超跨声速无导叶对转涡轮整流型动叶设计

Straightening rotor blades design of supersonic vaneless contra-rotating turbine

关键词:  气动设计  通流设计  可控涡  对转涡轮~+  无导叶~+

Key words:  Aerodynamic design  Throughflow design  Controlled vortex  Contra-rotating turbine~+  Vaneless~+

摘要:

为了探讨对转涡轮气动设计规律,采用常用于导叶的可控涡法设计对转涡轮上游整流动叶,并配合可控子午成型设计,用以控制对转涡轮内径向压力分布,并与传统涡轮进行了深入对比分析。该方法设计的5.25kg/s小流量模型对转涡轮效率为94.2%。三维数值模拟表明:对转涡轮取消导叶后,在设计自由度减小,参数受到制约条件下,整流动叶采用可控涡设计是调控对转涡轮流场积极有效措施之一。

Abstract:

To Investigate the aerodynamics design methods of vaneless contra-rotating turbine(VCRT),the throughflow design and analysis of VCRT compared with conventional turbine have been conducted by the ways of both controlled vortex and controlled meridian contours.The counter twisted theory of stationary vanes is applied to the high pressure straightening rotor of VCRT and a 94.2% high efficiency VCRT was designed.The results of 3D simulation indicated that it is important to adopt the way of controlled vortex to design the straightening rotor for improving the dynamic performance of VCRT on condition that its vanes are eliminated completely which decreases two free design parameters.