The rotary wheel of an axial-flow turbine is composed of a rotor body, a blade, and a drain cone Mixed flow, blade axis perpendicular to turbine axis. Suitable for medium and low water head, flow Quantity of hydropower station. Under the same head, the specific speed is higher than that of the mixed-flow turbine. The applied head is about 3 to 80m. The flow becomes radial between the guide vane and the wheel Axial flow, whereas in the wheel area, the flow maintains an axial flow.