高压级涡轮的气动优化设计改型

蒸汽轮机高压级涡轮多为低展弦比直叶型设计,此类涡轮的二次流损失占整个流动损失的比重较大,现在的设计技术能够较好地设计出优秀的S1面叶型,但较难把握全三维的二次流损失。文中通过对单级某高压级涡轮导叶的优化设计改型,得到了较好的控制二次流损失的全三维直叶型。结果表明:最优全三维直叶型不是最优S1面叶型,二次流损失在流动中比重较大,设计中不容忽视;采用优化设计的方法,能够非常有效地提供最优直叶型,缩短设计周期。

Optimized Aerodynamics Design of High-pressure Turbine

High-pressure steam turbine usually was low-aspect ratio and straight, the secondary flow loss of such type turbine accounted for a larger proportion of the total flow loss, the S1 section profile is able to designed better with the current design technology, but more difficult to grasp the full three-dimensional secondary flow loss. In this paper, a single-stage high -pressure stage of a turbine guide vane optimal design modifications, has been better control of secondary flow loss of the entire three -dim...