Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway

The smooth spillway is a classic design used to spill large volume of water from the dam reservoir. Several studies of hydraulic characteristics of the spillway have been conducted experimentally and numerically in recent decades to provide a better insight into flow behaviour and predict any critic...

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Main Author:	Saidin, Mohd Safarul Izmi
Format:	Thesis
Language:	English
Published:	2021
Subjects:	T Technology
Online Access:	http://eprints.usm.my/56210/1/Investigation%20Of%20Hydraulic%20Performance%20On%20Unsymmetrical%20Smooth%20Spillway.pdf
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spelling	my-usm-ep.562102023-01-04T02:59:45Z Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway 2021-06-01 Saidin, Mohd Safarul Izmi T Technology TA1-2040 Engineering (General). Civil engineering (General) The smooth spillway is a classic design used to spill large volume of water from the dam reservoir. Several studies of hydraulic characteristics of the spillway have been conducted experimentally and numerically in recent decades to provide a better insight into flow behaviour and predict any critical area that could endanger the structure and environment. An experimental study was carried out on a laboratory scale model to investigate basic hydraulic characteristics of the unsymmetrical smooth spillway with three sizes of discharge namely as Q1, Q2 and Q3. Next, the simulation verification were done using grid independent test (GIT), time step size analysis, and simulation time observation. In simulation, Reynolds-averaged Navier-Stokes (RANS) equation, volume of fluid (VOF) scheme and Standard κ-ω (SKW) turbulence model with appropriate boundary conditions were used to simulate the unsymmetrical smooth spillway geometry with four sizes of discharge namely as Q1, Q2, Q3 and Q4. The simulation results provide a good prediction of the hydraulic characteristics of water flow on the unsymmetrical smooth spillway and show a good agreement in terms of water surface and velocity profiles patterns with the experimental results. In the last objective, four chute piers modification models (diverge -45 degree, diverge -15 degree, converge 15 degree and converge 45 degree) were simulated using Q3 and Q4 discharge water flows and the hydraulic jump performance of all models were compared with the normal geometry. For all modification models, the converge 15 degree model showed 5.06% and 2.49% higher energy dissipation than the normal geometry model using Q3 and Q4, respectively. The chute piers modifications on unsymmetrical spillway will affect the energy dissipation performance at stilling basin and provide good insight which can be considered for spillway design in the future. 2021-06 Thesis http://eprints.usm.my/56210/ http://eprints.usm.my/56210/1/Investigation%20Of%20Hydraulic%20Performance%20On%20Unsymmetrical%20Smooth%20Spillway.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Awam
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology
spellingShingle	T Technology T Technology Saidin, Mohd Safarul Izmi Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway
description	The smooth spillway is a classic design used to spill large volume of water from the dam reservoir. Several studies of hydraulic characteristics of the spillway have been conducted experimentally and numerically in recent decades to provide a better insight into flow behaviour and predict any critical area that could endanger the structure and environment. An experimental study was carried out on a laboratory scale model to investigate basic hydraulic characteristics of the unsymmetrical smooth spillway with three sizes of discharge namely as Q1, Q2 and Q3. Next, the simulation verification were done using grid independent test (GIT), time step size analysis, and simulation time observation. In simulation, Reynolds-averaged Navier-Stokes (RANS) equation, volume of fluid (VOF) scheme and Standard κ-ω (SKW) turbulence model with appropriate boundary conditions were used to simulate the unsymmetrical smooth spillway geometry with four sizes of discharge namely as Q1, Q2, Q3 and Q4. The simulation results provide a good prediction of the hydraulic characteristics of water flow on the unsymmetrical smooth spillway and show a good agreement in terms of water surface and velocity profiles patterns with the experimental results. In the last objective, four chute piers modification models (diverge -45 degree, diverge -15 degree, converge 15 degree and converge 45 degree) were simulated using Q3 and Q4 discharge water flows and the hydraulic jump performance of all models were compared with the normal geometry. For all modification models, the converge 15 degree model showed 5.06% and 2.49% higher energy dissipation than the normal geometry model using Q3 and Q4, respectively. The chute piers modifications on unsymmetrical spillway will affect the energy dissipation performance at stilling basin and provide good insight which can be considered for spillway design in the future.
format	Thesis
qualification_level	Master's degree
author	Saidin, Mohd Safarul Izmi
author_facet	Saidin, Mohd Safarul Izmi
author_sort	Saidin, Mohd Safarul Izmi
title	Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway
title_short	Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway
title_full	Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway
title_fullStr	Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway
title_full_unstemmed	Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway
title_sort	investigation of hydraulic performance on unsymmetrical smooth spillway
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Awam
publishDate	2021
url	http://eprints.usm.my/56210/1/Investigation%20Of%20Hydraulic%20Performance%20On%20Unsymmetrical%20Smooth%20Spillway.pdf
_version_	1776101151810256896

Investigation Of Hydraulic Performance On Unsymmetrical Smooth Spillway

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