FLOWS parallel to the axis of the rotation of the shaft.A reaction turbine is a turbine in which the head at the inlet is sum of the PRESSURE energy and kinetic energy and during the flow of water through the runner a part of pressure energy is converted into kinetic energy.The shaft of the turbine is VERTICAL in axial flow reaction turbine.There are two important types of axial flow reaction turbine:1. Kaplan Turbine:When the vanes on the HUB are adjustable, then the turbine is KNOWN as Kaplan turbine.2. Propeller Turbine:When the vanes on the hub are not adjustable, then the turbine is known as propeller turbine.