研究结果表明,除了在叶轮进口的前缘附近区域存在较高的流动损失外,整个通道基本均处于低损失状态,这表明叶轮通道具有较好的整流以及导流效果,能够利用有限的几何约束引导流体向需要的方向运动,从而保证了涡轮具有较高的气动效率。进口附近的高流动损失主要来源于静叶摩擦以及叶轮高速旋转所带来的相对运动。同时,由于在涡轮通道向外界输出功,流体的压力能与动能转换成叶轮的机械旋转动能,并克服流动损失,所以从进口至出口高温高压氦氙气的绝对总压逐渐降低。
The research results show that except for the high flow loss in the area near the leading edge of the impeller inlet, the whole channel is basically in a state of low loss, which indicates that the impeller channel has a good rectification and diversion effect, and can guide the fluid to the required direction by using limited geometric constraints, thus ensuring the turbine has a high aerodynamic efficiency. The high flow loss near the inlet is mainly due to the relative motion caused by stator blade friction and high-speed rotation of the impeller. At the same time, due to the work output to the outside world in the turbine channel, the pressure energy and kinetic energy of the fluid are converted into the mechanical rotational kinetic energy of the impeller, and the flow loss is overcome, so the absolute total pressure of the high temperature and high pressure helium-xenon gas from the inlet to the outlet is gradually reduced.