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Investigation of Numerical Simulation in Combustion Chamber Predictability Rangshu XU 1, a, Ling NIU 1, b, Xinzhu WENG 2, c, Long XU 3, d and Minli BAI 4, e 1 School of Power & Energy Engineering, Shenyang Aerospace University Shenyang 110136, China 2CNR (Dalian) Engine Co., Ltd Dalian 116000, China 3Jinan Diesel Engine Co., Ltd Jinan 250306, China 4 School of Energy and Power Engineering Dalian University of Technology Dalian 116024, China aemail: xurangshu@yahoo.com.cn, bemail:793303693@qq.com, cemail:703217627@qq.com demail:64447929@qq.com eemail: baiminli@dlut.edu.cn Keywords: aeronautical and astronautical propulsion system; predictability model; numerical simulation; aero engine; combustion chamber; CFD Abstract.
An annular combustion chamber of some aero-engine is studied by means of predictive numerical simulation.
A commercial CFD code was adopted on a high performance computing cluster with parallel algorithm and the solving method are high-order discretization scheme.
Calculation Method and Physical Model It uses commercial CFD software to solve N-S equation, energy equation and component transport equation.
(4) Physical parameters varying with temperature make simulation model more similar to practice.

Email: railway_dragon@163.com Keywords: Cavitation, CFD, Bio-inspired, Multiscale molecular modeling, Optimization, Rubber-like materials.
The computational fluid dynamics (CFD) code, ANSYS Fluent 17.0 was used to test the 3D model with assigned boundary conditions to determine the vapor fraction and the static pressure.
Simulation Methodology Molecular modeling.
Although stable at t = 0.5 ns, further simulation did change the nanodroplet’s shape.
Molecular Dynamics Simulation of Polymer–Metal Bonds.

Point exhaust system of side direction .CFD.
This article using CFD software Ansys Fluent to establish three-dimensional numerical model, with CO as tracer gas to analyze influence smoke exhaust efficiency with different shape of smoke dampers.
Fig.4 Model of fire simulation case with one group smoke damper opened(one group one role) Fig.5 Model of fire simulation case with one groups smoke dampers opened(one group four roles) Evaluation index of smoke exhaust effect Exhaust amount of CO through smoke damper Through the analysis of the amount of CO through smoke damper and CO concentration can compare smoke exhaust efficiency of different smoke damper shape.
The above data can be obtained through CFD software post-processing function.
[6] Chi-Ji Lin, Yew Khoy Chuah: A study on long tunnel smoke extraction strategies by numerical simulation,Tunnelling and Underground Space Technology 23 (2008) 522–530[J]

In this paper, the temperature field of freeboard is simulated with computational fluid dynamics(CFD).
For this simulation, the Realizable turbulance model is used
Selection of simulation parameters.
The three coefficients equation is used in this simulation
The simulation results under different operation conditions are shown in Fig. 2.

This approach was validated by comparing the simulation results with computational fluid dynamics (CFD).
A good qualitative match between the expected value and simulation results was observed, indicating that the design method is feasible and reasonable.
CFD Verification High fidelity CFD simulation was carried out for the performance verification.
Fig. 6 Results of the blade’s shape Fig. 7 CFD results of the rotor’s and As can be seen from the CFD results, is about 40% from 4.5 to 5 of TSR value, which could be an acceptable result.
References [1] Janajreh.I, Talab.I, Macpherson.J: Numerical simulation of tower rotor interaction for downwind wind turbine.

Performance Optimization of Building Integrated-Mounted Wind Turbine Marco Milanesea, Arturo de Risib and Domenico Laforgiac Full Department of Engineering for Innovation - University of Salento - Via per Arnesano, 73100 Lecce, Italy amarco.milanese@unisalento.it, barturo.derisi@unisalento.it, cdomenico.laforgia@unisalento.it Keywords: Wind Turbine, Taguchi method, ANOVA, CFD simulations.
Simulation model Geometrical model.
Several studies have used computational fluid-dynamics (CFD) methods to model wind flow around buildings by solving mass and momentum conservation equations [4].
This fact is a clear indication that even for very stable wind direction as it is the case for the CFD simulations, to exploit best the potential energy increase due to speed-up factor the turbine hub has to be located as far as possible from high turbulence regions.
Conclusions In the present work, CFD simulations coupled with the Taguchi method and the ANOVA techniques, allowed to identify the following guidelines for micrositing of BUWT.

CFD Investigation into Internal Flows of PEM Fuel Cell for Optimal Performances Zhijun Penga and Pattarapong Choopanyab School of Engineering and Informatics, University of Sussex, United Kingdom az.peng@sussex.ac.uk, bp.choopanya@sussex.ac.uk Keywords: PEM fuel cell, CFD simulation, internal flow field.
The simulation results show that a parallel flow-field design with appropriate humidity level can compete with the serpentine counterpart and gives considerably lower pressure drop across the cell.
The 3-dimensional, multi-phase models of scaled-down straight parallel and serpentine types PEMFC are developed based on a commercial CFD code to study and compare their steady-state performance.
The simulation results show that a parallel flow-field design with appropriate humidity level can compete with the serpentine counterpart and gives considerably lower pressure drop across the cell.
[6] Dawes JE, et al., Three-dimensional CFD modelling of PEM fuel cells: An investigation into the effects of water flooding, Chemical Engineering Science 64 (2009), 2781-2794

Analysis of a New Ventilation Flow Filed of Ultraviolet Cross-linking Irradiation Box Yiping Lu1, a, Zicheng Jin1, Jiade Han1, Bo Huang1, Guangping Hao1 1School of Mechanical and Power Engineering, Harbin University of Science and Technology, Xuefu Road 52, Harbin150080, China aluyp2010@yahoo.com.cn Keywords: velocity field; pressure field; CFD numerical simulation; irradiation box Abstract.
Then the 3D solid model of the irradiation box was established and the numerical simulation of turbulent flow field was performed due to the principle of Computational Fluid Dynamics (CFD).
After that, the numerical simulation of the new program was performed on the basis of Computational Fluid Dynamics (CFD) principle.
After all the work above, the numerical simulations of the new program were performed.
The numerical simulation results show that the distribution of velocity around the cable is uniform.

The grid accuracy which is required by simulation has been determined then the gas flow status has been analyzed through the comparison between numerical simulation results and empirical calculation results.
Some literature have been reported about flow distribution and pressure drop in stack and electrostatis precipirator using CFD method[1].
CFD is carried out to investigate the flow distribution in flue with inner supports.
Analysis of flow in rotating packed beds via CFD simulations—Dry pressure drop and gas flow maldistribution[J].
Simulation of the operation of an industrial wet flue gas desulfurization system[J].

There are many CFD commercial software such as PHOENICS, CFX, STAR-CD, FIDIP and FLUENT, etc..
Numerical simulation of catalytic converters flow field Fig. 1 shows the structure diagram of the catalytic converter.
Numerical simulation of the porous needs the characteristics and theoretical porous medium [1][2].
Conclusion This paper studies the gas flow pressure characteristics of the porous material by CFD method.  
Song CFD simulation of the effect of upstream flow distribution on the light-off performance of a catalyticconverterEnergy Convers.