处理机匣对风扇稳定性影响的数值研究  

Numerical Analysis of Effect of Casing Treatment on Fan Stability

作　　者：蒋永松[1,2] 杨琳[1] 王咏梅[1] 

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]中航工业沈阳发动机设计研究所,沈阳110015

出　　处：《航空发动机》2011年第4期24-28,32,共6页Aeroengine

摘　　要：在对驻室式处理机匣内部流动及扩稳机理进行数值研究[1]基础上,采用数值模拟方法进一步分析处理机匣对风扇性能的影响。通过取消处理槽上方的驻室,提高了处理机匣对设计转速的扩稳能力。根据叶尖间隙内的相对速度分布和处理机匣内的回流量,分析了处理机匣的扩稳特性。研究结果表明:处理机匣产生扩稳作用的原因在于处理机匣能使转子叶尖进口气流加速,增加流体能量,从而抑制由叶尖泄漏流发展成泄漏涡,进而改善流动环境。Based on the numerical study of internal flow and steady expansion mechanism in the chamber casing treatment, a further analysis of the influence of the casing treatment on the performance of a fan had been carried out by numerical simulation. The improvement of the stability was enhanced at design speed without the plenum chamber above the slots. According to the relative velocity in the tip clearance and the mass flow rate in the casing treatment, the steady expansion characteristics of the casing treatment were analyzed. The results indicate that the casing treatment forms a path through which the blockage flow is sucked in and then blown out with high velocity at the front of the casing treatment. This process will suppress the tip leakage flow and the related vortex, and then improve the stability of the compressor.

关 键 词：处理机匣 风扇 数值模拟 稳定性 航空发动机 

分 类 号：V235.113[航空宇航科学与技术—航空宇航推进理论与工程]