低速轴流压气机叶尖非定常流动试验

发布时间：2018-01-16 06:00

本文关键词：低速轴流压气机叶尖非定常流动试验　出处：《航空学报》2016年08期 　论文类型：期刊论文

【摘要】：利用动态压力传感器对一低速轴流压气机转子的叶顶间隙流场进行详细的试验测量,通过对信号特征的分析,对压气机节流过程中叶顶间隙的非定常流动发展演变规律进行了研究。结果表明:压气机完全失速时,叶尖存在一以46.5%转子转速周向传播的失速团;节流过程中,叶尖前缘处的动态压力信号中存在非定常波动的特征频率带,其变化规律与叶顶流场压力非定常波动的能量迁移有关;随着压气机流量减小,叶顶泄漏流影响区域向前缘移动,失速团在叶顶前缘附近产生,并向尾缘方向扩展,最终覆盖叶片全部弦长;近失速工况时,叶顶间隙相邻通道内泄漏流相互作用,造成通道中的低压区"一前一后"交替分布从而形成一个空间上周期约2个叶片通道的扰动波。
[Abstract]:The flow field of the blade tip clearance of a low speed axial compressor rotor was measured by dynamic pressure sensor in detail, and the signal characteristics were analyzed. The evolution law of unsteady flow of tip clearance in throttling process of compressor is studied. The results show that when compressor stall completely, there is a stall mass propagating at 46.5% rotor speed circumferential direction. In the process of throttling, there is a characteristic frequency band of unsteady fluctuation in the dynamic pressure signal at the leading edge of the tip of the blade, which is related to the energy migration of the unsteady fluctuation of the pressure in the tip flow field. With the decrease of compressor flow rate, the tip leakage flow affects the front edge of the blade and the stall mass occurs near the front edge of the blade top and extends to the tail edge, finally covering all the chord lengths of the blade. Under the condition of near stall, the leakage flow in the adjacent channel between the top clearance of the blade interacts with each other, which results in the alternating distribution of the low-pressure region in the channel, thus forming a disturbance wave of about two blade channels in a space.
【作者单位】：西北工业大学动力与能源学院;先进航空发动机协同创新中心;
【基金】：国家自然科学基金(51236006,51476132)~~
【分类号】：V231.3
【正文快照】： 网络出版地址:www.cnki.net/kcms/detail/11.1929.V.20160412.1305.002.html引用格式:高丽敏,李永增,刘晓东,等.低速轴流压气机叶尖非定常流动试验[J].航空学报,2016,37(8):2614-2622.GAO L M,LIY Z,LIU X D,et al.Test of unsteady flow in the tip clearance of low speed a

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