Francis turbine pdf

Traditional runner X blade runner. Abstract - The aim for turbine design is to increase the efficiency and avoid cavitation and fractures during operation. A brief discussion on a the design philosophy during the last years with will be presented.

KE is utilized which increases efficiency of the turbine. Prevent splashes of water coming out of the runner. Increase area of water exit, increase whirling action, suit for.

It varying from to 5m. The specific speed ranges from to 400. This turbine is used for medium heads with medium discharge. Water enters the runner and flows towards the centre of wheel in the radial direction and leaves parallel to the axis of the turbine. The flow enters the turbine in a radial direction, flowing towards its axis, but after striking and interacting with the turbine blades it exits along the direction of that axis.

It is an inward-flow reaction turbine that combines radial and axial flow concepts. What better testimony to our more than 1years of hydro turbine experience? Francis in Lowell, Massachusetts.

The water from the supply penstock flows Fig. The turbine has a sturdy base which sits on the top of the hydraulic bench. The bench measures the flow rate.

Water pressure decreases as it passes through the turbine imparting reaction on the turbine blades making the turbine rotate. In the turbine machinery the energy conversion is indirect and always takes place through the change of kinetic energy of the fluid. For this we may consider Fig. In the turbine the fluid flows from the pressure penstock into the turbine machine and first flows through a cascade of guide vanes.

Introduction A turbine is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. Turbines are used in boat propulsion systems, hydroelectric power generators, and jet aircraft engines. GE has continuously invested in RD to increase turbine efficiency and developed specific product enhancements to improve machine performance. as PDF File (. pdf ), Text File (.txt) or view presentation slides online. These turbines can be used for heads as low as meters and as high as 3meters. Additionally, these turbines are beneficial as they work equally well when positioned horizontally as they do when they are oriented vertically.

Hydro power plants Tail water Draft tube gate Draft tube Turbine Main valve. Arrangement of a small hydropower plant. A reaction turbine is usually well suited for low heads.

A radial flow hydraulic turbine of reaction type was first developed by an American Engineer, James B. Pumps, Turbines and Pipe networks – Moment of Momentum Revisited – Types of pumps and turbines and uses – Pump-pipe systems, networks 2. Open Channel Flow – Specific Energy and Rapid Transitions – Hydraulic Jumps – Slowly varying flow – Open channel control structures 3. It has a compact structure, reliable operation. H for horizontal, V for vertical 2. Kaplan turbine is axial flow turbine i.