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Design of impeller of centrifugal compressor for water-air engine Yun Wang1, a , Wei Zhang 1, b 1Department of Nanchang Hangkong University aircraft engineering institute, Nanchang 330063, China a wangyun66@163.com, b zhangwei19870923@163.com Keywords: air-water engine, impellor of centrifugal compressor, CFD.
With 3D design and a 3D CFD solver on it and analysis the results of numerical simulation.
Based on the studies of domestic and foreign aeroengine compressor and centrifugal water pump, this paper aims at the water-air engine, makes an aerodynamic design and research on the engine compressor impeller, and with the application of fluent software makes a numerical simulation of air and water model, according to whose results conduct an analysis and evaluation of the designed centrifugal impeller[2-3].
It can be seen from the results of numerical simulation and post-processing curve, that water-air impeller changes from the original conventional impeller to compound one with compressor and pump taken into account, which meet certain performance requirement.
[4] Tong Yueping, Zhang Shujia and Li Xianhua: Comparison of standard k-ε model and RSM model in 3D simulation in centrifugal pump (2008).

Due to the rapid progress of numerical techniques and computing capacity, the application of computational fluid dynamics (CFD) modelling to building fires has become increasingly widespread.
Heat and mass transfer, as well as the conservation of gas species and smoke particles, can be accurately computed using CFD models with high-quality meshing and a wide range of numerical models.
Consequently, numerical simulations based on CFD modelling are a cost-effective method for bridging the knowledge gap and investigating the system's sensitivity to certain parameters, such as gap widths and material thicknesses [14].
The excel contains data to analyse the simulation on material that has been created.
Results and Discussion TGA experimental and simulation comparison results In this section, a comparison result from simulation and experimental shall be shown.

Lattice Boltzmann Method (LBM), which is based on the mesoscopic models, is a new CFD approach, and it has the congenital superiority and the inestimable development potential in the simulation of complex fluid flow.
The simulation results are consistent with the NASA experiment data.
Lattice Boltzmann Method (LBM) is a new kind of numerical simulation method.
Xu puts forward an optimal low-dispersion low-dissipation LBM schemes for computational aeroacoustics, and shows that LBM is superior to the other CFD methods[4].
In this paper, the simulation is carried out at the low Mach number (Ma=50/340=0.147).

In the present study, the effects of ventilator geometries on the its performance were numerically simulated using the computational fluid dynamics (CFD) program.
Conclusions In the present study, the effects of ventilator geometries on the its performance were numerically simulated using the computational fluid dynamics (CFD) program.
Summary of numerical simulation of the internal flow in the turbo machinery [J].
Improvement of centrifugal fan design using 3d numerical simulation [J].
Performance optimization of centrifugal fan based on numerical simulation[J].

Ltd, Hangzhou, China a zhangqunfeng@263.net Keywords: Hydro-generator; Temperature; Numerical simulation; Conjugate heat transfer Abstract.
Before this paper, the flow of dual radial ventilation system without fan for a hydro-generator has been simulated with parallel computational fluid dynamics (CFD).
Simulation Method Governing equations.
The hexahedral grids of different parts were generated with ICEM-CFD, the grids number of whole calculation domain is 1810,000.
Turbulence Modeling for CFD.

CFD numerical simulation The control equation.The control equations is in reference(Sun et al.2006).
[2] Wang, F.J., Computational fluid dynamics analysis of CFD software theory and application [M].
“The simulation and analysis of the low building wind pressure distribution.”
“The mean wind pressure distribution characteristics numerical simulation in saddle roof.”
“Numerical simulation of wind load shape coefficient.”

The CFD model of single heliostat under typical operating situation was founded by technology of numerical simulation based on standard k-ε model.
With the numerical simulation applied, this paper established heliostat’s CFD model under typical operating modes, obtained the mean wind pressure on heliostat set and the corresponding wind coefficients.
To realize numerical wind tunnel by CFD technique, the first thing is to establish the computation model which should be set large enough so as to avoid the boundary’s oversized influence on the flowing result.
The simulation assumes the air current an incondensable steady flow.
Numerical simulation can effectively simulate flow field around heliostat.

Guardo [10] studied the application of Computational Fluid Dynamics (CFD) software on DSF through the simulation on different ventilation mode.
Guo Yufeng [27] found that the smaller the spacing is, the more waste heat is drained through CFD simulation study with the DSF’s cavity width ranging from 350mm to 550mm.
Yang Huaqiu [33] found that it can effectively reduce the heat transfer coefficient of glass if adopting the high-performance Low-E glass filled with argon gas through the research with the methods of combining optical performance simulation software MQMC and CFD simulation software.
CFD simulation is difficult to be integrated with the building energy simulation software due to its complexity, but some other parameters model, such as lumped parameter model, the thermal and airflow network model, volume model and the zone model are easy to be integrated with building energy simulation software.
Energy comparison of applying CFD software for the simulation of double skin façade [J].Energy and Energy Conservation,2012,11:41-47 [28] Lin Yang.

Simulation Analysis of Temperature Field of Permanent Magnet Governor Yanjie Wang1,a Sanping Zhou 2,b 1,2 Institute of Mechanical Engineering, Xi’an Shiyou University, Xi’an 710065, P.R.
The numerical simulation of fluid flow field and temperature field was carried out with the method of computational fluid dynamics (CFD) and ANSYS-Fluent software.
The numerical simulation of temperature field and flow field was carried out with the method of CFD and ANSYS-Fluent software.
By studying the distribution of flow field and temperature field, the structure was improved, and then conducted the numerical simulation on it.
The numerical simulation of improved model was conducted with the same method and steps, the velocity contours as shown in fig.6.

Study on Wind Load Characteristics of a Super Tall Building Based on Numerical Simulation Lunhai.
Numerical Simulation Models and CFD Methods In this paper, the CFD software FLUNET will be utilized to simulate the three-dimensional and unsteady flow-field around the super-tall building under strong wind conditions.
Totally, about 4200000 grid elements were generated in the present simulation.
Fig.2 shows the instantaneous velocity contours predicted by the present numerical simulation.
Fig.5 shows the generalized wind forces spectra obtained by LES simulation.