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Characteristics of Hydraulic Shock Waves in an Inclined Chute Contraction – Numerical Simulations

Published online by Cambridge University Press:  05 May 2011

C.-D. Jan ,
C.-J. Chang ,
J.-S. Lai  and
W.-D. Guo
C.-D. Jan*
Affiliation:
Department of Hydraulic and Ocean Engineering and Sustainable Environment Research Center, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
C.-J. Chang*
Affiliation:
Department of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
J.-S. Lai*
Affiliation:
Hydrotech Research Institute, Disaster Research Center, National Taiwan University, Taipei, Taiwan 10617, R.O.C
W.-D. Guo*
Affiliation:
Hydrotech Research Institute, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
*
*Professor
** Ph.D. candidate
***Associate Research Fellow
****Postdoctoral Researcher
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Abstract

This paper presents the results of numerical simulations on the characteristics of hydraulic shockwaves in an inclined chute contraction. A two-dimensional numerical hydraulic simulation model is used to simulate the hydraulic shockwaves, based on the finite-volume multi-stage (FMUSTA) scheme proposed by Guo et al. [1]. This numerical model has been proved having good ability in simulating hydraulic shockwaves through the comparison with the exact solution of idealized shockwaves in a horizontal contraction provided by Ippen and Dawson [2], and the comparison with experimental results provided in the companion paper by Jan et al. [3]. The simulated shockwave parameters such as the shock angle, maximum shockwave height and maximum shockwave position for various conditions are compared with those calculated by the empirical relations obtained in the companion paper. The numerical results validate the applicability of these empirical relations and also extend their applicability to higher approach Froude numbers.

Keywords

Shock waveChute contractionNumerical simulationFMUSTA scheme.
Type
Articles
Information
Journal of Mechanics , Volume 25 , Issue 1 , March 2009 , pp. 75 - 84
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2009

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