端壁相对运动对压气机叶栅间隙流场影响的数值模拟  

Influence of Endwall Relative Movement on Tip Clearance Flow in a Compressor Cascade

作　　者：韩少冰[1] 钟兢军[1] 严红明[2] 

机构地区：[1]大连海事大学轮机工程学院,大连116026 [2]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《动力工程学报》2011年第4期257-262,共6页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51076018)

摘　　要：压气机端壁与叶片间的相对运动是影响叶顶间隙气流流动的重要因素.采用数值模拟的方法考察了端壁运动对不同叶顶间隙压气机叶栅内三维流场的影响.结果表明:端壁相对运动改变了叶栅间隙流场结构,叶栅通道内出现向相邻叶片压力面运动的刮削泄漏涡,上通道涡及叶顶分离涡受到抑制,叶尖负荷增大,间隙泄漏流量增加,叶栅总损失由于叶顶区掺混损失减少而减少.The relative movement between rotor and endwall of compressor is one of the most important factors that affect the tip clearance flow.Numerical simulation has been carried out to investigate the effect of endwall movement on the 3D flow field in a compressor cascade with different tip clearances.Simulation results show that when relative movement of endwall exists,the tip clearance flow field will be changed;scrapped tip leakage vortex appearing in the cascade passage will move toward the pressure surface of adjacent blade;both the upper passage vortex and the tip separation vortex are to be inhibited;the load near tip region will rise which may lead to increased tip leakage flow;the total loss of cascade shall drop due to reduced mixing loss in the clearance region.

关 键 词：压气机 叶顶间隙 端壁运动 数值模拟 

分 类 号：TK474.812[动力工程及工程热物理—动力机械及工程] V231.3[航空宇航科学与技术—航空宇航推进理论与工程]