尾流激振对转子叶片振动应力影响试验研究  

Experimental Investigation of the Influence of Wake Excitation on Vibration Stress of Rotor Blades

作　　者：向宏辉[1] 任铭林[1] 杜文军[1] 

机构地区：[1]中国燃气涡轮研究院,四川江油621703

出　　处：《燃气轮机技术》2010年第1期25-29,共5页Gas Turbine Technology

摘　　要：利用一台单级风扇试验件,通过对零级导叶尾流参数和转子叶片振动应力的测量,研究了尾流激振强度及叶片振动应力的变化特性,分析了零导安装角和零导与转子之间的轴向间距对转子叶片振动应力的影响。试验结果表明:等转速线上随工况点向失速边界移动时,零导总压损失系数急剧上升,转子叶片振动应力不断增大;打开零导安装角或减小零导与转子之间的轴向间距均能增大下游转子叶片的振动应力。The change characteristics of wake excitation strength and vibration stress were investigated by means of measurement of the wake parameters of inlet guide vanes（IGV） and vibration stress of the downstream rotor blades in a single stage axial flow fan rig. The influence of IGV stagger angle and the axial spacing between IGV and rotor blades on vibration stress was also analyzed. The experimen- tal results show that the total pressure loss coemeient of IGV increases rapidly and vibration stress of rotor blades enlarge when the working point moves towards the stall boundary at 47.9% design speed. Vibration stress of the downstream rotor blades can increase through opening IGV stagger angle or decreasing the axial spacing between IGV and rotor blades.

关 键 词：尾流激振 总压损失系数 轴向间距 振动应力 

分 类 号：TK477[动力工程及工程热物理—动力机械及工程]