The axial - flow turbine generator set is suitable for low head from 2m to 70 . its feature is that the water flow passes through the runner axially . the axialflow turbine generator set can be classified into two forms according to the runner construction : one is fixed blades propeller for small variation of head and power , the other is movable blades kaplan for large variation of head and power 贯流式水轮发电机组是低水头大流量电站的较好机型，一般适用于水头2 ~ 15米，其特点是水流从进水口到尾水出口都是轴向的，流道基本上成直线，因而贯流式水轮发电机组具有水流特性好，效率较高等特点。
