Author : Varun Sharma and Sanjeev Kumar Dhama

The turbine which converts gravitational energy of elevated water into mechanical work is called a pelton wheel impulse turbine. It is a hydro mechanical energy conversion device. This mechanical work is converted into electrical energy by means of running an electrical generator. The kinetic energy of water jet act tangentially on runner of pelton turbine. This runner consist of buckets which are also called as blade so turbine. The shape of blades of pelton turbine consists of splitter profile which splits into two halves such that each turned backward almost through 1800 relative to the bucket in horizontal plane. Normally all the jet energy is utilized in propelling the rim of water wheel. This impingement with some force when hits the buckets, it goes through the round periphery in splitter manner. This force produces stress on buckets or turbine blades. Which varies from certain sound value at the place of impingement to the reduced values as water goes outward. In this study of stress analysis on pelton turbine blade is done using Ansys 12.0. In the analysis jet impinges on runner blade of pelton turbine. The stress variations with respect to the geometry of blade are calculated by software itself. The CAD model of blade is made using pro-E software. In it stress calculated by software from tip to end of periphery of runner blade.

Keywords: Pelton Turbine, Stress analysis, Jet Impingement, blade deformation

Article published in International Journal of Current  Engineering  and Technology, Vol.4,No.4 (Aug- 2014)