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Online since: October 2010
Authors: Qing Chang Meng, Zhi Hong Zhang, Ju Bin Liu
Kunz[18-20], as representative, constructed a preconditioned, homogenous, multiphase, unsteady
Reynolds Averaged Navier-Stokes scheme (RANS), and developed a Computational Fluid Dynamics
(CFD) method to simulate the supercavitating flow.
Multiphase CFD modeling of developed and supercavitating flows[R], Supercavitating Flow, von Karman Institue, Brussels Belgium, 2001, 269-312
The numerical simulation of supercavitatoin around projectiles from subsonic to supersonic[J], Journal of Projectiles, Rockets, Missiles, and Guidance, 2009, 29, 5, 166-169(in Chinese)
Dynamic processes of supercavitation and computer simulation[R], Supercavitating Flow, von Karman Institue, Brussels Belgium, 2001, 239-268
Computer simulation of unsteady supercavitating flows[R], High Speed Body Motion in Water, Kiev, Ukraine, 1997, 225-234
Multiphase CFD modeling of developed and supercavitating flows[R], Supercavitating Flow, von Karman Institue, Brussels Belgium, 2001, 269-312
The numerical simulation of supercavitatoin around projectiles from subsonic to supersonic[J], Journal of Projectiles, Rockets, Missiles, and Guidance, 2009, 29, 5, 166-169(in Chinese)
Dynamic processes of supercavitation and computer simulation[R], Supercavitating Flow, von Karman Institue, Brussels Belgium, 2001, 239-268
Computer simulation of unsteady supercavitating flows[R], High Speed Body Motion in Water, Kiev, Ukraine, 1997, 225-234
Online since: May 2012
Authors: B. Lv, X.F. Yang, W.L. Wei, Y.L. Liu
Yang
Institute of Hydraulic Engineering ,Xi’an University of Technology,Xi’an, China
wei_wenli@126.com
Keywords: characteristics; CFD simulation; Water drop falling
Abstract: In this paper, a numerical two-phase flow model combining with the Realizable k–ε turbulent model for compressible viscous fluid is presented for the computation of water drop falling characteristics; and the equations are solved with the finite volume method.
The results of this simulation are presented in Figs.3.
The results of this simulation are presented in Figs.3.
Online since: June 2008
Authors: Wei Long Yin, Qi Jian Sun, Bo Zhang, Jing Cang Liu, Jin Song Leng
The simulation is carried out with the free stream velocity of 0.6 M, pressure of 1 bar, and air density
1.225 kg/m3 at 5
0 angle of attack by using FLUENT software.
CFD analysis of the wing in the high transonic speed shows that the morphing in chordwise can make a significant contribution to the critical mach number as shown in Fig.6.
CFD results indicated the maximum mach number reduces with the chord increasing.
CFD analysis of the wing in the high transonic speed shows that the morphing in chordwise can make a significant contribution to the critical mach number as shown in Fig.6.
CFD results indicated the maximum mach number reduces with the chord increasing.
Online since: September 2011
Authors: Huan Chen, Sheng Ji Liu, Jian Lin Ge, Dong Tang
NOx and Soot Emissions Numerical Simulation of Diesel Engine Fueled with Biodiesel
Jianlin Ge1,a, Dong Tang2,b, Huan Chen3,c, Shengji Liu4,d
1,2,3,4School of Automobile, Jiangsu University, Zhen Jiang 212013, China
agjl465893@qq.com, bdtang@ujs.edu.cn, c371045690@qq.com,dliushengji@126.com
Key words: Non-road diesel; Bio-diesel; Emission; Numerical Simulation
Abstract: The three dimensional numerical simulation on NOx and soot emissions was carried out on 186 FA diesel engine fueled with pure diesel and B20 fuel using CFD software Fire v2008 and the generating rule and distribution of NOx and soot of two fuel was described.
There has been a lot of research on bio-diesel at home and abroad, mainly in the aspect of bio-diesel combustion and spray characteristics[1-3], but it’s less in research on multi-dimensional numerical simulation of bio-diesel engine blends.
