Navier-Stokes Flow Analysis for Hydraulic Turbine Draft Tubes

[+] Author and Article Information
T. C. Vu

Dominion Engineering Works, GE Canada, Lachine, Québec, Canada H8S 2S8

W. Shyy

University of Florida, Department of Aerospace Engineering, Mechanics and Engineering Science, Gainesville, FL 32611

J. Fluids Eng 112(2), 199-204 (Jun 01, 1990) (6 pages) doi:10.1115/1.2909388 History: Received June 17, 1988; Online May 23, 2008


Three-dimensional turbulent viscous flow analyses for hydraulic turbine elbow draft tubes are performed by solving Reynolds averaged Navier-Stokes equations closed with a two-equation turbulence model. The predicted pressure recovery factor and flow behavior in the draft tube with a wide range of swirling flows at the inlet agree well with experimental data. During the validation of the Navier-Stokes flow analysis, particular attention was paid to the effect of grid size on the accuracy of the numerical result and the importance of accurately specifying the inlet flow condition.

Copyright © 1990 by The American Society of Mechanical Engineers
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