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A study on the Aerodynamic Safety of Skirt Board Structure on Maglev Train Liu Zhiqiang1,a , Ma Weihua1 , Luo Shihui1 1Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu Sichuan, 610031 a lzqwind533@163.com Keywords: CFD; Maglev Train; Skirt Board; Aerodynamic Performance Abstract: Utilizing CFD, the influences of skirt board structure on high speed maglev train's aerodynamic resistance and the stability under crosswind are studied.
Simulation analyses are finished with maglev train running at speed of 350km/h for both with and without crosswind.
In accordance with the CATIA physical model of the maglev vehicle, the author builds up a neutral surface model: 1) apply shell63 and establishes quadrilateral meshes with shell63 of different thickness; 2) simulates the different thickness of the skirt board structures; 3) conducts simulation analysis on the structure by the approach of the finite element technique.
It can be gained through dynamics modeling, meanwhile taking into account the influence of the aerodynamic force. 3 The skirt board aerodynamics simulation 3.1 The model building and Division of the Model into Mesh The CATIA model of the maglev train is built up and simplified as the vehicle contour shown in the following Fig.3 Fig.3 The CATIA model of the maglev train Use the GAMBIT to divide the simplified model with IGES format into mesh.

China 2State Key Laboratory of Automotive Dynamic Simulation, Jilin University, Changchun, Jilin Province 130022, P.R.
At present, with widely use of computer technology and computational fluid dynamics (CFD), numerical computation based on CFD can be applied in engineering practice.
So, Numerical simulation method is adopted in calculation of flow field and performance of designed flat hydrodynamic torque converter before and after its blades being leaned.
While CFD is used in calculating the performance of hydrodynamic torque converter, the key is to seek torques working on all impellers.
Flow pressure and speed solution can be obtained by numerical simulation of the flow filed in torque converter.

With the development of computer technology, numerical simulation has been widely used.
Numerical simulation greatly improves the efficiency of system development and reduces experimental costs.
Xiayi Yuan [2] used the numerical simulation methods, studied the cabin heat flow field in detail.
Coupled model Based on the following assumptions, the CFD three-dimensional model of engine cabin has been established: 1.
For further simplifying this CFD model, an interface-fan model has been used as a cooling fan.

Overall pressure drop of pleated aerosol filters The pressure drop of pleated air filters could be expressed as: (5) (6) Since The pleat angle in equation (6) could be expressed as ： Therefore: (7) Where, is permeability of filtration medium,; is tilt angle of filtration medium, is face flow velocity, PRESSURE DROP SIMULATION IN PLEATED FILTRATION MEDIUM Fluid field flow was simulation calculated by CFD software package in this paper.
In order to save computer resources, from the 80 pleats to select the four parts of them to conduct simulation.
Comparison of simulation results and experimental results was shown in table 1.The results of the simulation were different from the results of literature [3], but the simulation results were relatively close to results of experimental tests, it indicating that the simulation method of this paper was acceptable.
The simulation results of RSM turbulence model were in agreement with results of experimental test. 4.
Minimization of Resistance in Pleated-Media Air Filter Designs: Empirical and CFD Approaches.

The computational fluid dynamic (CFD) software AIRPAK was adopted in the evaluations.
The purpose of this paper is to evaluate thermal comfort qualitatively under non-steady state process by experiments and simulation.
Simulation of thermal comfort in the heating process On the basis of experimental research, CFD software AIRPAK was used to simulate the temperature field and thermal comfort field when electric valve was opened or closed.
The indoor two-equation turbulence model was used in the simulation.
Experimental research and simulation results show that the thermal comfort is satisfied for heating system with on-off valve regulation. 2.

