非线性谐波法在双级对转压气机中的进一步校检  

Further validation of NHM in two-stage counter-rotating compressor

作　　者：刘波[1] 王雷[1] 黄建[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《航空动力学报》2013年第6期1333-1341,共9页Journal of Aerospace Power

基　　金：国家自然科学基金(51236006)

摘　　要：以双级对转压气机为研究对象,在与试验结果及常规非定常方法对比的基础上,对新型非定常模拟方法——非线性谐波法(NHM)进行了时域和频域中的校检分析,探索其相比常规非定常方法的适用性.研究结果表明:非线性谐波法在设计工况下能够较为可靠地模拟确定应力的大小及其分布规律,具有较高的建模精度.对于近失速状态,由于流场中的固有周期性被破坏,导致非线性谐波法在该工况下不再适用,其与常规非定常模拟结果存在明显差异.The nonlinear harmonic method（NHM） has been used to examine and analyze the unsteady rotor-rotor interaction of the two-stage counter-rotating compressor.To validate the NHM simulation results,the predicted characteristics of aerodynamic parameters were compared with the measured data and rigorous full-annulus unsteady simulations at typical working conditions.Based on the NHM deterministic stresses have been post-processed to compare to the full-annulus simulation to analyze distinct sources of unsteadiness.The NHM deliver accurate results at design points compared to full annulus results.The limits of the NHM are reached as soon as rotating stall effects occur as the theory foundation of the NHM,Fourier transformation,is no longer valid.

关 键 词：非线性谐波法 对转 动-动干涉 确定应力 适用性 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]