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The effect of the cavity design parameters on the integrated performance parameter net thrust of hypersonic vehicle was investigated by computer numerical simulation methods in this paper.
Therefore, in this paper, we will present the influence of cavity geometric design on the net thrust of hypersonic vehicle by numerical simulation method.
(a) (b) (c) Fig.1 Sketch of Hypersonic Vehicle Computational Method Computational fluid dynamics (CFD) is employed to analyze the influence of cavity geometric design on the net thrust of hypersonic vehicle.
CFD Capabilities for Hypersonic Scramjet Propulsive Flow path Design.
CFD-Based Aeroelastic Analysis of the X-43 Hypersonic Flight Vehicle.

Foshan, China azhongminwan@hotmail.com , bjunhuawan@sohu.com, cjingliuhnist@163.com Key Words: numerical simulation; experimental verification; multi-blade centrifugal fan; bell mouth Abstract.
The experimental verification was conducted for the simulation results and the experimental results shows that the air volume rates increase 4.7 % and 3% respectively, the level of noise is constant.
Wang Jiabing et al[4]calculated the three types of bell mouth on the internal field and the performance of multi-blade centrifugal fan used in floor standing air-conditioner by using the commercial CFD method, get the conclusion that the fan with the inward bell mouth whose exit diameter is larger than the impeller inner diameter shows the best effect.
The inward bell mouth whose exit diameter is larger than the impeller inner diameter and optimized axial height the mold line was used in the work to investigated the whole machine and by using the commercial CFD code FLUENT, the simulation results was analyzed and the optimal case was designed based on the analysis of the numerical simulation result, beside, made a sample and conducted experimental verification.
Conclusion Numerical simulation method was developed to analysis the flow field for design scheme, and experiment was conducted to verify the numerical simulation scheme with good effect, computational fluid dynamics (CFD) technique coupled with experimental investigations method can improve research and invention efficiency.

It seems that CFD and 3-D Green function are more applicable for solving the added resistance problem than traditional methods.
Computational fluid dynamics method In recent years computational fluid dynamics (CFD) has been applied to flows about a ship in waves.
Orihara et al developed a new simulation called WISDAM-X, in which RANS equation and the continuity equation were solved using the finite-volume method in the framework of an overlapping grid system.
Domestic studies increasingly concerned about added resistance in waves with CFD method.
CFD and 3-D Green Function [51] seem to be more reasonable to solve the added resistance in waves.

The thermo-hydraulic performance of the first wall for CH HCSB TMB was investigated, corresponding analysis have been carried out using CFX, a computational fluid dynamics (CFD) code.
The simulation results show that the maximum temperature 565℃ of the FW is slightly above the allowable temperature limit 550℃ of material.
A commercial Computational Fluid Dynamics (CFD) code, CFX, was used for thermo-hydraulic.
In this simulation k-ε turbulence model was used with scalable wall function.
The simulation results show that the corner of the FW is slightly above the allowable temperature limit.

Flow Field Simulation of Fan Nozzle Jet used for Disc Tool Cooling with Fluent REN ZhongWei1,a, SONG Ming1,a, LIU YaFei2,b, LUO LiYing3,cand LIU Yang4,d 1Shenyang University of Technology，Shenyang, P.R.CHINA 2AVIC Guizhou Honglin Machinery Co., Ltd, P.R.CHINA 3Urumqi Weian Registered Safety Engineer Office (limited), P.R.CHINA 4Huainan Gede heavy equipment Co., Ltd, P.R.CHINA arzw9811210@163.com, blyf4669656@163.com, cshadow0311@sina.com, d18241515551@139.com Key Words：Nozzle, tool cooling, flow field simulation Abstract.
In order to study the effects of structural parameters on the spray nozzle, simulation and experiments were performed on injection pressure and surface tension and other factors to the ejection performance of the nozzle.
Fig.5 Nozzle velocity curve of internal and external flow field on axis Fig.6 Velocity distribution of nozzle jet in 100mm target distance and the section Conclusion In this paper, fan nozzle as the research object for the disc tool cooling. physical model of fan nozzle was established by the Solid Works software, and the simulation is carried out.
A Study of Abrasive Water jet Characteristies by CFD Simulation [J].
Wang, Analysis of Computational Fluid Dynamics-Principle and Application of CFD Software [M], Beijing: Tsinghua University Press, 2004.

Z.F.Wang [5] used Computational Fluid Dynamics (CFD) simulation to calculate the air collector thermal performance.
C.J .Wang [6] used CFD to analyze air permeability collector performance.
They found that the simulation results and experimental results match very well.
So, numerical simulation has become one of most important methods to design the efficient and lower cost collectors.
Fig.2 The mesh of collector The simulation was conducted by solar radiation model with software Fluent6.0.

This work presents the effect of V cut and square cut rotors in circular tubes for turbulent heat transfer using computational fluid dynamics (CFD) modeling.
Fig.1: Figure of rotor–assembled strand Numerical Simulation Problem Formulation.
Some important geometry parameters of rotors employed in the simulation are listed in Table 1.
A three-dimensional numerical simulation of the heat transfer and flow resistance was conducted using the FLUENT 6.3.
The CFD model involves numerical solutions of the conservation equations for mass, momentum and energy.

Numerical Study on Flow Characteristics in a Stirring Vessel LIANG Ruquan1,a, JI Junhong1,2,b, Yan Fusheng3,c and HE Jicheng1,d 1Key Laboratory of National Education Ministry for Electromagnetic Process of Materials, Northeastern University, 110819, Shenyang, China 2School of Mechanics and Engineering, Liaoning Technical University, 123000, Fuxin, China 3Research Institute, Northeastern University, 110819, Shenyang, China aliang@epm.neu.edu.cn, bji_jh@163.com, cfusheng_yan@mail.neu.edu.cn, dhejc0432@sina.com Key words: Numerical simulation; Stirring vessel; Desulphurization of molten iron; Flow field Abstract.
In order to improve the desulphurization efficiency of KR mixing method in the process of molten iron refining, the method of CFD was used to analyze the flow field in a stirring vessel.
With the development of modern computing technology, the simulation of CFD provides the high accuracy.

A robust and practical CFD code has been developed.
The VSIAM3 naturally satisfies the conservation constraint imposed on the original dynamic system and provides a robust base to develop CFD models for complex flows in real-case applications.
We have also extended the method to be applicable to moving boundary as well as thermal boundary simulations.
So, the parallel code is flexible and portable for different simulation configurations on any hardware with distributed memory.
Summary We have developed a robust and practical finite volume CFD model, VSIAM3, using both VIA and SIA as the computational variables.

This ensures the correctness of simulation.
For the similarity in structure of V-cone and double-cones studied in paper, the author based on formula form of V-cone expansibility factor and amounts of experiments, doping out the expansibility factor rule of the double-cones meter by CFD.
Numerical Simulation Research Structure and Modeling.
Fig.7 Comparison expansibility factor of the double-cones with other flow-meters Summary The paper conducts a mass of numerical simulation on the double-cones meter with β as 0.4, {TTP}12289 0.5, {TTP}12289 0.6, {TTP}12289 0.7, {TTP}12289 0.8 and 0.9 by CFD, obtaining a prediction formula of the expansibility factor, what’s more, comparing it with other flow-meters.
Experimental Study and Computational Simulation on the Double-cones Flow-meter[J].