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Online since: November 2012
Authors: Zhong Li, Bo Gao, Ning Zhang, Min Guan Yang
Study on Radial Load in a Centrifugal Pump with Slope
Volute Using CFD
NingZhang1a, MinguanYang1b, BoGao1c, ZhongLI1d
1(School of Energy and Power Engineering Jiangsu University Zhenjiang Jiangsu China)
azhangningwlg@163.com, byangminguan@ujs.edu.cn, cgaobo@ujs.edu.cn, dlizhong@ujs.edu.cn
Key words: Centrifugal pump; Slope volute; Unsteady simulation; Radial load
Abstract.
To estimate radial load on the impeller with slope volute, a commercial CFD code Fluent was used to solve the full 3D unsteady Reynolds averaged Navier-Stokes equations (3D-URANS) for several typical flow rates raging from 60%~150% of nominal flow rate.
Coupled simulation[J].
To estimate radial load on the impeller with slope volute, a commercial CFD code Fluent was used to solve the full 3D unsteady Reynolds averaged Navier-Stokes equations (3D-URANS) for several typical flow rates raging from 60%~150% of nominal flow rate.
Coupled simulation[J].
Online since: July 2014
Authors: Bo Wang, Wan Li Zhang, Huan Huan He, Shi Chuan Su, Shun Dong Zhang, Qiang Zhang
Fig. 1 The planar solid oxide fuel cell stack reported by Jean [3]
Fig. 2 The 10-cells short planar SOFC stack air flow model
The 3D realistic air flow model and CFD Calculation
This paper establishes a realistic 10-cells short planar SOFC stack air flow model with the MEA areas of 75 mm100 mm, shown in Fig. 2, and the air flow model in a unit cell is illustrated in Fig. 3.
Commercial software, FLUENT 6.3 based on the finite volume method is adopted in our CFD calculation[5].
The investigation of the single channel width In this simulation, the total interconnect plane is limited in the region between 73 mm and 75 mm.
Conclusion Realistic 3D 10-cells short planar SOFC stacks are built and investigated through CFD method using the commercial software Gambit and FLUID 6.3.
Commercial software, FLUENT 6.3 based on the finite volume method is adopted in our CFD calculation[5].
The investigation of the single channel width In this simulation, the total interconnect plane is limited in the region between 73 mm and 75 mm.
Conclusion Realistic 3D 10-cells short planar SOFC stacks are built and investigated through CFD method using the commercial software Gambit and FLUID 6.3.
Online since: May 2014
Authors: Jatuporn Thongsri, Wutthinan Suksawaeng
Therefore, our research has focused on using computational fluid dynamics (CFD) software to simulate the airflow in VENA subjected to set conditions.
From literature search, it was found that Ansys Fluent is a comprehensive CFD software suited for simulation of airflow behavior inside an HDD because it has an extensive physical modeling capability needed to model complex airflow, turbulence, and heat transfer in industrial applications [5].
In ANSYS Fluent, a two equation k- ε model is a common turbulence model widely applied in engineering simulation of fluid flow.
The results of the simulation of VENA were compared to those of an HDD in order to determine ways to improve VENA reliability.
Nakamura, Numerical simulation of positioning error caused by airflow-induced vibration of head gimbal assembly in hard disk drive, IEEE Trans.
From literature search, it was found that Ansys Fluent is a comprehensive CFD software suited for simulation of airflow behavior inside an HDD because it has an extensive physical modeling capability needed to model complex airflow, turbulence, and heat transfer in industrial applications [5].
In ANSYS Fluent, a two equation k- ε model is a common turbulence model widely applied in engineering simulation of fluid flow.
The results of the simulation of VENA were compared to those of an HDD in order to determine ways to improve VENA reliability.
Nakamura, Numerical simulation of positioning error caused by airflow-induced vibration of head gimbal assembly in hard disk drive, IEEE Trans.
Online since: February 2011
Authors: Hong Jun Zhu, Qing Kun Jia, Xiao Lu Yang, Bo Shi Qiu
Simulation Analysis of Hydraulic Jet Pump
Hongjun Zhu1,a, Boshi Qiu2,b, Qingkun Jia1,c and Xiaolu Yang1,d
1Department of Petroleum Engineering, Southwest Petroleum University, Chengdu, China
2Drilling Engineering Technology Corporation, Sheng-li oil field, Dongying, China
aticky863@126.com, bqbs12496989@yahoo.com.cn, c280071529@qq.com, d315136288@qq.com
Keywords: numerical simulation; Computational fluid dynamics; hydraulic jet pump; area ratio; throat length; spray distance
Abstract.
