摘要
采用数值模拟技术对轴向前掠,轴向后掠和原叶片进行计算,研究掠高变化对涡轮静叶栅气动性能的影响。结果表明:叶片前掠时,掠高增大使反C型压力分布加强,而反C型压力分布使端壁损失增大,但前掠减小了流道主流区的总压损失。叶片后掠时,掠高增大使C型压力分布被加强,而C型压力分布使端壁损失减小,但后掠增大了流道主流区的总压损失。
The axial fore-sweep , axial aft-sweep and prototype blades are computed by numerical simulation technology, and the influence of sweep height to turbine static cascades aerodynamics was studied. The numerical simulation results indicates： the sweep height of fore-sweep blades strengthen the C-type pressure distribution, the C-type increase the endwall corner loss, but fore-sweep decrease the total pressure loss of main flow at mid-span. The sweep height of aft-sweep blades also strengthen the negative C-type pressure distribution, the negative C-type decrease the endwall secondary flow loss, but aft-sweep increase the total pressure loss of the main flow at mid-span.
出处
《流体机械》
CSCD
北大核心
2008年第11期23-27,共5页
Fluid Machinery
关键词
汽轮机
掠高
仿真
压力分布
steam turbine
sweep height
simulation
pressure distribution
