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Title: Optimal Design Criteria of Tandem Configuration for High-Load Compressor Cascades
题目：高负荷压气机串列叶栅配置参数的最优设计准则研究
Authors: MAO Xiaochen,JIAOYingchen,CHENG Hao, ZHANG Botao, LIU Bo
作者：茅晓晨，焦英辰，程昊，张博涛，刘波
单位：西北工业大学动力与能源学院；空气动力学设计与研究国家重点实验室；西安热工院；
Journal of Thermal Science, 2024, 33(6): 2047-2058.
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摘要
Abstract: Axial overlap (AO) and percent pitch (PP) are considered as key position configuration parameters that affect the tandem cascade performance. The objective of the current study is to investigate the optimal design criteria for these two parameters in tandem cascades of subsonic highly-loaded two-dimensional compressors. Before that, the influence mechanisms of AO and PP are explored separately. Research results show that higher PP is beneficial for decreasing rear blade (RB) load, but an invalidity of gap flow occurs when it approaches 1. The change in AO has an influence on the adverse pressure gradient of the front blade (FB), and it also affects the gap flow strength and FB wake development. Then, the optimal design criteria for AO and PP are obtained in a large design space, which clarifies the matching relationship of the two parameters at different operating conditions. The best global range of AO is about −0.05 to 0.05 while PP is between 0.85 to 0.92, and PP should be smaller to avoid performance degradation as AO increases. According to the fault tolerance in practical applications, PP should be closer to the lower bound to ensure that the deterioration boundary is wide enough.
摘要：轴向重叠度和（AO）和节距比（PP）是影响串列叶栅性能的关键配置参数，本文探索了亚声速条件下高负荷压气机串列叶栅AO和PP的最佳设计准则，并分析了每个参数对其内部流场结构的影响机制。研究结果表明，较大的PP有利于降低串列叶栅后叶载荷，但当其大于某一阈值时会造成间隙射流失效。AO的改变会影响前叶吸力面的逆压梯度，同时会改变间隙射流强度和前叶尾迹的发展。之后，本文在较大的设计空间内分析了不同AO和PP组合下的串列叶栅性能变化规律，阐明了不同工况下两个参数的最优匹配关系。AO的最佳取值范围约为-0.05至0.05，PP为0.85至0.92，当AO增大时，PP应适当减小，以保证性能稳定。
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引用格式
MAO Xiaochen, JIAO Yingchen, CHENG Hao, ZHANG Botao, LIU Bo, Optimal Design Criteria of Tandem Configuration for High-Load Compressor Cascades, Journal of Thermal Science, 2024, 33(4): Journal of Thermal Science, 2024, 33(6): 2047-2058.
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