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Use numerical simulation method for the verify and analysis of the designed nozzle.
The numerical simulation results have shown that when the gradient of test section entrance is greater than 0.5 mm, the impact on flow field of test section can not be ignored.
FLUENT software is a large scale CFD simulation software, the calculation grid used the GAMBIT quadrilateral mesh and had an encryption processing on the wall.
Numerical simulation method was used to verify the design No2 nozzle.
Fig 5 The schematic of installation gradient Fig 6 The calculation model Use the FLUENT software for the numerical simulation analysis.

Numerical Simulation of Wind Pressure Distribution on Structure Roofs with Suspension Solar Panels Ying Zhou a and Qilin Zhang b Department of Building Engineering, Tongji University, Shanghai, P.R.China amyownsecret@126.com, b qilinzhang0@gmail.com Keywords: Numerical simulation, wind pressure distribution, structure, solar panels Abstract.
Wind tunnel tests often need expensive fee and long time but CFD calculation is rather efficient[1,2].
The results of numerical simulation, such as the time histories of the structure displacements, velocity and acceleration are obtained.
Distributed pressure coefficient nephogram of single roof when wind direction is 90° Conclusion The wind pressure acting on the sloping roof have been investigated based on a series of numerical simulations.
And some beneficial results are obtained from the numerical simulation.

The Vehicle Dynamical Analysis of a High-speed Train Passing through a Tunnel FENG Zhi-penga , ZHANG Ji-ye b and ZHANG Wei-hua Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China a zhipengfeng1@163.com, b jyzhang@home.swjtu.edu.cn Key words: Tunnel; High-speed train; CFD; Vehicle dynamics; Aerodynamics force Abstract.
With the numerical simulation, the variation of aerodynamic forces was obtained.
By applying the computational fluid dynamics (CFD) and the computational multi-body systems dynamics, the process of a train traveling through a tunnel at the speed of 350km/h was simulated numerically.
Figure 4 shows a typical time-pressure curve of the surface measuring point on train body which Figure 4 (a) for the simulation result and Figure 4 (b) for the test result.
[5] Masahiro SUZUKI, Atsushi IDO, Yutaka SAKUMA, Hiroshi KAJIYAMA: Full-Scale Measurement and Numerical Simulation of Flow around High-Speed Train in Tunnel.

Numerical Modelling of Swirl-Stabilized Turbulent Lean Non-Premixed Flames PARRA Teresa1,a*, PASTOR David1,b, PÉREZ Ruben2,c, MOLINA José3,d 1Escuela de Ingenierias, Paseo del Cauce 59, 47011 Valladolid, Spain 2ICAI, Calle de Alberto Aguilera, 25, 28015 Madrid 3University of Alicante, San Vicente del Raspeig, Alicante, Spain amtpsteneriffa@gmail.com, bpsdcvilla2014@gmail.com, cjrubepd@gmail.com, djmmj1915@gmail.com Keywords: CFD, reactive flow, turbulent flow, swirl Abstract.
Numerical simulations have been performed to analyze the interaction of confined coaxial high-swirl jets in both cases: isothermal and reactive flows.

Numerical Simulation of Bio-oil Emulsion Combustion In the Direct-flow Combustor Qi Wang 1, a 1 College of metrological Technology and Engineering, China Jiliang University, Hangzhou, 310018, P.R.China awangqi@cjlu.edu.cn Keywords: Direct-flow combustor, Emulsification, Bio-oil, Combustion, Numerical simulation.
In this paper, the combustion characteristics of bio-oil and diesel emulsions were simulated by using CFD method.
In this simulation, wall is assumed as the boundary of heat convection.
Simulation Results Temperature Field and Velocity Field Distribution.
Because the simulation of three fuels was under constant flow rate, this ignition delay was caused by the bio-oil addition.

In this sense, this work proposes to numerically investigate the non-isothermal multiphase flow of a stream of ultraviscous heavy oils containing water and natural gas in submerged risers (catenary) via numerical simulation (ANSYS CFX 11.0).
Geometry and Mesh Figure 1 illustrates the three-dimensional structured mesh (800, 240 tetrahedral elements) generated in ICEM CFD, representing the physical domain of study.
The properties of the fluids used in the simulation are presented in Table 1.
The results of the simulation showed that the heavy oil has a preferred way through the center of the pipe and the other phases have a preferred way for the periphery of the pipe.
Bonizzi, R.I, Issa, On the simulation of three-phase slug flow in nearly horizontal pipes using the multi-fluid model, International Journal of Multiphase Flow 29 (2003) 1719-1747

In order to support this idea, effective C/Si ratio was calculated by a multiphysics simulation software [7] with SiC CVD reaction analysis module [8].
[7] https://www.esi-group.com/software-services/virtual-environment/cfd-multiphysics/ace-suite/ cfd-ace [8] http://www.str-soft.co.jp/product/cvdsim.html

An ideal strategy of operation can be generated by analyzing the results of the simulation.
The most exact approach to model the entire process is the use of Computational Fluid Dynamics (CFD).
Steady CFD simulations are used to increase the quality of the process model like determining the heat transfer by different operation modes.
The mass per charging is increased by 100 kg at every simulation run.
Konferenz ASIM/GI-Fachgruppen: Simulation technischer Systeme, in Lippstadt.

Simulation Research on Matching of Spray and Combustion Chamber Geometry in Diesel Engine Chengcheng Zhang1, a, Qian Wang1, Zhixia He1 and Ping Jiang1 1College of Energy and Power Engineering, Jiangsu Univ, Zhenjiang, Jiangsu, China azcc_cool@126.com Key words: Diesel Engine; Combustion Chamber Geometry; Spray; Combustion Abstract: In order to investigate the influence of combustion chamber geometry on spray and combustion characteristics in diesel engine, universal CFD software STAR-CD is applied to simulate the combustion processes in three different types of combustion chambers of diesel engine.
Fig.4 The dynamometer card comparisons of test and simulation.
The dynamometer card comparisons of test and simulation is shown in the Fig.4.
[2] Jian ZHU.et.al,Numerical Simulation on the Effect of Combustion Chamber Geometry on Diesel Engine Combustion Process.
Development of methodology for spray impingement simulation [C].SAE 950283.

Numerical Simulation Study of Coal Gangue Piles Influence on the Wind Pressure Distributions of Coal Reservoir Roofing Zhixiang Yin1, a, Chengjie Zhang2,b 1Institute of Civil Engineering and Transportation, Liaoning Technical University, Fuxin123000, P.
China alntuyzx@163.com, bzcj198642@126.com Keywords: coal reservoirs, coal gangue, numerical simulation, wind coefficient, influence Abstract.
Therefore, this paper studies the impact of the waste dump on the wind pressure coefficient, based on the proven reliability in the numerical simulation[3].
Numerical wind tunnel method is based on computational fluid dynamics (CFD), and simulates wind field changes around the structure and calculate the wind load on the structure surface by the computer [4].
Examining the k-ω model by means of a wind tunnel test and large-eddy simulation of the turbulence structure around a cube [J].