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The boundary conditions The entry has been set to mass flow inlet boundary conditions in numerical simulation by CFD, inlet temperature determined by the entrance pressure.The turbulence intensity is 0.1 and turbulent viscosity ratio is 10,and medium for saturated steam.Taken ten exports as pressure outlet boundary conditions,pressuer is 12 kpa,which reflow temperature according to discharge pressure,and flow turbulence intensity is 0.1,and flow turbulent viscosity ratio is 5.The wall choose wall surface boundary conditions,it will choose no slip boundary condition,and heat insulation with the outside world.
The simulation results and analysis In order to balance flow distribution and decreasing the pressure drop in each vapor distributing pipe,simulate the flow field when add chamfering with different angle on the back of exhausted pipe or not ,using the CFD software called FLUENT,the steam flow field of exhaust pipe for a 1000 MW power unit with direct air cooling is stimulated under typical steam turbine conditions,the simulation results are showed as Table 2 and Table 3.
conclusion Analysis of the simulation results, the following conclusions: 1.
[3] Lixing Zhou.Turbulent Numerical Simulation of two-phase flow and combustion.Beijing : Tsinghua University Press, 1991
[4] Zhanzhong Han.FLUENT fluid engineering simulation and application examples.Beijing : Beijing Institute of Technology Press, 2004.

The simulation results obtained are in agreement with the experimental results of Liu et al. [18].
Conclusions 2D simulation of fluidised bed reactor is carried out for biomass gasification in fluidised bed reactor.
Results obtained from the simulation are compared with experimental values.
Bridgwater, CFD modelling of the fast pyrolysis of biomass in fluidised bed reactors.
Shah, Modeling and simulation of an entrained flow coal gasifier.

The final structure parameters were obtained by CFD numerical simulation optimization iterately.
Simulation results show that: The combination vortex pump meet the design requirements.
Numerical simulation and analysis The main geometric parameters of three stage combination vortex pump acquired in table 1.
Then CFD numerical simulation is carried out to optimize the structural parameters of the pump.
“Design and Simulation of Aero-engine High Pressure Centrifugal Pump,” Computer Simulation, vol.28, 2011 pp. 84-87

Sheshathri2, Kamesh2, A.Avinash2 2Student, Sri Venkateswara College of Engineering 1Assistant Professor, Sri Venkateswara College of Engineering *Email: natraj@svce.ac.in Keywords : Engine Emission, SCR, NOx, Urea, Catalyst-TiO2, CFD.
Abstract: The objective of this work is to determine the maximum reduction of NOx emissions by varying the concentrations of urea solution with a reduction catalyst, and optimization of the urea injection by the evaporation of the solution, using the CFD-Fluent solver.
From the simulation results,it was seen that only at 75% and 100% load,the evaporation point of the urea solution was higher than that of the boiling point (423 K), due to complete vaporisation of water. 1.
EXPERIMENTAL AND SIMULATION PROCEDURE Before starting the engine, the urea solution should be prepared for different concentrations of 30%, 32.5% and 35% by weight.
[8] Tamaldin, N., Roberts, C.A., and Benjamin, S.F.(2010) Experimental study of SCR in a light duty diesel exhaust to provide data for validation of a CFD model using the porous medium approach.

ayaozq_just@126.com, bonedollar1@sina.com, c249662902@qq.com Keywords: Ducted propeller, PBCF, Hydrodynamic performance, Numerical simulation.
Numerical Simulation Model.
Fig.2 Division of the compulational domain Fig.3 The grids of duck Mesh is the most important process of CFD simulation calculation, its quality directly affects the precision and efficiency of computation.
The analysis of numerical results The validation of numerical simulation.
[3]OU Li-jian, AN Yuan, The Research Based on CFD of Hydrodynamic Performance for Ducted Propeller, Science Technology and Engineering.2010.7

He also performed CFD simulation of drosophila and compared his results with the dynamic model of drosophila constructed by Dickinson [5].
Figure 1 Schematic of experimental apparatus set-up Numerical Simulation.
Computational simulation was performed to investigate the flow characteristics and vortices structure around the coleoptera's wings using CFD commercial software ADINA-F [R].
Numerical Simulation.
The thin plate motion in the x and y coordinate used in the simulation are shown in figure 4.

Therefore the research on the CFD fire extinguishing simulation is rapidly developing these years.
Only implementing several effective tests associating with CFD simulation, both the cost of the test and the pollution will be highly reduced.
The employed computer simulation software is FDS.
Utilize the computer numerical simulation software to implement the fire extinguishing simulation with the different foam flow rate - 0.5L/min，0.8 L/min，1 L/min，1.5 L/min，2 L/min, etc. respectively.
Reduced-Scale Experiments on the Water Suppression of a Rack-Storage Commodity Fire for Calibration of a CFD Fire Model.

The fabrication of chip and set-up of system are clearly described and simulations also carried out utilizing CFD-ACE to study the electric field strength distribution and the time span when fluid passes through different electric field strengths.
Simulation and Results The Simulations were also carried out on the personal computer using the CFD-ACE to analyze different models.
And simulations were also carried out about this model.
The fabrication of chip and set-up of system were described and simulation of the proposed EP system was also shown in the paper.
Simulations using CFD-ACE were also carried out on different models.

Numerical Simulation of Air Distribution and Particle Movement in a Displacement Ventilated Room Zebei Wang 1,a, Baoqing Wang 1,b, Ronghui Chen1,c, Shu Yao1,d College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China a411173744@qq.com, bwbqchina@163.com, c13609223@njau.edu.cn, dmadkon@qq.com Keywords: displacement ventilated room, numerical simulation, air movement, particle distribution Abstract.
In this paper, the air movement and particle distribution in a displacement ventilation room is studied and analyzed through CFD numerical simulation method.
Results and discussions This paper selects two typical surfaces to describe the results of simulation, including X=1.65m which respects the profile through the center of room; X=0.6m which through the virtual human body.
Conclusions A CFD-based ventilation test method is presented in the study.

In addition, high requirements of equipment to obtain the flow characteristics of ring seals which is costly, it is very difficult to obtain the leakage through experimental method, and based on CFD simulation is often ignored seal ring clearance in most cases.
Thus, the integral model of wear-ring was considered to simulate by CFD and it has great significance to analyze its volume loss [2, 3].
American Baskharone use finite element analysis method for multi-stage pump to simulate internal clearance leakage flow and analyze its impact by way of CFD, and the results compare to the existing model with leakage[ 4].
In summary, the numerical results indicates it more accurate and feasible for submersible well pump simulation.
Zhao: Research on Wear-rings of Centrifugal Pump Based on CFD Cod (MS., Huazhong University of Science, China 2006), p. 27-28, 47-49