Statistics on aerodynamic sensitivities of blade geometric errors for transonic compressor rotor

被引：0
|
作者：
Ma F. [1 ,2 ]
Shang X. [1 ]
Liu H. [1 ]
Wang Y. [1 ]
Chen W. [1 ]
Du Y. [1 ]
机构：
[1] School of Power and Energy, Northwestern Polytechnical University, Xi’an
[2] Aviation Power Company Limited, Aero Engine Corporation of China, Xi’an
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2023年 / 38卷 / 10期
关键词：
aerodynamic sensitivity; correlation coefficient analysis; geometric error; non-uniform rational B-splines (NURBS) surface; transonic compressor rotor;
D O I：
10.13224/j.cnki.jasp.20210644
中图分类号：
学科分类号：
摘要：
In order to study the sensitivity of the aerodynamic performance of a transonic compressor rotor to different types of geometric errors， NASA Rotor 37 was selected as the research object. The non-uniform rational B-splines (NURBS) surface algorithm and genetic algorithm were used to parameterize the three-dimensional blade surface. A total of 26 geometric errors，including the sweeping error and skewing error，were considered and extracted for the 3D rotor blade. 800 samples were generated by uniform Latin hypercube sampling in association with Monte Carlo algorithm. The loss characteristic and flow structure of Rotor 37 were obtained by steady CFD numerical simulation. Spearman rank correlation and expectation curve analysis were used to investigate the nonlinear relationship between geometric deviations and aerodynamic parameters at two typical working conditions. The flow mechanism analysis was carried out on the most sensitive geometric error model of efficiency under different working conditions. Results indicated that leading-edge profile factor of midspan had the greatest negative effects on rotor efficiency; while suction profile factor near shroud was most negatively correlated with pressure ratio at choke point. As for peak efficiency point，suction profile factor of midspan had the most obvious negative influence on rotor efficiency and pressure ratio. Regarding to near stall point， suction profile factor of midspan had great negative correlation with rotor efficiency. Trailing-edge profile factor of midspan was great positively correlated with pressure ratio. © 2023 BUAA Press. All rights reserved.
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页码：2483 / 2500
页数：17
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