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The influence of the injector vane shape on the jet flow of a Pelton turbine
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The influence of the injector vane shape on the jet flow of a Pelton turbine
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Journal Article
The influence of the injector vane shape on the jet flow of a Pelton turbine
2025
Overview
The vane in the injector can reduce the influence of the secondary flow caused by the injector, thereby prolonging the durability and ensuring the stable and economic operation under high head conditions. In this paper, the numerical simulation of water-air two-phase flow is carried out for the whole flow channel of the injector and injector of the Pelton turbine with a design head of 1200m. The 3D model of different shape vanes is constructed by controlling the thickness, length and radius of the vane. The SST k-ω turbulence model is used to analyse the influence of the shape of the vane on the downstream velocity distribution, jet shape and pressure pulsation. The circumferential velocity non-uniformity in the jet core area caused by the injector can be controlled by increasing the length of vane, while the smaller curvature radius of trailing edge may cause downstream periodic pressure pulsation increase. The research results can provide reference for the hydraulic design and performance optimization of the injector of the high head Pelton turbine.
Publisher
IOP Publishing