In this paper, it was carried out on small biodiesel blended using AVL's FIRE software with diesel combustion process simulation and numerical analysis of their emissions, improving emissions and verifying it according to the conclusions.
Mesh Set up and Calculation Model Use air-cooled diesel engine 186FA-type prototype for the simulation, the main technical parameters in Table 1.
The tests show that Bosch smoke opacity of B0 fuel and B20 fuel is 1.6 and 1.9 respectively, at full speed and full load, and the results are the same as the simulation predicted results.
There has been a lot of research on bio-diesel at home and abroad, mainly in the aspect of bio-diesel combustion and spray characteristics[1-3], but it’s less in research on multi-dimensional numerical simulation of bio-diesel engine blends.
In this paper, it was carried out on small biodiesel blended using AVL's FIRE software with diesel combustion process simulation and numerical analysis of their emissions, improving emissions and verifying it according to the conclusions.
Mesh Set up and Calculation Model Use air-cooled diesel engine 186FA-type prototype for the simulation, the main technical parameters in Table 1.
The tests show that Bosch smoke opacity of B0 fuel and B20 fuel is 1.6 and 1.9 respectively, at full speed and full load, and the results are the same as the simulation predicted results.
Online since: May 2012
Authors: Shuai Shao, Cheng Zhe Jin, Jia Chao Yan
Combustion Simulation on Fuel oil-mixture gas
Converter Based on FLUENT
Jiachao Yan a , Shuai Shao and Chengzhe Jin
Shenyang Ligong University, Shenyang, China, 110159
ayanjc01@sina.com
Key words:Heavy oil exploitation; converter; combustion simulation
Abstract.
(11) The simulation analysis of combustion chamber components transmission and gascombustion ANSYS FLUENT analysis software which is a universal CFD software used to simulate complex flow of the range of incompressible to compression.
The simulations results show that the combustion chamber design meet the technical requirements.
Based on ANSYS FLUENT analysis software,the components transmission and gas combustion simulation to the combustion chamber in fuel-the mixture converter.The simulation results of a series of simulation get chart, such as temperature contour map and mix specific heat contour map.
The mean temperature (468.4359K) and velocity (490.4908m/s) of the exit are confirm in the simulation analysis.The simulation result, determine the combustion chamber design meet the design requirements.
(11) The simulation analysis of combustion chamber components transmission and gascombustion ANSYS FLUENT analysis software which is a universal CFD software used to simulate complex flow of the range of incompressible to compression.
The simulations results show that the combustion chamber design meet the technical requirements.
Based on ANSYS FLUENT analysis software,the components transmission and gas combustion simulation to the combustion chamber in fuel-the mixture converter.The simulation results of a series of simulation get chart, such as temperature contour map and mix specific heat contour map.
The mean temperature (468.4359K) and velocity (490.4908m/s) of the exit are confirm in the simulation analysis.The simulation result, determine the combustion chamber design meet the design requirements.
Online since: May 2012
Authors: Shu Hong Liu, Yu Jun Sha, Yu Lin Wu, Yi Zhang Fan, Zhi Gang Zuo
This paper presents numerical simulations on two assembly modification methods for one annular casing.
Fig. 1 Original pump Fig. 2 Flow passage of the original pump Fig. 3 Schematic for casings of method one Fig. 4 Schematic for casing of method two CFD Simulation Mesh Details.
Simulation Settings.
Simulation settings are listed in Table 1.
Fig. 6 shows efficiency comparison between experimental results (given by some factory) and simulation results, which proved that these simulations could provide reasonable prediction for hydraulic performance.
Fig. 1 Original pump Fig. 2 Flow passage of the original pump Fig. 3 Schematic for casings of method one Fig. 4 Schematic for casing of method two CFD Simulation Mesh Details.
Simulation Settings.
Simulation settings are listed in Table 1.
Fig. 6 shows efficiency comparison between experimental results (given by some factory) and simulation results, which proved that these simulations could provide reasonable prediction for hydraulic performance.