The result of the pressure drop which is obtained from simulation shows that the pressure drop in rifled tube is about 1.69-1.77 times much higher than pressure drop in smooth tube.
Therefore, the objective of the present study is to use commercial CFD software, i.e.
The use of commercial CFD software for modeling fluid flow is a very useful tool to predict the flow characteristic in the rifled tube.
Processing Fluent® which is one of the commercial CFD processing software is used as numerical solver for the three-dimensional control volume of rifled tube and smooth tube.
Correlations of single phase friction factor In order to obtain correlations of single phase friction factor for the rifled tube in the present study, the obtained data of friction factor from simulation are fitted as shown in Figure 9.

Numerical optimization of oilfield heating furnace research Jienan Dong *1,a ,Xu Su*2,b,Tong Chen 3,c,Miao Wang4,d,Xiaoxu Li 5,e 1,2,4,5Northeast Petroleum University, China 3Daqing Oilfield Natural Gas Company, China a592153337@qq.com,b392884016@qq.com,ctrqchent@petrochina.com.cn, d55836068@qq.com,e1300555999@qq.com Keywords: Oil Field Heating Furnace, Numerical Calculation,Chemical Reaction Flow Abstract.In this paper,using numerical simulation tools PHOENICS for numerical simulation study is made on furnace gas burning in the hearth, and analyses furnace oil furnace temperature distribution in the flow field characteristics the internal flow field of oil field heating furnace hearth temperature distribution characteristics.
Table 1 Inlet boundary conditions Load condition air mass flow (m3/h) gas flow (m3/h) gas Temperature gas pressure kPa 20% 31 300 21 4.2kPa 60% 90 900 100% 150 1500 Numeric Simulation Results and Analysis 20% load condition.
(4) Because of the complexity of the problem, software functions and the limitations of computer performance, making some calculation results of the numerical simulation and the actual situation has certain deviation.
Computational Fluid Dynamics (CFD) and its application in engineering [J].
Multiple Block Grid Generation in the Interactive Environment [J]. 1990 [6] Fujunwang.Computational fluid dynamics analysis-CFD Software Principles and Applications [M].

CFD Analysis of the EGR Cooler’s Heat Transfer Performance Zhi’en Liu 1, a, Yu Xu 1, b Wuhan University of Technology School of Automobile, Wuhan, China 430070; a lzen@whut.edu.cn, b smile4xy@sina.com Keywords: EGR cooler; Heat-flux coupling; temperature field; Abstract.
A CFD simulation of the performance of an EGR cooler was carried out.
This model based on decomposition methods was applied to the temperature field simulation under different EGR cooler rate and the simulation results were in good agreement with the experimental results.
Pic.7 Simulation result of the EGR gas-outlet part.
We got the average temperature of the outlet through simulation.

Analysis on Vibration Characteristics of Wind Turbine Blade to Improve the Effectiveness through CFD Developed by ANSYS M.
Fig. 1: CD/CL Ratio Variation Vs Angle of Attack CFD Analysis CFD analysis was performed on S1223 airfoil profile with the tip chord length of 10mm in order to analyze the flow behavior around the airfoil body and to calculate the performance coefficients at Re 1.0×105 and at angle of attack 10 degrees.
The simulations were computed in the 3 D software of ANSYS R16.0.
International Journal of Applied Engineering Research, Vol. 10(62) (2015), pp. 112- 117 [25] Xin Jin et al.: Investigation into parameter influence of upstream deflector on vertical axis wind turbines output power via 3-D CFD simulation.
Energies, Vol. 5 (2012), pp. 3425-3449 [30] Mahawadiwar et al.: CFD analysis of wind turbine blade.

In order to explore the performance of precalciner, numerical based on the Computational Fluid Dynamics (CFD) is applied widely in the engineering field due to its accurate numerical prediction for the flow, heat exchange, chemistry reaction and multiphase flow[4].
In this paper, CFD numerical simulations of pulverized coal combustion in precalciner are studied.
To simulation numerically, the structure need to be meshed by Gambit software, as shown in Fig. 3.
Numerical Calculate Process The boundary values in simulation are determined by the thermal data of cement plant with the capacity of the 5000t/d.
Simulation Results Analysis Temperature Field Simulation Analysis.