二维叶栅气固耦合颤振分析

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

1.
School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China
2.
School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China

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。
- 航空、航天推进系统 /
- 气固耦合 /
- 振动叶栅 /
- 颤振 /
- 折合频率
Abstract: 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.
- aerospace propulsion system /
- gas-solid coupled /
- oscillating cascade /
- flutter /
- reduced frequency

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