二维叶栅气固耦合颤振分析  

Flutter Analysis of 2-D Cascades under Gas-Solid Coupled Conditions

作　　者：肖军[1] 周新海[2] 谷传纲[1] 戴正元[1] 王彤[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030 [2]西北工业大学动力与能源学院,陕西西安710072

出　　处：《航空动力学报》2006年第1期106-111,共6页Journal of Aerospace Power

摘　　要：引入叶片结构动力学方程,通过数值求解气动/结构耦合方程体系,研究了气固耦合条件下叶栅内的二维非定常粘性流动,并初步进行了叶栅的颤振分析。针对两种叶型分别计算了不同折合频率下的流场,通过比较振动叶栅相关参数随时间变化的曲线,表明折合频率是决定叶片颤振与否的重要因素。The structural dynamic equations for blades were introduced in this paper. Through numerical solving the aerodynamics-structure coupled equations ,a 2-D unsteady viscous flow in cascade was investigated under gas-solid coupled conditions, and a preliminary analysis of the cascade flutter was prosecuted. The flows of different reduced frequencies were computed for two blade profiles respectively. By comparing the relative parameters changing with time in the oscillating cascades under different conditions, it indicates that the reduced frequency is an important factor in determining whether the blade flutter onsets or not.

关 键 词：航空、航天推进系统 气固耦合 振动叶栅 颤振 折合频率 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]