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本文通过数值模拟方法对凹槽叶顶区的气膜孔的位置进行了研究,通过将一个下游气膜孔布置在叶顶前缘来研究气膜孔位置对叶顶区传热的影响。数值模拟结果表明,下游区气膜孔被布置到前缘区,改善了叶顶前缘的低绝热冷却效率区,获得了均匀的气膜保护,同时对下游区的气膜冷却效率影响不大,无论是放在前缘第一气膜孔上游还是靠近吸力边布置,下游区绝热效率和平均传热系数几乎不受该气膜孔在前缘位置的影响。
In this paper, the position of the film hole in the tip of the groove is studied by means of numerical simulation. The influence of film hole position on the heat transfer in the tip area is studied by arranging a downstream film hole in the leading edge of the blade. The numerical simulation results show that the gas film holes in the downstream zone are arranged in the leading edge zone, which improves the low adiabatic cooling efficiency zone at the leading edge of the blade tip and achieves uniform gas film protection with little effect on the film cooling efficiency in the downstream zone , Whether placed on the upstream side of the first film hole or close to the suction edge, the thermal insulation efficiency and the average heat transfer coefficient in the downstream area are hardly affected by the position of the film hole at the leading edge.