摘要
采用数值模拟的方法,对在旋转情况下的有弦向出流的梯形扰流柱通道内的三维流场进行了模拟研究。重点研究了在固定出流比的情况下,不同转速对扰流柱通道内的流动情况及端壁平均换热系数的影响。计算结果表明：R_o不为0时,通道内的流场与静止时相比有较大变化,在扰流柱区域内的扰动强度明显增大,流动更加紊乱,在扰流柱区域和无柱区域内均有涡旋现象发生；当Re数一定时,通道的压降和端壁的平均换热系数随着旋转数R_o的增大而增加；旋转对扰流柱通道的压降和端壁换热系数有明显影响,旋转对扰流柱通道流动及换热的影响随通道数Re数的增大而增强。
Numerical simulation has been carried out to investigate the flow and heat transfer characteristics in a rotated trapezoidal duct with staggered pin-fin arrays used in the cooling channel of turbine blade. Particular attention has been concentrated on the effect of rotation on flow and end wall heat transfer. Results reveal that the flow have remarkable changed along with the change of rotate speed . In the region of pin - fins , the flow becomes more turbulent, and some toroidal swirls are produced both in the pin-fins region and no pin - fins region. The average end wall heat transfer coefficient and pressure drop are increase with increasing Rotate-Number （Ro）. The effect of rotation on flow and end wall heat transfer augments with increasing Re.
出处
《汽轮机技术》
北大核心
2006年第5期346-349,共4页
Turbine Technology
关键词
涡轮叶片
扰流柱
流动
传热
数值计算
turbine blade
pin - fin
flow
heat transfer
numerical simulation
