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Some researchers have studied the turbulence models including large eddy simulation for improving the numerical accuracy of the fluid simulation[1].
In this study, the unsteady simulations were carried out using a commercial CFD code – FLUENT, and moving mesh with a time step matched to rotaing angle of 15 degree was used for simulation the unsteady flow.
The CFD code was developed based on finite volume method which is one of the popular numerical methods[6-8].
Conclusions A numerical simulation model for 1kW wind turbine blade was constructed based on a commercial CFD code.
The developed model and simulation results have made a theoretical basis for simulation of wind turbine blade.

In contrast, it is relatively easy and cost effective to carry out a parametric study through numerical simulation and derive acceptable correlations for use in industry.
The CFD analysis is carried out using FLUENT 12.1, Colburn factor j and fanning friction factor f are calculated for different Reynolds numbers.
Description of the problem and geometry A total of 250 different fin surfaces are modeled and CFD analysis is carried out for developing correlations.
The fluid path has been modeled using CFD.
Figure 2 shows the temperature and pressure profile of a triangular fin at Re = 5000 based on the CFD output data.

From numerical simulations, wave dynamic processes are simulated and discussed.
Numerical analysis and simulations Computational model.
CFD simulation for overpressure muzzle blast flowfield.
Numerical simulation and modeling of a muffler.
[5] Hafizur Rehman, Hanshik Chung: Taewhee Joung, CFD analysis of sound pressure in tank gun muzzle silencer, J.

With the development of computational fluid dynamics technology, the CFD technology can make a comprehensive prediction on the product properties according to the actual situation which has been widely used in related industries in foreign countries.
In recent years, the CFD software is gradually popularized in China, which our country also began to pay attention to the application of CFD technology to the design and development of pump products.
Based on the current research status of this, the paper uses CFD software FLUENT to simulate the flow field of turbulent flow in fluorine plastic centrifugal pump, which is reference worth to the advance in the design of level centrifugal pump.
Through the simulation values of numerical simulation of fluorine plastic centrifugal pump were compared with the experimental values of pump performance test system, the design of the pump was reasonable, and is also good to play the role of centrifugal pump performance prediction.
In Chinese [5] Richard B，MedvitzR B，RobertF，etal Performance analysis of cavitation flow in centrifugal pumps using multiphase CFD[J]．Journal of Fluids Engineering, 2002, 124(2)：377~383．

Internal Flow Field Analysis of Engine Intake Manifold Based on RE and CFD Caiyun WANG 1, Zhixia HE 1,Qian WANG1,Guojun ZHANG 2,Shuo WANG 2 1School of Energy Resources and Power Engineering, Jiangsu University, Zhenjiang 212013,China 2Beijing SinoFlowHytechInc.Ltd,Beijing 100083,China Key words: Intake manifold ,Reverseengineering,Numerical simulation，Structureoptimization Abstraction: The performance of the engine air intake system directly affect the working performance and fuel consumption, where the intake manifold design is the key.In this paper aimed at L91 Engine intake manifold ,firstly theRE(Reverse Engineering)technology was usedto rebuild the3d model of intake manifold.And then the internal flow zoneof the intake manifoldwas meshedin the pre-processing software ICEMand the internal flow fieldwas analyzedin the softwareof Fluent.The numerical model was verified by comparing the simulated and measured results.
Figure3.The velocity of four outlets for experiment and simulation Numerical Simulation and Analysis The relationship between the rotating speed of the fan and the intake manifold inlet velocity was shown in Table 2.Here to inlet velocity 14.684m/s as an example.Figure4 shows the simulated pressure distribution in the manifold, when different outlet opens, the variation of pressure in the intake manifold are basically same ,from inlet to outlet, the pressure value is gradually reduced.
By joining spoilerchanging inlet length.When using CFD to analysis , controlling the spoiler at an angle .Need to be aware of thatthe meshsize of spoiler is set to 3.5 mm.
Pressure difference at four outlets before and afteroptimization Figure8.Pressure field distribution Figure9.Velocity field distribution before(L) and after(R) optimization before(L) and after(R) optimization Conclusions CFD technology has been a kind of effective method to study the flow characteristics in the intake manifold.The change trend of the pressure and velocity in the intake manifold are similar.Flow Resistance losses of intake manifold with variable length is reduced and the air was distributedmore evenly.
Plastic intake manifold flow field based on CAD/CFD analysis and structure improvement [D].Weihai: Fan Aihua, 2010. 6-9 [2]Guowei, the engine air intake system of CFD analysis and experimental research [D].

