多级低反动度高负荷轴流压气机及其内部流动机理研究

本文提出了亚音速多级低反动度高负荷轴流压气机的设计概念,并对其可行性进行了理论分析.应用此设计概念,结合附面层抽吸技术,将某11级轴流压气机改为7级,并对具有典型流动特征的末两级进行了详细的数值模拟.数值模拟结果表明多级低反动度高负荷轴流压气机的设计概念是可行的.     

Simplification of the expansions of viscous terms in basic aerodynamic equations in non-orthogonal curvilinear coordinate system

The application of non-orthogonal curvilinear coordinate system to the calculation of the flow field inside the channel, with complex boundary geometry, can effectively simplify the work of designing the calculation program and improve the accuracy of calculation [1]. Therefore, it is obviously necessary to expand the viscous terms, i.e. viscous force, rate of work done by viscous stress and dissipation, in basic aerodynamic equations in the nonorthogonal curvilinear system [2]. However, each of these expansions consistes of tens or even hundreds of algebraic terms. The expansions of these three viscous terms discribed in this paper are considerably simplified by analysing their order of magnitude.