旋转涡轮叶片前缘热色液晶测温技术研究

建立了基于频闪拍照和液晶测温技术的旋转态全环涡轮叶片前缘外壁面温度场测量系统，研究了不同旋转状态下前缘外壁面温度场特性。实验结果表明:该系统能够获取旋转状态下全环涡轮叶片前缘外壁面温度分布，并具有足够的分辨率和精度；随着旋转数的增加，前缘气膜冷却效率整体呈下降趋势，且加剧了压力面和吸力面气膜冷却效率的不均衡。 

Study on thermometry of leading edge of rotating turbine blade by thermochromic liquid crystal

A temperature measure system for the leading edge of the rotating turbine blade was established based on stroboscopic imaging technique and thermochromic liquid crystal, while the temperature field characteristics of the leading edge were studied under different rotational speeds. The experiment result showed that this system was workable, and presented enough resolution and accuracy; the film cooling efficiency of the leading edge decreased with the increasing rotation number, and the disequilibrium of the film cooling efficiency on the pressure and suction surfaces increased.