不同雷诺数下机匣处理扩稳效果及机理研究  

Research on Compressor Stable Operating Range Improvement Mechanism of Casing Treatment at Different Reynolds Number

作　　者：穆利洪 龙双喜 黄纪新 王毅[2] 

机构地区：[1]广东惠州天然气发电有限公司,广东惠州516082 [2]中南大学航空航天学院,长沙410083

出　　处：《燃气轮机技术》2015年第2期50-56,共7页Gas Turbine Technology

摘　　要：针对某型风扇,本文设计了两种不同的轴向倾斜处理机匣结构ASSCT_L100和ASSCT_L50。利用三维数值模拟方法对两种不同轴向倾斜缝处理机匣结构与风扇转子通道之间的耦合流动进行了详细的数值模拟,研究了不同雷诺数对处理机匣结构扩稳效果的影响,揭示了不同雷诺数下机匣处理的扩稳机理。研究发现:雷诺数会影响处理机匣的扩稳效果,低雷诺数工作状况下,转子顶部通道叶片前缘压力面和叶片尾缘吸力面处均存在较大的低能流体,ASSCT_L100处理机匣能够同时改善通道内叶片前缘和尾缘的流动状况,能够有效改善叶片顶部流场状况,从而提高风扇转子的稳定工作裕度。To study the effects of Reynolds number on the casing treatment stability enhancement effect, a series of numerical simula- tions were performed for an axial compressor with two different axial skewed slots casing treatment ASSCT_L100 and ASSCT_L50, and the coupled flow of two different axial skewed slots casing treatment structure and compressor rotor channel were investigated in detail. Expanding the stability mechanism of machine casing treatment at different Reynolds numbers reveal. The simulation results indicate that low Reynolds number has an adverse effect on extending the stable operating range by casing treatment, there is a big low-energy fluid near the leading edge of pressure surface and the trailing edge of suction surface of rotor blade tip. ASSCT_L100 casing treatment can simultaneously improve the flow conditions of blade leading edge and trailing edge, therefore led to improving stability margin of the axial compressor rotor.

关 键 词：轴流压气机 低雷诺数 机匣处理 扩稳 

分 类 号：V231.9[航空宇航科学与技术—航空宇航推进理论与工程]