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., Urumqi 830000, China 2Department of Thermal Engineering, Tsinghua University, Beijing 100084, China alijingji11@mails.tsinghua.edu.cn, byhr@mail.tsinghua.edu.cn Keywords: SCR, SNCR, CFD, 300MWe, CFB Abstract.
By employing the CFD method, the different urea distributions inside the cyclone are illustrated and the layout of 10 nozzles for each cyclone is optimized to the outer side of cyclone inlet.
Therefore, the Computational Fluid Dynamics (CFD) method is employed to optimize the parameters mentioned above.
Parts of the CFD calculation conditions are summarized in Table 4.
There are also several different simulation cases, but we only take these two typical ones as an example here.

Fire prevention and safety evaluation under the course of construction In this paper, in view of shield machine of the 15.43 meter diameter large section of highway tunnel, the application of Computational Fluid Dynamics (CFD) simulation and the building EXODUS evacuation model analysis.
General model of the shield tunnel The computational fluid dynamics (CFD) model, which is being used to conduct the simulation of the motion of smoke and fume inside shield machine of the tunnel, is calculated out from Fire Dynamic software (FDS4.0) of National Institute of Standards and Technology (NIST) (see fig.2).
CFD simulation analysis model Level3 Level2 Level1 Figure 3.
Three-dimensional version of tunnel CFD model Basic CFD assumptions in the shield tunnel The assumption of The CFD model is that the main temperature both inside and outside is the same, no-ventilation, airflow speed kept as close as possible to zero.
So, the CFD simulation considers all exits as emergency exits, that is, each level is connected by staircases an escape strategy may lead workers to exit via their nearest serviceable exits.

By means of computer simulation for the flow field, the condition of swirling cavitation formation and the shape of cavitation distribution were analyzed with CFD software.
Numerical simulation and experimental verification have been done.
Then, use CFD (Computational Fluid Dynamics) software to create its mesh model by finite volume method.
Simulation result shows that the zone with pressure lower than saturated vapor tension can be formed, and simulation flow rate is 0.671173L/s.
Simulation results of device amplified 10 times is illustrated in Fig. 4.

Ho [5] utilized computational fluid dynamics (CFD) technique to verify Tan’s results and then upgraded the model to full scale.
Fire Dynamic Simulator (FDS) version 5, CFD software is used to simulate the fire and smoke.
Therefore this research investigates this by using CFD software FDS version 5.
From the simulation results, a correlation has been developed to predict smoke contamination occurrence in upper balconies.
Ho, Simulation of smoke contamination in upper balcony by a channelled balcony spill plume in an atrium.

The compared analysis of Surface-panel method with CFD The calculation process of CFD.
The compared results from panel method and CFD result are given in Table1.
Because viscosity is considered in CFD results, which results in the redistribution of propeller trust and duct trust.
First, we compared the surface panel method result with CFD for a ducted propeller to make sure the accuracy of surface panel method.
Vol.23(2008),p.8 [3] YAO Zhen-qiu, GAO Hui, YANG Chun-lei: Numerical Simulation of Interaction between Submarine and Propeller Based on Approach of Sliding Mesh.

With the rapid evolution of performance of computers and computer application technology, CFD has been extensively used in engineering practice[1].
In order to make up the limited data of automotive wind tunnel, virtual wind tunnel based on CFD is used to describe the inner flow field accurately.
Influence of the regulating seam to open type wind tunnel and the accuracy of simulation need to be discussed more deeply with some simulations [2].
The accuracy of simulation results are better than those of Standard k-ε turbulence model[4].
References [1] Stephane Cyr, Kang-Duck Ih and Sang-Hyun Park.Accurate Reproduction of Wind-Tunnel Results with CFD.

OpenFOAM is a free, open source Computational Fluid Dynamics (CFD) software package.
Therefore an attractive alternative is to use Computational Fluid Dynamics (CFD) to obtain the essential hydrodynamic quantities needed for engineering design.
Numerical Simulation Flow simulation is carried out by using OpenFoam.
To get the log of the simulation we need to type pimpleFoam > log.
Nomenclature U∞ Free stream velocity (m/s) D Diameter of the cylinder (m) ν Kinematic viscosity (m2/s) Δt time step (s) Δx Minimum cell distance in x – direction (m) k Turbulent kinetic energy (m2/s2) ε Turbulent dissipation rate (m2/s3) I Turbulent Intensity (%) β Turbulent viscosity ratio Co Courant number CD Co-efficient of drag CL Co-efficient of lift St Strouhal No Uy Velocity in Y- direction (m/s) OpenFOAM Open source Field Operation and Manipulation URANS Unsteady Reynolds Averaged Simulations CFD Computational Fluid Dynamics SIMPLE Semi-Implicit Method for Pressure-Linked Equations PISO Pressure Implicit with Splitting of Operators LES Large Eddy Simulations DNS Direct Numerical Simulation References [1] Achenbach E.

Hydrodynamics Simulation of Gas-solid Flow Field in Conveying Vessel Yue Cuia, Hong Gaob, Jinsheng Sunc , Xu Chend School of Chemical Engineering & Technology, Tianjin University, 300072, China awillyoungcy@163.com, bhgao@tju.edu.cn, cjssun@tju.edu.cn, dxchen@tju.edu.cn Keywords: CFD; Pneumatic conveying; Gas-solid flow.
In this case, the gas-solid flow in the conveying vessel is studied through numerical simulation by FLUENT software.
The initial charge is about half of the volume and non-slip boundary condition is used for this non-steady simulation.
Simulation results show that the dead zone has disappeared and little particle remains.
This CFD model is based on the two-fluid approach combined with the kinetic theory of granular flow.

Stage and steady simulations are carried out in different condition.
The pressure of inlet is calculated by the CFD code.
After optimization, the impeller pressure ratio fits the CFD results perfectly (shown in Fig. 3a ).
The off-design performance result outputted by CCPP is compared with CFD results.
After optimization, the mean streamline analysis results coincide closely with the CFD results.

However, CFD (Computational Fluid Dynamics) became an important tool to simulate diesel working process.
In this paper, multi-dimensional transient numerical simulation of working process of diesel engine was done based on computational fluid dynamics.
The simulation analysis of the flow characteristic in diesel engine and was carried by using CFD software.
In numerical simulation, the rationality of the meshing directly affects the accuracy of the calculation results.
Analysis Result of Simulation.