基于振动时滞法的非零叶间相位角叶片颤振

杜云祥; 徐自力; 焦玉雪

doi:10.13224/j.cnki.jasp.2020.08.020

基于振动时滞法的非零叶间相位角叶片颤振

doi: 10.13224/j.cnki.jasp.2020.08.020

基金项目: 国家自然科学基金（51675406）

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出版历程
- 收稿日期: 2020-01-03
- 刊出日期: 2020-08-28

Blades flutter of non-zero inter-blade phase angle based on vibration time-delay method

State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China

摘要

摘要: 发展了一种利用叶片延迟振动设置叶间相位角的振动时滞法和多通道叶片非同相振动的流固耦合颤振分析模型。模型通道数选取相邻节径线之间通道数的两倍,在循环扇区的不同通道中,令叶片的各阶振动模态位移滞后于前一叶片,结合基于虚拟弹性体的快速动网格算法实现流场及叶片网格的高效更新。针对Rotor 37多通道模型,研究了不同叶间相位角对叶片气弹稳定性及通道流场特性的影响。结果表明:多通道方法与全环叶片颤振分析的计算结果基本一致,而18节径振动下多通道方法的计算时间是全环分析的1486%;节径振动形式对气动阻尼有显著影响,且在2节径时发生气弹失稳;叶间相位角引起流道内激波位置和强度变化和非定常激波脉动异相冲击,是影响颤振的主要原因。
- 叶片颤振 /
- 流固耦合 /
- 叶间相位角 /
- 振动时间延迟 /
- 多通道方法
Abstract: A vibration time-delay method of setting inter-blade phase angle by means of delayed blade vibration and a fluid-structure interaction flutter analysis model for multiple passage blade non-in-phase vibration were developed. The number of passages was twice the passages between adjacent nodal lines; and in the different passages of the cyclic sector, the modal displacement of each blade lagged behind that of the previous blade, and the efficient update of the flow field and blade grids was realized using the fast dynamic mesh algorithm based on pseudo elastic solid. Based on the multiple passage model of Rotor 37, the influences of different inter-blade phase angles on the aerodynamic stability of blades and the flow field characteristics of passages were studied. The results showed that the calculation result of the multiple passage method was basically consistent with the full annulus flutter analysis, and the calculation time of the multiple passage method was 1486% of the full annulus analysis at 18 nodal diameter. Nodal diameter pattern had a significant influence on the aerodynamic damping of blades, and flutter instability occurred at 2 nodal diameter. The inter-blade phase angle led to the changes of the shock wave location and strength and the unsteady pulsation and impact out of phase in the passage, contributing a lot to the flutter.
- blade flutter /
- fluid-structure interaction /
- inter-blade phase angle /
- ,vibration time-delay /
- multiple passage method

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