叶片弯曲对大折转压气机叶栅内分离结构的影响

推进技术 ›› 2007, Vol. 28 ›› Issue (1): 36-39.

叶片弯曲对大折转压气机叶栅内分离结构的影响

张华良,王松涛,王仲奇

哈尔滨工业大学能源科学与工程学院黑龙江哈尔滨150001;哈尔滨工业大学能源科学与工程学院黑龙江哈尔滨150002;哈尔滨工业大学能源科学与工程学院黑龙江哈尔滨150003

发布日期:2021-08-15

Effect of bowed blades on the separation structures in high-turning compressor cascades

School of Energy Science and Engineering,Harbin Inst.of Technology,Harbin 150001,China;School of Energy Science and Engineering,Harbin Inst.of Technology,Harbin 150002,China;School of Energy Science and Engineering,Harbin Inst.of Technology,Harbin 150003,China

Published:2021-08-15

摘要/Abstract

摘要： 通过数值模拟,分析了叶片周向弯曲对大折转角压气机叶栅内分离结构的影响。弯角分别为±10°,±20°,±30°。应用壁面流谱的拓扑法则,详细讨论了不同弯角下的分离形态。结果表明,正弯可以有效遏止角区分离,改变吸力面的分离形态,但不能完全消除吸力面的分离。因此一定范围内的叶片正弯可以改善流动,但当弯角大于20°时,流动重新恶化。反弯则使得叶栅内分离趋势增加,气动性能明显降低。

关键词: 大折转角+;分离结构+;周向弯曲+;拓扑+

Abstract: A numerical simulation was performed to analyze the effect of bowed blades on the separation structures in a high-turning compressor cascade.The bowed angles were ±10°,±20°,±30° respectively.Using the topological rules of the surface flow pattern,the separation configurations on the suction surface at different bowed angles is discussed.The results show that a positive bowed blade can restrain the corner separation and change the separation configuration,while it can not avoid the flow separation on the suction surface.So,although a positive bowed blade with a small angle can improve the flow performance,the flow becomes worse again when the positive bowed angle exceeds 20°.A negative bowed blade increases the flow separation and the flow performance is reduced remarkably.

Key words: High-turning+;Separation structure+;Bowed cascade+;Topology+

张华良,王松涛,王仲奇. 叶片弯曲对大折转压气机叶栅内分离结构的影响[J]. 推进技术, 2007, 28(1): 36-39.