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The effect of the independent geometrical parameters on the performance of diesel engine has been studied by using CFD code AVL FIRE.
The discipline how the engine performance is influenced by the independent parameters is studied by using CFD code AVL FIRE 2008.
These series of combustion chambers are simulated by using 3D CFD code AVL FIRE 2008.
(a) Comparison of mean cylinder pressure between simulation and experiment, (b) rate of heat release on ω type and double swirl combustion chamber Figure 9.
[2] Shahrokh, Hajireza, “Application of CFD Modeling in Combustion Bowl Assessment of Diesel Engines Using DoE Methodology”, SAE paper 2006-01-3330

Solidworks has been used to design and simulation as well.
In this report not shown everything, only a fraction to show simulation results.
Fig. 3, 4, 5, and 6 are examples of simulation results.
Considering the results of fisual of simulation models, further described the results of the change of gas pressure in the combustion chamber.
CFD Analysis of Gas Exchange Process in a Motored Small Two-Stroke Engine, J. of Applied Science 11(1) (2011) 36-45

Optimization on the Structure of Ceramic Nozzles by FLUENT Simulation Mingwei Ding1, a, Changjing Fu1,b and Sibei Yin1,c 1Shandong Labor Vocational and Technical College, Jinan,Shandong,250022,China ad_mw305@163.com, bfuchangjing@ sdlvtc.cn, cyinsibei@ sdlvtc.cn Keywords: Nozzle ; Fluid simulation; Gas-solid two-phase flow Abstract.
The simulation results have a good agreement with the experimental results.
It carried out the flow field analysis of blast nozzles of different structures, with the thought of CFD and computer simulation, it can analyze the dynamic and static performances of grain conveniently and efficiently [1].
CFD geometric modeling and meshing Consider the complex shape of the computational domain, when using the GAMBIT to divide gridding, we adopt unstructured grid.
This result is consistent with the simulation analysis.

The effect of boundary conditions on simulation of horizontally homogeneous atmospheric boundary layer X.L.
In the simulations of horizontally homogeneous ABL, some useful guidelines for appropriate boundary conditions have been provided.
The governing equations are solved using commercially available CFD code, Fluent, with the segregated method.
As explained by Richards and Norris [1], the spike occurring near the ground results from the numerical discrete scheme used in CFD code.
Schlunzen et al: Best practice guideline for the CFD simulation of flows in the urban environment.

In this paper we evaluate the evolution of 3D-CAD based development processes based on geometry generation, conceptual design and simulations tools.
Kinematic simulation requires knowledge about position, contact surfaces and the type of connection used while FE simulations require the precise connection of each component and external conditions [10].
The current strategies include the integration of standalone simulation software in packages of software which include CAE and CFD.
Fig. 5 CAD model of a front wing race car (Inclination angle of 115° of the main wing) The CFD simulations was done on a basis of a epsilon standard wall function turbulence model combining various meshing strategies to determine the effect of the grid on the convergence of iterative calculations [13].
CFD usage allows the precise simulation of various condition of speed by producing flow fields and surface data that are difficult to obtain from real experiments.

The pressure drop and averaged heat transfer coefficient of seven rows with five tubes in each row with integral wake splitter has been determined by means of 2-D simulation using commercial computational fluid dynamics (CFD) code Fluent.
Simulations have been carried out at Reynolds number based on tube diameter from 5000 up to 27800.
The comparison between CFD and Experimental results can provide that both of cases have taken same behaviour carve.
Susan , Numerical simulation of fluid field and heat transfer of streamlined cylinder in cross flow, U.S.A. 2005.

In recent years, the variable complexity optimization (VCO) has been one important part of multidisplinary design optimization (MDO) because it can lower the calculation complexity of simulation optimization efficiently [3].
Fig. 1 Turbine blade profile The rapid development of computational fluid dynamics (CFD), especially three-dimensional CFD, makes the simulation results of blade more really.
Table 1 Comparison of total pressure loss coefficient between the origin and the optimized Section Trend Origin Optimized Relative improvement Root ↓ 0.107 0.065 39.25% Middle ↓ 0.094 0.077 18.09% Tip ↓ 0.162 0.121 25.31% Root section Middle section Tip section Fig. 2 Comparison of the three profiles between the origin and the optimized Root section Middle section Tip section Fig. 3 Static pressure of cascades 3 VCO of turbine blade The VCO method is used to enhance the optimizing efficiency because the three-dimensional CFD of turbine blade costs high time complexity.

Using CFD software PHOENICS 3.5, Zhang Jinhua studied the law of the road tunnel fire smoke concentration field and temperature field, in different longitudinal ventilation speed[6].WK Chow[7] only changed the outlet velocity of the air curtain, simulated by CFD the large space using air curtain blocking the flue gas into the atrium from the fire area for two different sources of ignition power in certain large space ventilation rate conditions, and obtained some useful results.
The simulation time takes 300s.
Numerical Simulation on the Effectiveness of Smoke-preventing Single Blowing Air Curtain [D].
Numerical Simulation on the Influence of Air Outlet Angles on the Effectiveness of Smoke-preventing Air Curtain [J].
Numerical simulation on the Tunnel fire smoke flow [J].

In this paper, the velocity fields of two different curvature impeller blades have been comparative studied by a numerical simulation using FLUENT software.
Numerical simulation Model establishment Model shown in Fig.2, the impeller length 200mm, diameter 50mm, 80mm blade chord.
In order to simulate the accuracy of the model flow field at entrance and export, the upper and lower fluid regions have been added, two leaf fan blades were divided for tetrahedral used ICEM CFD meshing software.
Calculation set This model uses a large-scale CFD software FLUENT to do the watershed of the fan blade numerical simulation.
Computational fluid dynamics analysis -CFD software principle and application [M].

For friction disc with complex grooves and solving domain, some computational fluid dynamics (CFD) software is usually used.
Building simulation model Thickness of driving friction disc is 6 mm, inner and outer diameter are 0.15 m and 0.223m, and film thickness is 0.2 mm.
However, if overall friction disc is taken as simulation object, there is a big amount of calculation.
Fig.3 The boundary conditions Simulation and result analysis (1) The rotational speed of driving friction disc is 1500r/min and the slave disc is stationary.
Vols. 468-471, (2012), p591-595 [4] Fujun Wang: Principle and Application of CFD Software(in Chinese), Tsinghua University Press, (2004).