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The Effects of Environment Wind on Heat Transfer Performance of Direct Air Cooled Island and Its Improvements Pei GAO a , Xuelei Zhang, Xinwei YU School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China agaopei88633@163.com Keywords: Air-cooling island; Windy conditions; Windproof net; Air-cooled Condenser Cell; Numerical simulation Abstract.
Using a CFD software, the numerical simulation of a 2×300MW direct air-cooled unit is done by multi-stage modeling method. the effect of the environmental wind on the heat-exchanging performance of the air-cooling island is analyzed by numerical simulation.
Fig.6 Under different wind speed change of volumetric efficiency Conclusions Taking 300MW direct air-cooled unit as an example, the effect of the environmental wind on the heat-exchanging performance of the air-cooling island is analyzed by numerical simulation.
References [1] Zhou Lan xin, Bai Zhong hua,Li Wei hua,et al.Numerical simulation for the effects of natural wind on heat exchange efficiency of air-cooled condenser[J].Journal of Power Engineering, 2008, 28(1): 104-107 [2] Zhao Wan li, Liu Pei qing.
Experimental researches of the effect of environmental wind on thermal recirculation under the tower of direct air cooled system[J].Journal of Power Engineering, 2008, 28(3), 390-394 [3] Zhou Lan xin, Li Jian bo, Li Wei hua, et al.Numerical simulation of direct air cooling units’ condenser added lower wind break[J].Journal of Power Engineering, 2008, 28(5): 744-747 [4] Zhang Xue lei , Wang Jin ping .

Fig.1 The sketch map of Two-dimensional Fig 2 Finite element model o Finite element method ANSYS－FLOTRAN CFD is an advanced tool used to analyze the two and three dimensional flowing fields, and to solve the problem of nature convection[3,4].
Conclusions The distributions of the stream field and the temperature field caused by the point heat source within two-dimensional enclosure of small size, in different tilt states, are obtained by using the finite element method and the software of ANSYS－FLOTRAN CFD.
[4] Guoqiang Wang, Numerical simulation and practice on ANSYS [M], Xi’an: Northwest Industry University Press, 1999.221.

And the detailed comparison between numerical simulation and wind tunnel test is given.
The distribution of surface wind pressure and wind speed of Hangzhou bay bridge, offshore platform and sightseeing tower is numerically simulated based on Fluent of professional CFD software in this paper.
Numerical simulation Mathematical modeling.
Numerical simulation of laminar flow past a circular cylinder [J].
Numerical Simulation of Steady Flow around a 3D High-rise Building[J].

With the help of CFD.
The numerical simulation method can solve the actual problem.
Numerical simulation of steady flow in vortex pump.
Optimization design and test of vortex pump based on CFD orthogonal test.
CFD-PBM coupled calculation on liquid-solid two-phase flow field in a vortex pump.

The measured temperature values are compared with the results obtained from numerical simulation of the dynamic heat transport using non-stationary boundary conditions.
The value of heat flux determined by numerical simulation at the point between the columns is the same as the measured mean value of the local heat flux.
All results of simulation calculations have got sufficient accuracy.
Lausova, Experimental Measurement and Numerical Simulation of Dynamic Thermal Performance of External Timber Frame Wall.
Blejchar, M Bojko, M Kozubkova, CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles, Fuel. 2014, vol. 118, pp. 107-112, ISSN 0016-2361, DOI: 10.1016/j.fuel.2013.10.064.

