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本文实验研究了采用直、弯静叶的某重复级低速压气机在不同时序位置时的总性能及横截面流场特性。在不同流量工况下对压气机整体性能及流场进行了详细测量。结果表明,采用正弯静叶的压气机时序效应相对较弱且喘振裕度有所增加;同时,在压比略有减小的前提下(0.1%级别),凭借消耗扭轴功的大幅下降(3%左右),效率在设计工况下最大可提高约1%。设计工况下,压气机静叶流道内存在两个主要的旋涡结构,分别为刮削涡和上通道涡。直静叶流道中的刮削涡尺度明显大于正弯静叶流道中,受前级静叶尾迹干涉影响较大,体现了更强的时序效应;近堵塞工况下,直静叶中刮削涡尺度明显增大而正弯静叶中基本不变;近失速工况下分离严重,旋涡随之消失。
In this paper, the total performance and cross-sectional flow field characteristics of a repetitive low-speed compressor with straight and curved vanes at different time-series positions are experimentally studied. Under different flow conditions, the overall performance of the compressor and flow field were measured in detail. The results show that the timing effect of the compressor with positive cambered leaves is relatively weak and the surge margin is increased. Meanwhile, with the slight decrease of pressure ratio (0.1%), Decline (about 3%), the maximum efficiency in the design conditions can be increased by about 1%. Under design conditions, there are two main vortex structures in the compressor vane flow path, namely the vortex scraping vortex and the upper channel vortex. The scrolling vortex scale in the straight vane flow channel is obviously larger than that in the positive vane flow channel, which is greatly influenced by the interference of the fore vane vortex trail, which shows a stronger timing effect. In the near jam condition, Obviously increased and is basically unchanged in the curved leaves; under severe stalling conditions severely separated, vortex disappear.