Search results

In this paper, the temperature field of freeboard is simulated with computational fluid dynamics(CFD).
For this simulation, the Realizable turbulance model is used
Selection of simulation parameters.
The three coefficients equation is used in this simulation
The simulation results under different operation conditions are shown in Fig. 2.

Based on CFD software, three dimensional unsteady internal flow field numerical simulation of some type rotor oil pump is carried out.
And, the velocity and pressure simulation results at different speeds are obtained.
Based on acoustic finite element and infinite element method, CFD software and acoustic solver software are used to simulate the flow induced noise of rotor oil pump.
In this paper, by using the professional CFD software and the acoustic software, the internal flow induced noise of rotor oil pump is studied.
Fig.3 Flow characteristic curve at different speeds 2.2 Sound field simulation of oil pump 2.2.1 The simulation flow of sound field Based on the result of numerical simulation in internal flow field of the oil pump, couple the main variables such as pressure and flow velocity obtained from simulation results with acoustic solver.

CFD Investigation into Internal Flows of PEM Fuel Cell for Optimal Performances Zhijun Penga and Pattarapong Choopanyab School of Engineering and Informatics, University of Sussex, United Kingdom az.peng@sussex.ac.uk, bp.choopanya@sussex.ac.uk Keywords: PEM fuel cell, CFD simulation, internal flow field.
The simulation results show that a parallel flow-field design with appropriate humidity level can compete with the serpentine counterpart and gives considerably lower pressure drop across the cell.
The 3-dimensional, multi-phase models of scaled-down straight parallel and serpentine types PEMFC are developed based on a commercial CFD code to study and compare their steady-state performance.
The simulation results show that a parallel flow-field design with appropriate humidity level can compete with the serpentine counterpart and gives considerably lower pressure drop across the cell.
[6] Dawes JE, et al., Three-dimensional CFD modelling of PEM fuel cells: An investigation into the effects of water flooding, Chemical Engineering Science 64 (2009), 2781-2794

Investigation of Numerical Simulation in Combustion Chamber Predictability Rangshu XU 1, a, Ling NIU 1, b, Xinzhu WENG 2, c, Long XU 3, d and Minli BAI 4, e 1 School of Power & Energy Engineering, Shenyang Aerospace University Shenyang 110136, China 2CNR (Dalian) Engine Co., Ltd Dalian 116000, China 3Jinan Diesel Engine Co., Ltd Jinan 250306, China 4 School of Energy and Power Engineering Dalian University of Technology Dalian 116024, China aemail: xurangshu@yahoo.com.cn, bemail:793303693@qq.com, cemail:703217627@qq.com demail:64447929@qq.com eemail: baiminli@dlut.edu.cn Keywords: aeronautical and astronautical propulsion system; predictability model; numerical simulation; aero engine; combustion chamber; CFD Abstract.
An annular combustion chamber of some aero-engine is studied by means of predictive numerical simulation.
A commercial CFD code was adopted on a high performance computing cluster with parallel algorithm and the solving method are high-order discretization scheme.
Calculation Method and Physical Model It uses commercial CFD software to solve N-S equation, energy equation and component transport equation.
(4) Physical parameters varying with temperature make simulation model more similar to practice.

Performance Optimization of Building Integrated-Mounted Wind Turbine Marco Milanesea, Arturo de Risib and Domenico Laforgiac Full Department of Engineering for Innovation - University of Salento - Via per Arnesano, 73100 Lecce, Italy amarco.milanese@unisalento.it, barturo.derisi@unisalento.it, cdomenico.laforgia@unisalento.it Keywords: Wind Turbine, Taguchi method, ANOVA, CFD simulations.
Simulation model Geometrical model.
Several studies have used computational fluid-dynamics (CFD) methods to model wind flow around buildings by solving mass and momentum conservation equations [4].
This fact is a clear indication that even for very stable wind direction as it is the case for the CFD simulations, to exploit best the potential energy increase due to speed-up factor the turbine hub has to be located as far as possible from high turbulence regions.
Conclusions In the present work, CFD simulations coupled with the Taguchi method and the ANOVA techniques, allowed to identify the following guidelines for micrositing of BUWT.

In this paper, based on Navier-Stokes equations numerical simulation and two dimensional wind tunnel testing, the drag measuring technique for high lift configuration in low speed wind tunnel is researched.
In this paper, detailed measuring and numerical simulation for the flow field in 2-D drag test are carried out to improve the method of measuring and data processing in hope to overcome the difficulty that now exist in multi-airfoil drag testing.
Numerical Simulation.
The Navier-Stokes equations for 2-D compressible viscous flow is solved by the finite volume method that proposed by Jameson, and local time step, implicit residual smooth and some other accelerating convergence methods are applied in numerical simulation.
And this accord with the CFD results of wake flow field in last section.

This approach was validated by comparing the simulation results with computational fluid dynamics (CFD).
A good qualitative match between the expected value and simulation results was observed, indicating that the design method is feasible and reasonable.
CFD Verification High fidelity CFD simulation was carried out for the performance verification.
Fig. 6 Results of the blade’s shape Fig. 7 CFD results of the rotor’s and As can be seen from the CFD results, is about 40% from 4.5 to 5 of TSR value, which could be an acceptable result.
References [1] Janajreh.I, Talab.I, Macpherson.J: Numerical simulation of tower rotor interaction for downwind wind turbine.

CFD simulations solve the Navier-Stokes equations, which account for all fluid mechanical effects.
By using the CFD method, a lot of intricate questions could be well answered.
In Section III, we present materials and methods for CFD research.
Simulations were carried out for 6000 time steps to simulate swimming for twenty tailbeat periods.
Adding turbulence to the three-dimensional simulation would provide the most accurate and realistic numerical simulation of mechanical fin motion.

*Email: yc9316@163.com Keywords: CFD analysis, parameter study, SOFC model, elementary surface reactions, transport process.
The CFD model simulation has been proved an effective method for SOFC research.
In this work, a 3D CFD model is developed to simulate the working processes in SOFC’s anode.
In this work, a fully 3D CFD approach is developed to model a SOFC anode including fuel channel, porous anode and interconnect structure.
CFD Solution Methods An 3D CFD code in Fortran language is developed to solve the governing equations.

Apply the CFD numerical simulation the internal flow field and noise when the control valve is bonnet leakage and trouble-free.
This article through the establishment of control valve bonnet leakage and trouble-free flow model, the application of CFD numerical simulation and analysis of the internal flow field and the distribution of the noise, it provides theoretical basis for further research of valve bonnet leakage.
Fig. 1 Bonnet outside leakage schematic Meshing and Simulation Settings The flow channel model need meshing before CFD simulation.
Conclusion Establishing the valve trouble-free and bonnet leakage flow model, and applying the CFD numerical simulation of internal flow field and noise, obtained the following conclusions
Numerical Simulation and Analysis of Interior Flow Field in Control Valves under the Blocking Fault [J].