The flow field of the static tube is simulated and analyzed to get pressure coefficient Cp curve in flight test environment by using Computational Fluid Dynamics (CFD) technology.
Based on the simulation result and considering the impact of front and rear connectors, the main geometric paramters of static tube is determined and optimized.
Table 1 The Cp of different diameter of static port d/(mm) ΔP= Pi-P∞/ (Pa) Cp 0.8 320.3 0.0174 1.0 219.0 0.0119 1.2 346.0 0.0188 1.4 228.2 0.0124 1.6 347.9 0.0189 Fig. 7 Velocity distribution inside the static tub Comprehensive Simulation of Static Tube Parameters Based on the CFD simulation result data item, the parameter of the static tube is determined as follow: the length is 390mm; the static port location is 250mm; 6 static ports uniformly distribute along the circumference; the diameter of static port is 1.0mm; the inner and outer diameter are respectively 6.8mm and 10mm.
A simulation of the static tube with numerical computation method has been done to verify that the design of the static tube can accurately measure the static pressure of aircraft within the scope of Mach number.
The simulation result shows that, the Cp of the static tube designed is less than 0.02, which is higher than that of the airborne pitot static pressure measurement system.

In recent years, computational fluid dynamics (CFD) simulation have become popular in membrane separation simulation.
A CFD study of unsteady flow in narrow spacer-filled channels for spiral-wound membrane modules.
CFD simulation of fluid flow through spacer-filled membrane Module: selecting suitable cell types for periodic boundary conditions.
And a three-dimensional CFD simulation was performed to study the velocity distribution in flow channel of the membrane module, and the effect of face permeability, porous medium thickness, and pressure-jump coefficient of porous-jump model on membrane flux.
Membrane parameters setting Fluent software was used to CFD for the simulation of the velocity distribution in flow channel of the membrane module, and the effect of face permeability, porous medium thickness, and pressure-jump coefficient of porous-jump model on membrane flux were investigated.

For that purpose, a 10450-DWT tanker is considered in a study using computational fluid dynamics (CFD).
The averaged time required for running a model simulation is approximately two and a half hours.
Wang, Numerical simulation of viscous wake field and resistance prediction around slow-full ships considering free surface.
Kraskowski, CFD optimization of vortex generators forming the wake flow of large ships, In: Proc. 13th Numerical Towing Tank Symposium, Duisburg, Germany (2010)
Turnock, Free-surface CFD prediction of components of ship resistance for KCS, In: Proc. 13th Numerical Towing Tank Symposium, Duisburg, Germany (2010)

Flow Pattern and Efficiency Changes of Squirrel Cage Fans due to Inlet Diffuser Diameter Changes - Using CFD Method and Experimental Validation Mojtaba Gholamiana, Gurram Krishna Mohan Rao and Panitapu Bhramara Department of Mechanical Engineering JNTUH, College of Engineering, Hyderabad, India agholamian.mojtaba@yahoo.com, bkmrgurram@jntuh.ac.in, c bhramara74@yahoo.com Key Words: Squirrel Cage Fan, Forward Blade, Diffuser Inlet, Flow pattern and Efficiency, Numerical Simulation Abstract.
Recently using the CFD calculation methods with sufficient related tools for finding the flow pattern and related parameters, applying modifications and representing proper solutions, has being increased.
A modern approach for finding out the flow pattern and properties, that recently has got a popular method, is use of CFD method with appropriate tools.
Simulation Fan Geometry and Mesh Generation.
[8] Bhzadmehr, A., Mercadier, Y., Galanis, N., Sensitivity Analysis of Entrance Design Parameters of a Backward-Inclined Centrifugal Fan Using DOE Method and CFD Calculations, J.

Numerical Simulation and Analysis of Low Hysteresis Brush Seals Jiadong Chi1, a, Zhili Wang1,a and Like Li1,a 1School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China ajarod_chi@163.com Keywords: brush seal; CFD; aerodynamic force; contact force; bristle deflection; size parameter Abstract.
Lelli and Chew [8.9] combined the CFD model with a mechanical model and obtained bristle deflections in the axial-radial plane.
In this paper,used the anisotropic porous medium model, computed by CFD soft FLUENT,the velocity field and the real aerodynamic loads on each node of the bristles are available.
CFD Model The bristles are regarded as porous medium.
Huang: Low Hysteresis brush seal numerical simulations, Journal of Beijing University of Aeronautics and Astronautics, 34(9), (2008), pp. 1080-1083