How does a Kaplan turbine work?
The Kaplan turbine is an inward flow reaction turbine, which means that the working fluid changes pressure as it moves through the turbine and gives up its energy. The design combines features of radial and axial turbines. The inlet is a scroll-shaped tube that wraps around the turbine’s wicket gate.
What type of turbine is Kaplan turbine?
propeller hydro turbine
A Kaplan turbine is a type of propeller hydro turbine (specifically a reaction turbine) used in hydroelectric plants. Water flows both in and out of Kaplan turbines along its rotational axis (axial flow).
How Kaplan turbine is differ from propeller turbine?
The Kaplan is of the propeller type, similar to an airplane propeller. The difference between the Propeller and Kaplan turbines is that the Propeller turbine has fixed runner blades while the Kaplan turbine has adjustable runner blades. It is a pure axial flow turbine uses basic aerofoil theory.
How does Kaplan Runner receive water?
Francis runner and schematic of flow in Francis turbine. In the Kaplan turbine, water flows through the propeller and sets the latter in rotation. Water enters the turbine laterally (Figure 10), is deflected by the guide vanes, and flows axially through the propeller.
Which turbine has highest discharge?
Pelton has high head and low discharge. Explanation: Based on heads and discharges, turbines are classified into Pelton, Francis or Kaplan. Kaplan has low head and high discharge. Explanation: Francis turbine is a widely used turbine.
Is turbine a propeller?
Generally speaking, a turbine does the opposite of a fan or propeller. The turbine extracts energy from a moving fluid, while the other two add energy to a moving fluid. That means the turbine uses mechanical energy to give electrical energy and the fan or propeller uses electrical energy to give mechanical force.
Why Kaplan turbine blades are twisted?
The runner blades has twist along its length in order to have always optimum angle of attack for all cross section of blades to achieve greater efficiency. From the runner blades, the water enters into the draft tube where its pressure energy and kinetic energy decreases.
Which turbine is used for low discharge?
Explanation: Based on heads and discharges, turbines are classified into Pelton, Francis or Kaplan. Pelton has high head and low discharge.