航空学报 > 2014, Vol. 35 Issue (7): 1874-1881   doi: 10.7527/S1000-6893.2013.0509

动/动干涉效应对叶片非定常负荷的影响

高丽敏, 苗芳, 李瑞宇, 刘波   

  1. 西北工业大学 动力与能源学院, 陕西 西安 710072
  • 收稿日期:2013-10-25 修回日期:2014-01-02 出版日期:2014-07-25 发布日期:2014-01-17
  • 通讯作者: 高丽敏,Tel.:029-88495022E-mail:gaolm@nwpu.edu.cn E-mail:gaolm@nwpu.edu.cn
  • 作者简介:高丽敏女,博士,教授。主要研究方向:航空与民用叶轮机械复杂流场及气动性能的数值仿真及测量技术、高效节能叶轮机械设计、计算流体力学理论及其在复杂结构中的工程应用、流动显示技术等。Tel:029-88495022E-mail:gaolm@nwpu.edu.cn;苗芳女,硕士。主要研究方向:叶轮机械非定常流场数值模拟。Tel:029-88495022E-mail:miaofangletter@126.com
  • 基金资助:

    国家自然科学基金(51076132)

Effect of Rotor/rotor Interactions on Blades Unsteady Loading

GAO Limin, MIAO Fang, LI Ruiyu, LIU Bo   

  1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2013-10-25 Revised:2014-01-02 Online:2014-07-25 Published:2014-01-17
  • Supported by:

    National Natural Science Foundation of China (51076132)

摘要:

采用非定常数值模拟的方法研究了设计工况下对转压气机内部的非定常流动机理,着重分析对转压气机内部两排转子之间动/动干涉效应对叶片非定常负荷的影响。研究表明:对转环境下,下游转子的势流干扰造成上游转子压力面的强非定常性,而在上游转子尾迹和势流干扰的影响下,下游转子叶片前缘非定常性极强,相比叶片其他区域非定常强度不是很高,并且从频谱分析的角度证实了两排转子之间的相互影响,反向旋转造成叶片表面压力脉动频率加倍;分析两排转子叶片表面的气动力可知,下游转子的势流干扰对上游转子造成的影响略微强于上游尾迹和势流对下游转子的影响,并且两排转子之间的相对位置对叶片所受非定常气动力存在一定的影响。

关键词: 对转压气机, 动/动干涉, 非定常性, 数值模拟, 设计工况

Abstract:

A time-accurate simulation is performed to investigate the unsteady flow field of two counter-rotating rotors under design conditions in the present paper with emphasis on the unsteady effect of the rotor/rotor interactions on rotor blades. The results indicate that with a counter-rotating pattern, the strong unsteadiness of the upstream rotor on its pressure surface is caused by the potential repercussion of the downstream rotor, and the upstream wakes and potential interference are the main causes for the strong unsteadiness of the downstream rotor, especially for its blade leading region. Furthermore, the interaction between the two rotors is testified by the frequency analyzing method. The counter-rotating pattern leads to the doubling of pressure fluctuation frequency on the blade surfaces. Meanwhile, by analyzing the aerodynamic force on the blade surfaces, the effect of potential repercussion on the upstream rotor is found stronger than the influence of the upstream wake and potential interference on the downstream rotor; the relative positions between the two rotors also have some influence on the aerodynamic force of each rotor.

Key words: counter-rotating compressor, rotor/rotor interactions, unsteadiness, numerical simulation, design conditions

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