A Model to Predict Stall Inception of Axial Flow Fan / Compressors with Annular Duct
A three dimensional compressible flow stability model is presented in this paper, which focus on multi-stage axial flow compressors with a finite large radius annular duct configuration. It is shown that under some assumption the perturbation field is described by linearized Euler equations, which can be solved by mode decomposing plus appropriate boundary condition. Further by using the mode-matching technique and applying the conservation law and conditions reflecting the loss characteristics of a compressor at the two sides of rotors and stators modeled as a series of actuator disks, a group of homogeneous equations will yield from which the stability equation can be obtained. After solving the eigenvalue problem by collocation method, the stability can be judged by the nondimensional imaginary part of the resultant complex frequency eigenvalue. Finally, two numerical evaluation cases are conducted to validate this model.
compressor stability eigenvalue
Xiaohua Liu Dakun Sun Xiaofeng Sun
Fluid and Acoustic Engineering Laboratory Beijing University of Aeronautics and Astronautics Beijing, P.R.China
国际会议
The 3rd International Symposium on Jet Propulsion and Power Engineering(第三届喷气推进与动力工程国际会议 ISJPPE)
南京
英文
236-243
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）