摘要
应用粘性流动数值计算对叶轮机械叶片进行设计，能够使设计者对几种不同设计方案进行分析以满足设计要求，并获得最佳设计方案．本文采用三维N．S方程组和Baldwin-Lomax湍流模型，对一个小长径比的汽轮机导叶进行三维粘性流场数值模拟．计算结果表明，采用合适的周向弯曲（优化径向积叠）同样可以提高短叶片的效率．本计算方法可用来分析和研究叶片径向积叠形式对径向和周向流量平均绝热效率的影响，以获得较优的积叠形式．
Application of viscous flow computations to turbomachinery design enables designeranalyze several design options to meet program goals, perform parameter sensitively studies,and to achieve an optimal design. In the present paper the Navier-Stokes solver, coupledwith Baldwin and Lomax's algebraic eddy viscous turbulence model, is applied to solvethree-dimensional viscous fluid flow of a steam turbine stator. It is a low span diameterratio blading. In the present paper it is shown that the efficiency can be increased even forthe short blades if the circumferential skewing (blade stacking) is used. In the present paperthe direct viscous computations are used to analyze and to study the effect of the form ofradial stacking of the blades on the span-wise distribution of pitch-wise averaged adiabaticefficiency, and then to obtain the stacking form that is closed to the optimal.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1998年第3期305-309,共5页
Journal of Engineering Thermophysics
关键词
叶片积叠
小长径比
汽轮机
静叶片
aero-thermodynamic optimization, blade stacking, viscous computation,turbine stator blading, 3-D flow computation
