航空学报2025，Vol.46Issue(2)：114-131,18.DOI:10.7527/S1000-6893.2024.30547
亚声速压气机平面叶栅风洞标准模型建立
Establishment of standard model of linear cascade wind tunnel for subsonic compressor
摘要
Abstract
The standard model for linear cascade wind tunnel is the key to the construction of axial compressor design system and the standardization of linear cascade testing technique.The standard model of compressor cascade with a typical controlled diffusion airfoil is designed and tested based on the linear cascade wind tunnel of Northwestern Poly-technical University.The flow quality of the standard cascade including inflow precision,flow periodicity,and two-dimensionality is adjusted by a self-established integrated control system.On the basis of ensuring the flow quality,the performance of the standard cascade is measured,including the features of incidence and axial velocity density ra-tio,as well as the distributions of surface isentropic Mach number and wake,and is then compared to the reference cascade data published by DLR.The results show that the standard cascade exhibits good flow periodicity and accu-racy,including a uniform region over four successive blade passages upstream and a periodicity range over two suc-cessive blade passages downstream,and the periodicity index of outflow is less than 2.The deviation of the inlet Mach number and axial velocity density ratio in the measuring blade passage is no more than 0.005 and 0.02,re-spectively.The comparison with the reference cascade data shows that the variation laws of the loss,exit flow angle and static pressure ratio with the inlet flow angle are essentially the same between the standard cascade and reference cascade at the design inlet Mach number of 0.62.The loss and exit flow angle of the standard cascade are larger than those of the reference cascade due to the difference of measuring position downstream of cascade,but the static pres-sure ratio is basically the same.The distributions of the surface isentropic Mach numbers for the two sets of cascades are highly consistent.In general,the test data for the established standard cascade are comprehensive and reliable.关键词
平面叶栅/风洞试验/标准模型/压气机叶栅/轴向密流比/周期性/二维性Key words
linear cascade/Wind tunnel test/standard model/compressor cascade/axial velocity density ratio/periodicity/two-dimensionality分类
航空航天引用本文复制引用
蔡明,高丽敏,李瑞宇,欧阳波,刘波..亚声速压气机平面叶栅风洞标准模型建立[J].航空学报,2025,46(2):114-131,18.基金项目
国家自然科学基金(92152301) （92152301）
国家科技重大专项(2017-Ⅱ-0001-0013) National Natural Science Foundation of China(92152301) （2017-Ⅱ-0001-0013）
National Science and Technology Major Project of China(2017-Ⅱ-0001-0013) （2017-Ⅱ-0001-0013）
