流体机械2017，Vol.45Issue(11)：41-46,33,7.DOI:10.3969/j.issn.1005-0329.2017.11.008
非绝热壁面边界在离心压气机数值模拟中的应用
Application of Non-adiabatic Wall Boundary Condition in Numerical Simulation for Centrifugal Compressor
摘要
Abstract
With the improvement of stage load and temperature level of centrifugal compressor,in order to improve numerical simulation accuracy of centrifugal compressor,it's necessary to study the influence of non-adiabatic boundary condition on numerical simulation. In this work,numerical simulation of a well-designed active centrifugal compressor was carried out. Adiabatic and two widely used non-adiabatic boundary conditions,isothermal and heat transfer coefficient(HTC) imposed boundary conditions were employed. Numerical accuracy of non-adiabatic simulation was analysed in detail. Simulation with HTC imposed boundary condition reduces 46.6％ of error in efficiency at design point,in despite of the deviation of the HTC in a certain range. Detailed analysis shows that main difference between HTC imposed and adiabatic boundary conditions comes from tip loss related simulation. Numerical simulation with isothermal boundary condition shows that the efficiency error raises 93.2％ compared with adiabatic results because of the deviation of the reference temperature. Isothermal boundary condition is sensitive to the reference temperature,and thus the selection of reference temperature should be carefully considered in further study.关键词
离心压气机/数值模拟/非绝热边界/传热效应Key words
centrifugal compressor/numerical simulation/non-adiabatic boundary/heat transfer effect分类
机械制造引用本文复制引用
吴东润,滕金芳,羌晓青,马威..非绝热壁面边界在离心压气机数值模拟中的应用[J].流体机械,2017,45(11):41-46,33,7.