Application of Computational Fluid Dynamics for Study of the Occurrence of Aerodynamic Effect for its Application in the Construction of Electric Race Car GRABOWSKI Łukasz a, BAIER Andrzej b, BUCHACZ Andrzej c, MAJZNER Michał d and SOBEK Michał e Silesian University of Technology, Gliwice, Poland, The Faculty Of Mechanical Engineering, Institute Of Engineering Processes Automation and Integrated Manufacturing Systems Konarskiego 18A, 44-100 Gliwice, Poland alukasz.grabowski@polsl.pl, bandrzej.baier@polsl.pl, candrzej.buchacz@polsl.pl, dmichal.majzner@polsl.pl, emichal.sobek@polsl.pl Keywords: aerodynamics, CAD, CAE, FEM, CFD, electric car, Kammback, race car, greenpower, realize shape, freeform modeling.
For study of aerodynamics, Ansys Fluent CFD software were used, using the license of Department of Theoretical and Applied Mechanics, located at the Faculty of Mechanical Engineering in Silesian University of Technology.
FEM mesh around analyzed shape with influence zone For analysis CFD method using Finite Element Method were used.
Baier, Virtual Simulation of Mechatronics Laboratory, Solid State Phenomena. 147-149 (2009) 930-935

Performance analysis of the new helicopter-lift device Yueming Yang, Qinyu Yang, Jinbo Yao, Yuankai LI Air Force Aviation University, Changchun, 130022, China email:cyym1@126.com Keywords: Helicopter; Lift device; Aerodynamic characteristics; Numerical Simulation Abstract.
Based on 2D N-S equations and Spalart-Allmaras turbulence model, the device numerical simulation of two-dimensional aerodynamic characteristics.
This paper established a simplified model of the lift device, and its two-dimensional CFD numerical simulation and aerodynamic characteristics.
Simulation used solver; fluid material to the ideal gas; momentum using second-order upwind discretization scheme; pressure and velocity coupling the SIMPLE algorithm; airfoil surface is non-slip adiabatic boundary.
Beijing: 2005.9.1 [4] Hanzhan Zhong, Wang Jing,Lan xiaoping.FLUENT fluid engineering simulation and application examples [P].

However, the simulation faces some difficulties.
Usually, the mishandling of grids will lead to the failure of simulation.
The computational accuracy of heat transfer in wall is of great importance to the precision of simulation.
The simulation result The first thermal boundary condition.
[2] Zhousan Cunshang:CFD and building environment design(China Architecture & Building Press, 2007)

This book covers these topics: Acoustics and Noise Control, Aerodynamics, Applied Mechanics, Automation, Mechatronics and Robotics, Automobiles, Automotive Engineering, Ballistics, Biomechanics, Biomedical Engineering, CAD/CAM/CIM, CFD, Composite and Smart Materials, Compressible Flows, Computational Mechanics, Computational Techniques, Dynamics and Vibration, Energy Engineering and Management, Engineering Materials, Fatigue and Fracture, Fluid Dynamics, Fluid Mechanics and Machinery, Fracture, Fuels and Combustion, General mechanics, Geomechanics, Health and Safety, Heat and Mass Transfer, HVAC, Instrumentation and Control, Internal Combustion Engines, Machinery and Machine Design, Manufacturing and Production Processes, Marine System Design, Material Engineering, Material Science and Processing, Mechanical Design, Mechanical Power Engineering, Mechatronics, MEMS and Nano Technology Multibody Dynamics, Nanomaterial Engineering, New and Renewable Energy, Noise
and Vibration, Noise Control, Non-destructive Evaluation, Nonlinear Dynamics, Oil and Gas Exploration, Operations Management, PC guided design and manufacture Plasticity Mechanics, Pollution and Environmental Engineering, Precision mechanics, Mechatronics, Production Technology, Quality assurance and environment protection, Resistance and Propulsion, Robotic Automation and Control, Solid Mechanics, Structural Dynamics, System Dynamics and Simulation, Textile and Leather Technology, Transport Phenomena, Tribology, Turbulence and Vibrations.

It is the numerical simulation of the thermal properties of a special polygonal collector plate with hole in air-heating.
This study is the numerical simulation of the thermal properties of a polygonal collector plate with hole by using of the Fluent's ray-tracing solar load model.
In order to facilitate the simulation, for the physical model make the following simplifying assumptions: (1) make a R = 10mm holes in a round type on collector.
Figure 3 shows the overall distribution of the temperature field of the collector plate in simulation.
A CFD heat transfer analysis of the transpired solar collector under no-wind conditions.