摘要
本文提出一种前缘前伸内凹且根部叶片略厚的新型动叶片设计方法,旨在通过这种新型叶片控制前缘马蹄涡的生成和发展,通过根部叶片较厚到中间区域叶片厚度略低的三维设计和积叠方法,实现动叶片的弯叶片效果。论文以某高压涡轮叶片为研究对象,从能量损失系数、型面压力分布、旋涡沿流向变化对比分析了新型叶片与原型叶片对流场结构的影响。研究表明叶型前缘新的几何特征使马蹄涡得到控制,流场内流动得到改善。
In order to control the generation and development of horseshoe vortex, a new method for desig- ning rotor blade has been put forth, in which the leading edge has geometry of protrusive, a small round- ed as well as reversal curvature and thick blade root. The neo - blade has the effect of bowed blade cas- cade designed by the 3D system and stacking method. In this paper, an HP turbine rotor blade is investi- gated by comparing new blade with original blade from the coefficient of energy loss, the pressure distri- bution along profile and the transformation of vortex along flow passage. The result shows that horseshoe vortex is under control with new leading edge and the flow condition in flow field improves dramatiealiv.
出处
《节能技术》
CAS
2014年第1期3-7,共5页
Energy Conservation Technology
基金
国家科技支撑计划课题(2011BAA07B04)
关键词
高压涡轮
马蹄涡
弯叶片效果
新叶型
二次流
HP turbine
horseshoe vortex
effect of bowed blade
new blade
secondary flow
