轴流/离心组合压气机一体化设计及数值模拟  

Integrative Design and Numerical Simulation of Axial/Centrifugal Combined Compressor

作　　者：高丽敏[1] 高磊[1] 祝启鹏[1] 

机构地区：[1]西北工业大学动力与能源学院先进航空发动机协同创新中心,陕西西安710072

出　　处：《风机技术》2016年第1期41-49,共9页Chinese Journal of Turbomachinery

基　　金：陕西省自然科学基金(2014JM7248);国家自然基金(51236006)

摘　　要：为了更好地解决轴流级与离心级间的匹配问题,采用了一体化设计方法对组合压气机进行设计。为了一体化设计,发展了准正交曲线坐标系下的叶片力分解方法,得到了适合于轴流、离心压气机一体化求解的速度梯度方程;根据轴流级和离心叶轮的特点,整理发展了各自相应的损失模型,最终形成了组合压气机流场一体化通流计算方法。以某一级轴流加一级离心的组合压气机级为研究对象进行了通流设计、三维成型和数值模拟分析;将一体化设计方案1A1C_COM对应的结果与原轴流级和离心级单独设计方案对应的结果1A1C_SEP进行了比较分析。结果表明,相比之下,一体化设计的组合压气机整体性能较好,改善了离心叶轮内部的流动,性能得到了一定的提升。For the purpose of matching the axial and centrifugal compressor perfectly,an integrative design method was taken to design the axial/centrifugal combined compressor. For the purpose of establishing an integrative design method, the blade force term is decomposed along a quasi-orthogonal direction so that a control momentum equation suitable for axial radial combined compressors is then obtained. In order to account for the rise of entropy from fluid viscosity, loss models are selected considering the special features of axial and radial stages and an integrative through-flow calculation method for combined compressor flow field is finally formed. Moreover, an axial-radial combined stage is designed using this method and 3D N-S analysis is then carried out by commercial CFD tools. By comparing the integrative design results with that which the axial stage and radial stage is designed separately, it is found that the former shows better overall characteristics and the flow in the radial stage is improved.

关 键 词：组合压气机 损失模型 一体化设计 叶片力 

分 类 号：TH452[机械工程—机械制造及自动化]