Session: 03-10: Fluid Power

Paper Number: 136418

136418 - Partial Jet Cutting and Torque Evaluation on Cut-In Jet Deflector for Pelton Turbine 

Hydraulic turbines play an essential role in stabilizing electrical grids due to their fast response time. Compared to other hydraulic turbines, a jet deflector of a Pelton turbine enables rapid response for load reduction. The complete pushout of the jet saves the turbine from going to run away speed in case of load rejection. Moreover, a partial cutting of the jet using a cut-in jet deflector plays a role in the fast controlling of power and the associated positive effect on the stabilization of the electrical grid and can be used at isolated hydropower plants for speed control. During this control operation, cut-in jet deflector is subjected to high forces and torques that are governed by the servomotor control. Thus, the evaluation of torque for designing jet deflector and servomotor requires experimental measurements at different angular positions of the cut-in jet deflector. During the partial jet cutting the jet quality is equally essential as ultimately, the remaining jet has to be impacted on the Pelton runner for active power generation. In this study, the experimental measurements have been performed for torque measurement at different angular positions using the high-precision torque transducer, and computational fluid dynamics simulations are carried out to observe the jet flow behavior during jet cutting.

Presenting Author: Firoz Khan Indian Institute of Technology Roorkee