【摘要】 为设计一种SRR结构具有大扩张通道的超声高载荷对转涡轮高压动叶,提出了一种更符合三维真实流动状态的S1流面三维造型法,详细阐述了三维造型方法基本原理,并用之设计了一个出口马赫数为1.33、通道扩张角为37.3°的超声高载荷对转涡轮动叶。三维数值模拟结果显示对转涡轮动叶流场参数分布合理,没有出现分离,滞止效率达到92.57%。实例表明三维造型法由于充分考虑涡轮流场三维性,对于通道扩张度大、流线曲率变化剧烈的涡轮叶片,比传统二维柱面造型法更精确、更实效。更多还原

【Abstract】 A new 3D profile design method based on S1 sur fa ce and more according with the true 3D flows in machinery, is presented in the p aper in order to design the rotor blades of supersonic highly loaded contra-rot ating turbine(CRT) with large meridional flowpath divergence angle. The basic pr inciple of 3D profile design is introduced in detail and the high pressure rotor of supersonic highly loaded CRT with exit Mach 1.33 and meridional channel div ergence angle 37.3° is designed.The results of 3D numerical simulation indicat e that not only the distribution of dynamic parameters is well-proportioned wit hout separate flow in CRT but also its stagnation efficiency reaches 92.57%.The results of CRT design show that the 3D profile design method is more precise an d effective than the conventional 2D cylinder method for turbine blades with lar ge expansile meridional channel and sophisticated streamlines because the 3D cha racteristics of flow are considered well.更多还原