径轴流涡轮动叶出口扭曲规律与几何参数一体化最优设计方法

An Integrated Optimization Design Method for a Radial-Axial Flow Turbine with Optimum Criteria of Blade Twist at the Blade Outlet

本文以平均截面处参数α_1,β_2,μ,(?)和m=u_2/w_2cosβ_2,及动叶出口处扭曲规律为变量,以设计工况内效率为目标,提出了一个带有多种约束条件的径—轴流涡轮一体化最优设计方法。给出了各种扭曲规律下的最优设计结果。计算表明本文提出的方法是有效且实用的。

This paper provides an integrated optimum design method for a radial-axial flow turbine with constraints of engineering construction conditions, in which five parameters atmean radius, i.e. α_1, β_2, μ,u_1, and m=u_2/w_2cosβ_2,and the criteria of blade twist at blape outlet, are taken as design variables and the internal efficien(?)y of design conditions as an objective function. Some results of optimization for a variety of twisted blades are also presented. The results of calculation show that the method presented is valid and effective.