首页> 外文会议>HTD-vol.376-1; ASME(American Society of Mechanical Engineers) International Mechanical Engineering Congress and Exposition; 20051105-11; Orlando,FL(US) >Influence Of Two Rows Compound and Simple Angle Holes In Inline And/Or Staggered On Film Cooling And Heat Transfer
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Influence Of Two Rows Compound and Simple Angle Holes In Inline And/Or Staggered On Film Cooling And Heat Transfer

机译:串联和/或交错排列的两排复合和简单角孔对薄膜冷却和传热的影响

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摘要

This paper describes the results of an experimental investigation into the effect of the mainstream flow history on the film cooling effectiveness and the heat transfer characteristics from the combination of one row of simple angle holes and one row of compound angle holes. The mainstream flow history includes: favorable pressure gradient factors in the range -1.11 x 10~(-6) to +1.11 x 10~(-6) and turbulence intensity in the range 0.3% to 4.7%. The presence of favorable pressure gradients in the flow reduces the film cooling protection of the surfaces from both compound angle holes or combination of simple and compound angle holes, while the presence of adverse pressure gradients increases the film cooling effectiveness at low blowing rate and decreases it at high blowing rate. Increasing the turbulence intensity reduces the film cooling effectiveness from compound angle holes or combination of simple and compound angle holes.
机译:本文描述了实验研究的结果,该研究是通过将一排简单角孔和一排复合角孔组合使用来研究主流流动历史对薄膜冷却效率和传热特性的影响。主流的流动历史包括:-1.11 x 10〜(-6)到+1.11 x 10〜(-6)的有利压力梯度因子,以及0.3%到4.7%的湍流强度。流体中有利的压力梯度的存在降低了复合角孔或简单和复合角孔的结合对表面的膜冷却保护,而不利的压力梯度的存在则在低吹速下提高了膜冷却效率并降低了膜冷却效率。高吹气率。湍流强度的增加降低了来自复合角孔或简单和复合角孔组合的薄膜冷却效率。

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