Large-Eddy Simulation of Three Dimensional Annular Swirling Jet Flow

碩士 === 逢甲大學 === 土木及水利工程所 === 90 === Abstract A finite-difference method for the numerical simulation of the incompressible, time-dependent and three-dimensional Navier-Stokes equations in a confined annular swirling jet flow is presented. The variables of velocity are solved together with explicit...

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Main Authors: Tzu-Yi Chuang, 莊子儀
Other Authors: C-B Liao
Format: Others
Language:en_US
Published: 2002
Online Access:http://ndltd.ncl.edu.tw/handle/52pcr9
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spelling ndltd-TW-090FCU050170292018-05-10T04:22:13Z http://ndltd.ncl.edu.tw/handle/52pcr9 Large-Eddy Simulation of Three Dimensional Annular Swirling Jet Flow 三維環形渦漩噴流場之大渦數值模擬 Tzu-Yi Chuang 莊子儀 碩士 逢甲大學 土木及水利工程所 90 Abstract A finite-difference method for the numerical simulation of the incompressible, time-dependent and three-dimensional Navier-Stokes equations in a confined annular swirling jet flow is presented. The variables of velocity are solved together with explicit Adams-Bashforth scheme and implicit Crank-Nicolson scheme, then a projection method is used to derive the pressure Poisson equation which solved by fast Fourier transform and a tridiagonal matrix system, so a second order accurate solution can be achieved in both space and time discretization. For the turbulence flow field, a Large-eddy simulation is used. By means of the TecPlot 3D software displaying the numerical data as visual, it’s convenient for us to thrash out the flow-field. Fixed the blockage ratio(Di2/Do2) and expansion ratio(De/Do), the Reynolds number and swirling number are the primary parameters of the flow, we discussed the Reynolds number from 100 to 10000 and swirling number from 0 to 0.5. By comparing with the Sheen et al. experiment, the results are good agreement and three dimensional numerical model was established successful indeed. C-B Liao 廖清標 2002 學位論文 ; thesis 96 en_US
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description 碩士 === 逢甲大學 === 土木及水利工程所 === 90 === Abstract A finite-difference method for the numerical simulation of the incompressible, time-dependent and three-dimensional Navier-Stokes equations in a confined annular swirling jet flow is presented. The variables of velocity are solved together with explicit Adams-Bashforth scheme and implicit Crank-Nicolson scheme, then a projection method is used to derive the pressure Poisson equation which solved by fast Fourier transform and a tridiagonal matrix system, so a second order accurate solution can be achieved in both space and time discretization. For the turbulence flow field, a Large-eddy simulation is used. By means of the TecPlot 3D software displaying the numerical data as visual, it’s convenient for us to thrash out the flow-field. Fixed the blockage ratio(Di2/Do2) and expansion ratio(De/Do), the Reynolds number and swirling number are the primary parameters of the flow, we discussed the Reynolds number from 100 to 10000 and swirling number from 0 to 0.5. By comparing with the Sheen et al. experiment, the results are good agreement and three dimensional numerical model was established successful indeed.
author2 C-B Liao
author_facet C-B Liao
Tzu-Yi Chuang
莊子儀
author Tzu-Yi Chuang
莊子儀
spellingShingle Tzu-Yi Chuang
莊子儀
Large-Eddy Simulation of Three Dimensional Annular Swirling Jet Flow
author_sort Tzu-Yi Chuang
title Large-Eddy Simulation of Three Dimensional Annular Swirling Jet Flow
title_short Large-Eddy Simulation of Three Dimensional Annular Swirling Jet Flow
title_full Large-Eddy Simulation of Three Dimensional Annular Swirling Jet Flow
title_fullStr Large-Eddy Simulation of Three Dimensional Annular Swirling Jet Flow
title_full_unstemmed Large-Eddy Simulation of Three Dimensional Annular Swirling Jet Flow
title_sort large-eddy simulation of three dimensional annular swirling jet flow
publishDate 2002
url http://ndltd.ncl.edu.tw/handle/52pcr9
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