Numerical Simulation of Modified Trailing Edge of Francis Turbine Stay Vane Based on Solid-Liquid Two-Phase Flow

Dong Wang; Si Qing Zhang; Yun Long Zhang

doi:10.4028/www.scientific.net/AMM.700.643

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 700Numerical Simulation of Modified Trailing Edge of...

Numerical Simulation of Modified Trailing Edge of Francis Turbine Stay Vane Based on Solid-Liquid Two-Phase Flow

Abstract:

In order to investigate the silt abrasion of modified trailing edge of stay vane in Francis turbine, the numerical simulation of trailing edge with different geometries were carried out based on the solid-liquid two-phase flow by means of Computation Fluid Dynamics. The results show that low solid volume fraction distributes on the chamfered surface of trailing edge, and high solid volume fraction distributes on the end of oblique surface. The smaller the modified angle is, the larger the distribution area of high solid volume fraction is, which show the trailing edge with smaller oblique angle may suffer from silt abrasion. Therefore, in order to solve the vibration caused by Karman vortex the trailing edge has to be sharpened, the oblique angle of trailing edge should not be too small. At end of trailing edge needs to ensure a certain thickness, especially the trailing edge near the lower ring can be thicker, which can meet the anti-abrasion requirements.

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Periodical:

Applied Mechanics and Materials (Volume 700)

Pages:

643-646

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.700.643

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Online since:

December 2014

Authors:

Dong Wang, Si Qing Zhang*, Yun Long Zhang

Keywords:

Modification, Numerical Simulation, Solid-Liquid Two-Phase Flow, Stay Vane, Trailing Edge

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* - Corresponding Author

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