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为了更好地了解涡轮叶片内冷完整通道中流体的流动特性,数值研究了肋、转弯以及旋转对完整S型带肋通道流动特性的影响.雷诺数为17 000,3个出口的出流比分别为27%,49%,24%,旋转数取0,0.03,0.06,0.09.结果表明:通道1靠近前缘侧阻塞比高,肋的扰流作用强,流体速度较低.转弯引起流体流动分离,使转弯下游通道中的主流发生偏移,通道3靠近分隔板侧存在较大范围低速区.旋转产生的切向哥氏力使流体向哥氏力指向面偏移,通道2与通道3主流分别偏向吸力面与压力面.旋转影响通道中二次流的分布,增强转弯下游低速回流涡区域流体的流动.
In order to better understand the flow characteristics of the fluid in the cold intact passage of the turbine blade, the effects of ribs, turns and rotations on the flow characteristics of a complete S-ribbed channel were numerically investigated. The Reynolds number was 17 000 and the outflow ratio The results show that the blockage ratio of the channel 1 near the leading edge is high, the spoiler effect of the ribs is strong and the fluid velocity is low. The turning causes the fluid Flow separation, so that the mainstream downstream of the turn offset, the channel 3 near the partition plate side there is a wide range of low-speed zone. Coriolis force generated by the rotation of the fluid to the Coriolis force pointing surface offset, channel 2 and The mainstream of Channel 3 is biased toward the suction side and the pressure side, respectively, and the rotation affects the distribution of secondary flow in the passage and enhances the flow of fluid in the area of low-velocity return vortex downstream of the turn.