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Numeric Simulations of the Turbulenceflows in Heat Exchanger Tube with Miniature Hydraulic Turbine

Author: GanJiaYe
Tutor: LinQingYu
School: Guangxi University
Course: Chemical Process Equipment
Keywords: Heat exchanger Miniature Hydraulic Turbine Online descaling Heat transfer enhancement N-S equation Rotating coordinate system Turbulence model CFX
CLC: TK172
Type: Master's thesis
Year: 2005
Downloads: 120
Quote: 1
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Abstract


Heat Exchanger Tube with Miniature Hydraulic Turbine , can play the role of online Anti-fouling and heat transfer enhancement . The flow field inside the tube is non - complex, almost for turbulent flow , mainly into the shape of the helical flow . The numerical simulation is an effective method to study fluid flow by means of the computer can calculate the complex flow field . Chapter II of this article from the basic equations of fluid mechanics , the equations of motion in the rotating coordinate system is established . Homogenization and control equation in order to get a closed equation turbulence model is introduced , and a brief analysis of the rotating coordinate system of the turbulence model . Finally , using the finite volume method generic equation , and a brief introduction to the development of grid . CFX is a computational fluid dynamics commercial software , its internal procedures, has a wealth of physical models , numerical calculation can be a variety of physical phenomena , CFX has three main operating interface : CFX- Pre CFX -Solver , CFX -Post . The numerical calculation of the first step is to establish the entity model, we use 3D solid modeling software Pro / E to establish the flow field area . Then guide the geometric model network meshing software ICEM-CFD meshing , processing the grid mesh quality to guarantee sufficient accuracy of the calculation results . To meshed model into CFX-Pre area of flow field boundary conditions to solve the set of control parameters , calculated with the CFX-Solver solver processing calculations in CFX-Post . The above is the main content of the third chapter . The main content of the fourth chapter of the processing of the calculation results . Finishing first experimental data , extract data for comparison with numerical calculation . And then describes how the rotation angular velocity of the liquid turbine obtained using the numerical method , and to compare the numerical results with experimental data , results little difference , illustrate the usefulness of the numerical simulation with CFX software , namely numerical mold

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Industrial thermal equipment > Heat Transfer Equipment
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