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Performance analysis of feeding device of port pneumatic grain unloader in CFD GUO Liwei1, a, LIU Bo2,b 1, 2 College of mechanism and electron engineering, Central South University, Changsha ,Hunan ,China 410075 alevisguo@qq.com, b liuboyh@126.com, Keywords: CFD; Port pneumatic grain unloader; Feeding nozzle; Secondary air.
With refinement of the grid type in detailed section, a better quality of simulation analysis is achieved.
With refinement of the grid type in detailed section, a better quality of simulation analysis is achieved.
Through the numerical simulation analysis of the flow field, the initial design flaws and improved methods is obtained; 2.
Numerical simulation of nozzle flow field analysis based on CFD software is a fast, intuitive design approach can significantly improve the efficiency and accuracy of the test study, shorten product development cycles and reduce the number of product trial.

Recently some attempts to use CFD to predict inertial separator performance can be found.
Pressure drop of wave-plate separators with different vane spacings under various inlet velocities are gained using CFD simulation method , and the result are shown in Fig.7.We can see that pressure drop increase greatly with the increasing of inlet velocity,and under the same inlet velocity, the separator with large vane spacing has lower pressure drop.
The resistance characteristic is drawed in Fig.9 and compared. with CFD result.
Fig.8 Schematic of experimental apparatus and experimental device Fig.9 Pressure drop of separators as function of inlet velocity (layer spacing is 10mm and 12 mm) Conclusions CFD simulation and experiment method are combined together in this study to predict the pressure drops of a kind of wave-plate inertial gas-liquid separator.
Pressure drops acquired by numerical simulation and model experiment agree well, So the numerical simulation method is reliable in the resistance characteristic research of wave-plate inertial gas-liquid separators.

Numerical Simulation of 2D Model of Diffuser for Tidal Turbines Nasir Mehmooda, Zhang Liangb and Jawad Khanc College of Ship Building Engineering, Harbin Engineering University, Harbin, Heilongjiang, China athatsnasir@live.com, bzhangliang@hrbeu.edu.cn, cjawadkhan2008@hotmail.com Keywords: Ducted turbine; Shrouded turbine; Diffuser augmented tidal turbine; Numerical simulation of diffuser; CFD simulation of diffuser Abstract.
The research is essential for utilizing CFD tools for diffuser design for tidal turbine.
Geometry of Diffuser and Boundary Conditions Norimasa’s Bulge type diffuser without brim is selected for CFD simulation.
CFD simulation of 2D model of diffuser has been carried out.
CFD results are compared to experimental results and found in reasonable agreement.

A Subdomain Method for the Aeroacoustic Simulation of a Generic Side View Mirror Lina Huanga, Mingxin Xueb, Hao Dongc, Bo Yangd State Key Laboratory of Automotive Simulation and Control, Jilin University, 5988 Renmin Street Changchun, China alnhuang11@mails.jlu.edu.cn, bsugarxiaoxin@126.com, cdonghao12@mails.jlu.edu.cn, dyang_bo@jlu.edu.cn (Corresponding Author) Keywords: computational aero-acoustics, side view mirror, subdomain, CFD simulations.
With the principal advantage of saving CFD cell numbers, the subdomain LES method would be a perspective way to simulate the aerodynamic noise of complex geometries such as the real automobiles.
In CAA method, both the acoustic sources and the receivers are in the computational domain, the acoustic information can be obtained from the CFD.
This method is performing an aerodynamic steady CFD simulation in the whole domain.
The simulations were carried out using a commercial code, SC/Tetra.

Prediction of Combustion Behavior in a Boiler Fired by Mixture of Vietnamese Anthracite and Coal Gas Using CFD Gia My Tran1,a*, Duc Dung Le2,b Hanoi University of Science and Technology, Hanoi, Vietnam amy.trangia@hust.edu.edu.vn, bdung.leduc@hust.edu.vn Keywords: anthracite-coal gas, composition, unburned carbon, CFD simulation Abstract.
The CFD simulation is used for the zone 1.
The objective of this study is to predict the combustion behavior of single coal and mixing domestic anthracite with coal gas when fired in a downshot furnace operated in Vietnam by using CFD numerical simulation.
All simulations are run K-ε reliable model for turbulent gas phase.
Yu, “A three-dimentional CFD model for coal blends combustion: Model formation and validation”, Fifth International Conference on CFD in the Process Industries, 2006 [12] R.I.

