具有小径高比的环形透平静叶栅的吹风实验表明:沿尾流区的径向二次流和高损失区二次动能的消散引起的掺混是产生下游流损失的主要根源,因此减小或消除径向正压梯度和减少进入下游流低动量气流的数量是改善下游流特性的两条主要措施。 Air blowing experiments on toroidal turbine stationary cascades with a small aspect ratio show that blending due to the dissipation of secondary kinetic energy in the radial secondary and wake regions along the wake region is a major source of downstream flow losses and therefore decreases Or eliminate the radial positive gradient and reduce the amount of low-momentum airflow into the downstream stream are two major measures to improve the downstream flow characteristics.