An Off-Design Flow Angle Model Based on Average-Flow Theory and Wake Analysis  

作　　者：MAO Yinbo SU Xinrong YUAN Xin 

机构地区：[1]Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Journal of Thermal Science》2023年第2期729-738,共10页热科学学报（英文版）

基　　金：funded through the National Science and Technology Major Project(2017-Ⅲ-0009-0035);National Natural Science Foundation of China(Grant No.52276031)。

摘　　要：This paper presents a novel model for flow angles at off-design conditions.The model is based on energy conservation in turbomachinery.By the mean of average process,statistical properties of the wake profile are related to the flow angle and mainstream parameters;then by adopting the classic flow topology of behind-blade wakes,the effect of operating conditions is included in the plot and a model for flow angle is thus developed.The advantage of the model is that it can achieve off-design flow angle estimations with design flow characteristics and it is compatible with CFD-based throughflow methods.This model is then implemented into a standard CFD-based throughflow solver from the previous research to estimate off-design characteristics of blade rows with proper input-output strategies.Furthermore,the effect of loss upon flow angle is also modeled as corrections to the proposed model.The model is validated on a compressor stage and the results show promising accuracy for off-design flow angle estimations.

关 键 词：flow angle wake analysis THROUGHFLOW AERODYNAMICS 

分 类 号：O35[理学—流体力学] TH122[理学—力学]