摘要
本文以某离心压气机为研究对象,开展非定常数值模拟,深入探索离心叶轮和径向扩压器之间的非定常干涉效应,以及产生的周向流场畸变在径向扩压器和回流器内的传播特征。研究表明:径向扩压器对离心叶轮的影响主要体现在势作用上,扩压器的势干扰使得叶轮出口静压发生周期性变化,进而引起叶轮后部负荷等也产生周期性变化;在离心叶轮的作用下,扩压器进口气流角分布呈现较强的非定常性,影响范围覆盖了整个扩压器通道;径向扩压器流场中的畸变区域,沿周向朝压气机转动相反的方向旋转。
To further explore the unsteady interfering effect of centrifugal impellers and radial diffusers and the transformation of the distortion,the unsteady numerical simulation of a centrifugal compressor is presented in this paper.The research shows,that the impact of diffuser on the centrifugal impeller is imposed through the potential field,which causes periodic variation of the static pressure as well as blade loading at the outlet of the impeller;l moreover,under the influence of the impeller,the area of influence covers the entire diffuser channel;the distorted region in the radial diffuser flow field,rotates circumferentially in the opposite direction to the compressor rotation.
作者
杨晰琼
李杜
张锦纶
贺丹
Xi-qiong Yang;Du Li;Jin-lun Zhang;Dan He(AECC Hunan Aviation Powerplant Research institute;Hunan Key Laboratory of Turbomachinery on Small and Medium Aero-Engine)
出处
《风机技术》
2022年第3期17-23,共7页
Chinese Journal of Turbomachinery
基金
湖南省科技创新人才计划科技领军人才项目(2020RC4035)。
关键词
离心叶轮
径向扩压器
非定常干涉
势作用
周期性
Centrifugal Impeller
Radial Diffuser
Unsteady interference
Potential Field
Periodic
