on flow structures of convex surface target with narrow space[J]. 2007, 22(10).
DOI：

MAO Jun-kui, LIU Zhen-xiong, GUO Wen. Experimental investigations on round jet impingement on flow structures of convex surface target with narrow space[J]. 2007, 22(10). DOI：

摘要

利用烟线法研究了小间距、单孔冲击凸面靶板的流场结构.实验中

改变冲击雷诺数Re、冲击间距和冲击孔直径之比H/d以及冲击靶面相对曲率d/D等参数

通过拍摄流场形态

分析气流分离角度和涡旋结构随上述参数的变化规律.研究结果表明当Re

H/d较大时

在凸面靶板周向两侧形成了稳定的旋流结构.随着Re

H/d的增加

冲击射流与靶面分离处对应的圆心角增大

分离推迟.实验中还发现当d/D减小

流体与靶面的分离提前

其相对应的圆心角呈现减小的趋势.

Abstract

The flow structure of convex surface target with narrow space under round jet impingement was investigated by smoke wire flow visualization.Reynolds number Re(750-1500)

the ratio of the jet impingement distance to the diameter of the jet hole H/d(0.2-1)

and the relative curvature d/D were modified in this experiment.The changes of flow separation angle and vortex dependently of above-specified parameters were analyzed through capture of flow field state.The results shows that

when Re

H/D are larger

a stable vortex is generated at two sides of the convex surface.With the increase of Re and H/D

the air separation is delayed when the radius angle of jet flow corresponding to surface separation increases.It was also observed in the experiment that the separation was caused in advance and the corresponding radius angle decreased when d/D declined.

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