摘要
在涡扇发动机的设计中,高低压涡轮过渡段处多采用较大子午扩张的结构,此结构给低压涡轮设计带来了难度。对采用前掠宽弦重新设计的低压涡轮进行了3D数值模拟,并研究了此种叶型在低压涡轮特殊结构下对气动性能的影响。结果表明:针对大子午扩张结构的低压涡轮,采用此设计能够非常有效地控制前部流动,也能降低后部流道内损失。
In turbofan engine＇ s design, the structure with a large meridional expansion was used between HP and LP turbine, and this structure has brought the difficulty for the low pressure turbine design. In this paper, the 3D numerical simulation was carried on the redesign LP turbine with forward-swept and wide-chord, and studied the effect of aerodynamic performance about the LP turbine with the special structure using such profile. The result indicated： in the LP turbine with large meridional expansion structure, it will control the front flow with such profile, also can reduce the loss of the channel flow.
出处
《汽轮机技术》
北大核心
2009年第6期428-430,共3页
Turbine Technology
关键词
子午扩张
低压涡轮
数值模拟
前掠宽弦叶型
高性能
meridioual expansion
low-pressure turbine
numerical simulation
forward-swept and wide.chord blade profile
high-performance
