弯叶片对压气机静叶根部间隙泄漏流动的影响  

Effect of Curved Blade on Leakage Flow in the Gap of Compressor Stator Hub

作　　者：杜鑫[1] 王松涛[1] 王仲奇[1] 

机构地区：[1]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》2010年第1期16-21,共6页Power Engineering

基　　金：国家高技术研究发展计划863资助项目(2008AA5A302);国家重大基础研究发展计划973资助项目(2007CB210104)

摘　　要：研究了弯叶片对压气机静叶根部泄漏流动的影响机理.对比分析了采用弯叶片后,根部间隙泄漏涡的运动轨迹、旋涡强度的差异以及对吸力面附面层发展的影响;从根部最大负荷位置以及逆压梯度等参数的变化,分析了造成泄漏流动变化的原因;从出口截面的轴向速度分布以及出口气流角沿叶高分布的变化,分析了静叶根部采用弯叶片后对流动匹配的影响.结果表明:正弯叶片使泄漏涡强度减弱,提高了下端壁的通流能力,改善了静叶出口气动参数的均匀性,减少了能量损失,尤其是使近端壁处轴向速度增大,有利于原型压气机根部的流动匹配.The mechanism has been studied for the effect of curved blade on leakage flow at compressor stator hub. The difference of leakage vortex track and leakage vortex intensity in the hub gap was compared before and after the application of curved blade, while their corresponding effects on boundary layer devel- opment of the suction surface analyzed. The reason causing the variation of leakage flowing was studied according to the position that the maximum load occurred and the variation of the parameters such as the ad- verse pressure gradient at stator hub. The distribution of the axial velocity and the flow angle at stator outlet along the blade height were studied to discuss the curved blade effect on the flow-matching at the stator hub. Results show that positive curved blades can decrease the leakage vortex intensity, enhance the flow capacity at the hub area, improve the uniformity of the outlet aerodynamic parameters, reduce the energy loss, and especially increase the axial velocity near the end wall which offered great benefit to the flow-matching near the hub in the original compressor.

关 键 词：压气机 静叶根部间隙 泄漏流 弯叶片 

分 类 号：TK474.81[动力工程及工程热物理—动力机械及工程]