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首页> 外文期刊>Acta astronautica >Experimental investigation on impingement-effusion film-cooling behaviors in curve section
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Experimental investigation on impingement-effusion film-cooling behaviors in curve section

机译：弯曲断面冲击-渗流膜冷却行为的实验研究

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摘要

A new series of test pieces with different geometrical configuration and geometry dimensions are designed to experimentally investigate on impingement-effusion cooling behavior in curve effusion wall of combustion chamber. The test results show that the discharge coefficient increased with the increasing blowing ratio. The effusion hole-hole spacing has an effect on the discharge coefficient and the discharge coefficient commonly decreased with the increment of effusion hole-hole spacing. The blowing ratio greatly effects cooling behavior. The bigger blowing ratio is favorable for improving cooling characters. At the curved effusion wall, to begin with, cooling effectiveness increased slowly and kept a steady value in subsequence. But, for the rear end of curved effusion wall, it decreased slowly. With decreasing of effusion hole angle and effusion hole-hole spacing, cooling effectiveness is enhanced. Meanwhile, blowing ratio, effusion angle and effusion hole-hole spacing take an evident effect on the discharge coefficient.
机译：设计了一系列具有不同几何构型和几何尺寸的新试件，以实验研究燃烧室曲线积液壁中的碰撞积液冷却行为。试验结果表明，排气系数随鼓风比的增加而增大。积液孔-孔间距对排出系数有影响，并且随着积液孔-孔间距的增加，排出系数通常降低。吹风比极大地影响了冷却性能。较大的吹风比有利于改善冷却性能。首先，在弯曲的积水壁处，冷却效率缓慢增加，并在子序列中保持稳定值。但是，对于弯曲的积液壁的后端，其缓慢减小。随着积液孔角度的减小和积液孔与孔之间的间距的减小，冷却效率提高。同时，鼓风比，出水角度和出水孔距对排液系数有明显影响。

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