本文采用数值模拟的方法对凹槽叶顶前缘气膜孔的位置进行了研究,通过改变前缘第一气膜孔位置来分析叶顶区传热。数值模拟结果表明,由于冷却气对该区域没有提供足够的保护,肩壁表面的平均绝热效率远低于凹槽底面,平均传热系数远高于凹槽底面。叶顶第一气膜孔向前缘移动使肩壁表面的平均传热系数先升高再降低,叶顶前缘低绝热冷却效率区逐渐消失。
In the present paper,the influence of hole site on heat transfer characteristics is numerically studied by changing one film cooling hole location.The results indicate that the area averaged film cooling effectiveness on rim surface is lower than that on groove floor,while the area averaged film cooling heat transfer coefficients on rim surface is higher than that on groove floor.When the single hole location moves to leading edge,the heat transfer coefficients increase firstly,then decrease,and the lower zone of film cooling effectiveness fades away.
参考文献
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