Student, Mahran Dawwa1* 1Constanta Maritime University, Constanta, Romania 1mahrandawwa@gmail.com Keywords: CFD, eddy dissipation model, combustion, diesel engines.
The aim of this study is to simulate the combustion process in the combustion chamber of diesel engines by using eddy dissipation model (EDM) and computational fluid dynamics method (CFD).
The simulation steps and the simulation results will be discussed and illustrated.
Sunnapwar, CFD Modeling and Experimental Validation of Combustion in Direct Ignition Engine Fueled with Diesel, International Journal of Applied Engineering Research, Vol. 1, No. 3, 2010
Anang, Multidimensional CFD Simulation of a Diesel Engine Combustion: A comparison of Combustion Models, Proceeding of the FISITA 2012 world automotive congress, Lecture Notes in Electrical Engineering, 190 (2012) 879-893.

CFD Research and Investigation of 2011 P4/5 Competizione Rear Wing Aldo Pugliese1,a, Yang Zhigang1,b, Li Qiliang1,c 1Shanghai Automotive Wind Tunnel Center Tongji University Shanghai, 201804, China aaldo.pugliese88@gmail.com, b zhigang.yang@sawtc.com, cqiliang.li@sawtc.com Keywords: Race car rear wing; Downforce and Drag; CFD simulations; Slot gap Abstract In order to analyze the influence of the rear wing of a competition race car on the aerodynamics of the whole vehicle, computational fluid dynamics simulations have been performed.
In particular, it has been analyzed through 3D CFD simulations, which kind of contribution the rear wing provides in terms of drag and lift and how the modification of the angle of attack of the two airfoil shape elements and their interactions may influence the aero-performance of the car.
a) Middle and small box b) Tunnel, middle and small box Fig.4: Mesh models of the computational domain Computational method Computational fluid dynamics (CFD) commercial software – Ansys FLUENT has been used to perform the simulation; it solves the three-dimension incompressible Reynolds Average Navier–Stokes equations in finite volume approach.
Configurations 1 and 2 have the same set-up, but simulation has been performed respectively with rotational and non rotational wheels.
CFD study of section characteristics of Formula Mazda race car wings[J].

In the paper CFD is applied to a rotor at stationary hydrodynamic conditions Simulations from the numerical prediction are compared with experimental measurements of the model of MCT which is experimented on in a cavitation tunnel and a towing tank.
Comparisons between experiments and numerical simulations at 5o set angle.
Comparisons between experiments and numerical simulations at 10o set angle.
Comparisons between experiments and numerical simulations at 13o set angle.
For TSR > 7 both CFD simulations tend to over predict the power coefficients for set angles 5°-13°.

CFD simulations have been carried out by combining DPM to predict the erosion rate and particle impaction regions in carbon steel 90° elbow with a diameter of 50.8 mm.
The current research on CFD simulation of erosive wear in literature was performed with discrete element modeling or discrete phase modeling to simulate wear due to erodent impaction [12].
In CFD-DPM, the boundary condition isdefined as an inlet, outlet, and elbow pipe wall.
As the difference in the predicted erosion rate at the outer wall from mesh 2 was less than 2%, in comparison with mesh 3, the CFD simulations for this study were executed considering mesh2.
Vorticity contours of 90° elbow Conclusions Based on the CFD-DPM, a simulation study was performed to scrutinize the influence of fluid viscosity on erosion phenomena of the elbows configurations for liquid-sand flow operating conditions.

Simulation result 2.1 CFX pressure The pressure status of hub and cutter pressed and its pressure distribution can be seen directly (CFX pressure is shown in Fig.3).
The plugin is designed to exchange information between the FEA and CFD calculations to ensure the continuity of stress and shape transformation across the FEA/CFD boundaries.
A thermal coupling simulation is realized through an iterative procedure between the FEA and CFD calculations.
Convergence of the FEA and CFD calculations in the iterative loop is satisfied as in normal individual FEA and CFD simulations, respectively[6,7].
(a) (b) Fig. 5 Total deformation result Conclusion We have proposed a 3D model for numerical simulation of aquatics hub cutter in ANSYS12.