激波对跨声速风扇叶片颤振特性的影响

推进技术 ›› 2016, Vol. 37 ›› Issue (3): 411-418.

激波对跨声速风扇叶片颤振特性的影响

张翔,黄秀全,张恒铭,陈玉春

西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072

发布日期:2021-08-15
作者简介:张翔，男，博士生，研究领域为叶轮机械内气体动力学。E-mail: zhangxb.no1@163.com 通讯作者:黄秀全，男，副教授，研究领域为叶轮机械内气体动力学。
基金资助:
国家自然科学基金(50706039)；航空科学基金(2012ZB53022)。

Effects of Shock Wave on Blade Flutter Characteristics in Transonic Fan

School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China and School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究激波对叶片气动弹性稳定性的影响，基于谐波平衡计算方法，结合结构动力学分析，采用单向耦合方式下的能量法对跨声速风扇的颤振特性进行了数值研究。计算结果表明:设计点工况下，二阶弯曲模态时叶片的最小气动阻尼系数小于0，数值为-0.338%，意味着叶片存在失稳风险；此外，100%等转速线不同工况下叶片的颤振特性不尽相同，激波位置变化对气流做功的影响是导致叶片气动弹性稳定性差异的主要诱因。

关键词: 叶片颤振；激波；非定常流；能量法

Abstract: In order to investigate effects of shock wave on blade aeroelastic stability，based on harmonic balance computation technique with structure dynamics analysis method，the flutter characteristics of transonic fan is numerically simulated through energy method in one-way coupling manner. The results show that the minimum value of aerodynamic damping coefficient was -0.338% for the second bending mode on the design point，less than 0，meaning an existence of instability risk for the blades. Furthermore，the blade flutter characteristics is found to be not always identical under different working conditions in 100% rotating speed line. The effect on aerodynamic work from change of shock wave position is a main inducement leading to the difference of blade aeroelastic stability.

Key words: Blade flutter；Shock wave；Unsteady flow；Energy method

张翔,黄秀全,张恒铭,陈玉春. 激波对跨声速风扇叶片颤振特性的影响[J]. 推进技术, 2016, 37(3): 411-418.

ZHANG Xiang,HUANG Xiu-quan,ZHANG Heng-ming,CHEN Yu-chun. Effects of Shock Wave on Blade Flutter Characteristics in Transonic Fan[J]. Journal of Propulsion Technology, 2016, 37(3): 411-418.

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