Since numerical simulation method can reduce experimental expenses and design cycle, our approach may provide some references for safe design and engineering practice of hydraulic jet pump.
Therefore, two-dimensional numerical simulation of oil flow in hydraulic jet pump with different structural parameters was simulated in this paper.
The equations of mass and momentum were solved using version 12.0.16 of the general purpose CFD code FLUENT.
The density of oil in the simulation is 960 kg/m3, the dynamic viscosity of which is 0.048 Pa·s.
Since numerical simulation method can reduce experimental expenses and design cycle, our approach may provide some references for safe design and engineering practice of hydraulic jet pump.
Therefore, two-dimensional numerical simulation of oil flow in hydraulic jet pump with different structural parameters was simulated in this paper.
The equations of mass and momentum were solved using version 12.0.16 of the general purpose CFD code FLUENT.
The density of oil in the simulation is 960 kg/m3, the dynamic viscosity of which is 0.048 Pa·s.
Online since: December 2013
Authors: Ramlan Zailani, Wisnoe Wirachman, Ehan Sabah Shukri
In this paper the influence of different twisted ratio on temperature distribution are simulated and analyzed by means of CFD software.
All of the simulation is carried out at the same inlet conditions with Reynolds number around 2.5 × 104 based on the inlet diameter of the diffuser.
The simulation is carried out using Numeca Fine/Open v.2.12-3 applying standard k-ε model.
The simulation results in an annular diffuser configuration C represent the temperature distribution in the annular diffuser using twisted ratio (Y/W = 1.16).
Zailani, “Numerical Simulation of Temperature Distribution in an Annular Diffuser Equipped With Helical Tape”, 2013 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA 2013), in press
All of the simulation is carried out at the same inlet conditions with Reynolds number around 2.5 × 104 based on the inlet diameter of the diffuser.
The simulation is carried out using Numeca Fine/Open v.2.12-3 applying standard k-ε model.
The simulation results in an annular diffuser configuration C represent the temperature distribution in the annular diffuser using twisted ratio (Y/W = 1.16).
Zailani, “Numerical Simulation of Temperature Distribution in an Annular Diffuser Equipped With Helical Tape”, 2013 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA 2013), in press
Online since: January 2014
Authors: Xin Jie Cui, Shi Dong Zhang, Fan Shi, Chuan Lei Yang
Dynamic simulation of a high-performance sequentially turbocharged marine diesel engine.
A CFD Investigation of 2D and 3D Viscous Pulse Propagation in Engine Exhuast Systems.
Two-dimensional Simulation of Wave Propagation in a Three-pipe Junction.
Some Basic Elements to Achieve a Future 1D Simulation of Wave Propagation in I.C.E.
Unsteady Flows Inside the Piping Systems of Interal Combustion Engines: 1D Simulation Modeling and Experimental Validation.
A CFD Investigation of 2D and 3D Viscous Pulse Propagation in Engine Exhuast Systems.
Two-dimensional Simulation of Wave Propagation in a Three-pipe Junction.
Some Basic Elements to Achieve a Future 1D Simulation of Wave Propagation in I.C.E.
Unsteady Flows Inside the Piping Systems of Interal Combustion Engines: 1D Simulation Modeling and Experimental Validation.
Online since: October 2011
Authors: Yan Qun Jiang, Xian Wen, Wei Zhang
The flow database at Re=100 is obtained by CFD software, i.e.
Results and Discussions The database of flow past a stationary circular cylinder at Re=100 was calculated by the CFD software, i.e.
When the basic flow is time-average flow, the imaginary part of the eigenvalue of the most unstable mode, i.e. the saturated frequency of oscillation, is 0.1675, which accords with the frequency obtained from the direct numerical simulation .
While , the largest real part of the eigenvalues are negative which shows the basic flow is stable, which shows good agreement with the result of direct numerical simulation qualitatively.
The extrapolated critical Reynolds number obtained from the above linear stability analysis is about , which is very close to the values obtained by direct numerical simulation and the precious experiment results, i.e.
Results and Discussions The database of flow past a stationary circular cylinder at Re=100 was calculated by the CFD software, i.e.
When the basic flow is time-average flow, the imaginary part of the eigenvalue of the most unstable mode, i.e. the saturated frequency of oscillation, is 0.1675, which accords with the frequency obtained from the direct numerical simulation .
While , the largest real part of the eigenvalues are negative which shows the basic flow is stable, which shows good agreement with the result of direct numerical simulation qualitatively.
