Author(s): C J Zeng; Y X Xiao; J Zhang; Z H Gui; S H Wang; Y Y Luo; H G Fan; Z W Wang

Linked Author(s):

Keywords: Pelton turbine; Hydraulic performance; Scale effect; Numerical simulation; Two-phase flow

Abstract: Pelton turbine is widely used in utilizing the high water head resource. The multi-phase flow in the Pelton turbine is too complex to be analysed detailed as the flow in the reaction turbines. So the hydraulic design of Pelton turbine was mainly based on the know-how. The homologous turbine model was the only way to verify its performance in the past. Although an efficiency scale-up equation for Pelton turbines had established in the IEC 60193 code, researches had shown different internal flow phenomena would influence the efficiency scale effects and lead to different efficiency scale for different turbine design. This paper simulates the internal flow of model and homologous prototype Pelton turbine at three relative needle strokes. Homogenous model and SST k-ω model will be adopted to simulate the unsteady two-phase flow in the rotating buckets. Unsteady simulation results would help to numerical investigate the scale effect of Pelton turbine.

DOI: https://doi.org/10.1088/1755-1315/163/1/012016

Year: 2017