Effect of Moving Endwall on Hub Leakage Flow of Cantilevered Stator in a Linear Compressor Cascade  

作　　者：ZHENG BIAOJIE MA YUCHEN TENG JINFANG JU ZHENZHOU ZHU MINGMIN 郑标颉;马宇晨;滕金芳;居振州;朱铭敏(School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Journal of Shanghai Jiaotong university(Science)》2022年第6期780-789,共10页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52076129 and 51576124);the National Science and Technology Major Project(No.2017-II-0004-0017)。

摘　　要：The cantilevered stator has the advantages of reducing mass and axial length of highly loaded com-pressor.The details of the hub leakage flow resulting from the clearance between the high-speed moving hub and the cantilevered stator hub are unclear.In this paper,the effect of a moving endwall on the hub leakage flow of a cantilevered stator in a linear compressor cascade was studied.After the simulation method was verified with the experimental results,the time-averaged results of unsteady Reynolds averaged Navier-Stokes(URANS)were selected to study a case with a hub clearance of 2 mm.The results show that the effect of the moving endwall of the cantilevered cascade on the general characteristics with below 30%span increases the leakage mass flow rate and reduces the static pressure coefficient at three conditions of 0°,6°,and-7°incidences,and the change is most significant at-7°incidence.The effect of the moving endwall on the total pressure loss coefficient varies with different operating conditions,which decreases by 15.94%at 0°incidence,and increases by 4.77%and 18.51%at 6°incidence and-7°incidence,respectively.The influence of the moving endwall is below 14%span at-7°incidence,below 23%span at 0°incidence,and below 30%span at 6°incidence.These effects correspond to the static pressure coefficient and the difference of static pressure coefficient representing the blade loading.In designing the cantilevered stator and matching between the stages of a multistage compressor,the quantitative research results of this paper have certain guiding significance.

关 键 词：COMPRESSOR cantilevered stator moving endwall aerodynamic performance hub leakage flow 

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]