Simulation Study on the Radiant Tube Transferring Characteristics for the Gas-Infrared Heated System
Online since: November 2012
Authors: Ke Qin Gong, Da Ying Zhang, Wei Dong Zhuang
Simulation Study on the Radiant Tube Transferring Characteristics for the Gas-infrared Heated System
Daying Zhang1,a, Weidong Zhuang1,band Keqin Gong2,c
1College of Engineering, Heilongjang Bayi Agricultural University, Daqing 163319, China
2Civil Engineering College, Northeast Petroleum University, Daqing 163318, China
azdy004@163.com, b81nd@163.com, Cgkqdqpi@126.com
Keywords: Gas-fired radiant heating, Numerical simulation, Temperature distribution
Abstract.
The numerical simulation for radiant tube heat transferring process of the gas-infrared heated room was finished.
Physics Model of Building A numerical simulation on a gas heating plant was processed.
CFD software is adopted to simulate the indoor temperature field, and the indoor temperature distribution of this plant are shown in Fig.1~ Fig.6.
The numerical simulation for radiant tube heat transferring process of the gas-infrared heated room was finished.
Physics Model of Building A numerical simulation on a gas heating plant was processed.
CFD software is adopted to simulate the indoor temperature field, and the indoor temperature distribution of this plant are shown in Fig.1~ Fig.6.
Online since: September 2013
Authors: Ting Chen, Li Li Wu, Chuan Xu, Xiu Qing Wang
The size of this simulation area is 200 mm × 30 mm, as shown in Fig. 2.
The simulation area is divided by the software Gambit.
The Computational Fluent Dynamics (CFD) software Fluent is used to set the boundary conditions.
The standard k-ε model is used in the simulation.
After 5954 iterations, the simulation converges.
The simulation area is divided by the software Gambit.
The Computational Fluent Dynamics (CFD) software Fluent is used to set the boundary conditions.
The standard k-ε model is used in the simulation.
After 5954 iterations, the simulation converges.
Online since: March 2010
Authors: Zhao Xia He, Lan Liu
The unsteady aerodynamics associated with this microrobot was studied by
using the method of computational fluid dynamics (CFD).
On the basis of numerical simulation, the Fluid-Structure coupling mechanics for flexible flapping-wings were studied and discussed.
According to the practically developed flapping-wing microrobot, a 2-D simulation model for flexible flapping-wings was established.
In the foundation of the numerical simulation, the variations of different parameters of the flapping microrobot were investigated, such as flapping amplitude, pitch amplitude and flapping frequency.
Finally wind tunnel experiments and flying test verified results of numerical simulation.
On the basis of numerical simulation, the Fluid-Structure coupling mechanics for flexible flapping-wings were studied and discussed.
According to the practically developed flapping-wing microrobot, a 2-D simulation model for flexible flapping-wings was established.
In the foundation of the numerical simulation, the variations of different parameters of the flapping microrobot were investigated, such as flapping amplitude, pitch amplitude and flapping frequency.
Finally wind tunnel experiments and flying test verified results of numerical simulation.
Online since: December 2012
Authors: Xian Yi, Kai Chun Wang, Hong Lin Ma, Kun Chen
Numerical arithmetic, which based on CFD method and is used for design configuration and shape of an icing prober is given.
First, build numerical method for design based on the CFD method; Second, develop the advanced ice sensors according to the optical property of ice; Third, design the aerodynamic shape of the prober to assemble the ice sensor.
Fig.3 Configuration of the prober and the sketch of the wind turbine installed with the prober Simulation of Detection Effects.
The diameter of water droplet for simulation is 20μm, 40μm and 100μm.
First, build numerical method for design based on the CFD method; Second, develop the advanced ice sensors according to the optical property of ice; Third, design the aerodynamic shape of the prober to assemble the ice sensor.
Fig.3 Configuration of the prober and the sketch of the wind turbine installed with the prober Simulation of Detection Effects.
The diameter of water droplet for simulation is 20μm, 40μm and 100μm.