The extrapolated critical Reynolds number obtained from the above linear stability analysis is about , which is very close to the values obtained by direct numerical simulation and the precious experiment results, i.e.
Online since: December 2012
Authors: Hong Wei Liu, Juan Zhang, Nai Long Xin
Simulation Analysis of the Heat Temperature Field of Lithium-ion Battery Pack for Pure Electric Vehicle
Hongwei Liu1,a, Juan Zhang1,b,Nailong Xin1,c
1 State Key Laboratory of Automotive Simulation and Control,
Jilin University, Changchun, 130025, China
aasgroup@163.com,bzhangjuan90122@163.com, cxin5348550@163.com
Keywords: Pure electric vehicle, Lithium-ion battery pack, The heat temperature field, Simulation analysis
Abstract.
Firstly, the heat temperature condition of the battery is analyzed , and the distribution of the heat temperature field is determined ; Secondly, the heat model and the heat rate model are set up, and the thermal model of the thermal physical parameters and definite solution conditions are determined; Finally, the heat of battery pack is analyzed by CFD, including using Fluent module in ANSYS software ; Through the simulation analysis of heat temperature field of lithium-ion battery, theoretical guidances of reasonable design to the heat management system are provided.
By the calculation and simulation of Fluent software, the heat temperature field distribution of the lithium-ion power battery pack in 30 ˚C we can be got , with 1C rate current of constant current discharge, as is shown in Fig.6.
The simulation results are shown in Table 3.
Conclusion Through the ANSYS thermal software’s simulation computation to the heat temperature field, the battery pack heat can be got by different charge and discharge current, when environmental temperature is 30˚C.
Firstly, the heat temperature condition of the battery is analyzed , and the distribution of the heat temperature field is determined ; Secondly, the heat model and the heat rate model are set up, and the thermal model of the thermal physical parameters and definite solution conditions are determined; Finally, the heat of battery pack is analyzed by CFD, including using Fluent module in ANSYS software ; Through the simulation analysis of heat temperature field of lithium-ion battery, theoretical guidances of reasonable design to the heat management system are provided.
By the calculation and simulation of Fluent software, the heat temperature field distribution of the lithium-ion power battery pack in 30 ˚C we can be got , with 1C rate current of constant current discharge, as is shown in Fig.6.
The simulation results are shown in Table 3.
Conclusion Through the ANSYS thermal software’s simulation computation to the heat temperature field, the battery pack heat can be got by different charge and discharge current, when environmental temperature is 30˚C.
Online since: October 2011
Authors: Xue Liang Zhu, Guo Qiang Cheng
Numerical Study on Propagation Lows of Gas Explosion in Roadway
Cheng Guoqiang 1, a, Zhu Xueliang 2,b
1 Shandong University of Science and Technology, Qingdao,Shandong, 266510,China
2 Shandong University of Science and Technology, Qingdao,Shandong, 266510,China
agqcheng12@gmail.com, bxlzhu86@163.com
Keywords: gas explosion, numerical simulation, flame speed, roadway length
Abstract.
Based on Fluid Dynamics and Combustion Theory, the model of pipeline was created by the software of CFD, and the spread of gas explosion was simulated in the conditions of pipelines of different lengths.
Conclusions The propagation and deformation of flame front during roadway gas explosion were simulated by CFD software.
Based on Fluid Dynamics and Combustion Theory, the model of pipeline was created by the software of CFD, and the spread of gas explosion was simulated in the conditions of pipelines of different lengths.
Conclusions The propagation and deformation of flame front during roadway gas explosion were simulated by CFD software.
Online since: February 2014
Authors: Jing Cui, Si Yue Ma, Li Xue Shi, Yu Peng Liang, Yong Hui Guo, Xue Bin Zhao
Numerical Simulation for Perforation-caused Leakage Diffusion of Buried Gas Pipeline
Jing Cui*, Siyue Ma, Yupeng Liang, Yonghui Guo, Xuebin Zhao, Lixue Shi
School of Airport, Civil Aviation University of China, Tianjin, 300300, China
Keywords: Underground Gas Pipeline; Perforation-caused Leakage; Diffusion Concentration; FLUENT Software; Numerical Simulation
Abstract.
CFD software FLUENT is adopted to perform a transient simulation of this problem, by which the changing trend of the diffusion concentration and velocity of methane with time is obtained and the influence from perforation diameter is further investigated.
We suggest a three-dimensional numerical simulation on buried gas pipeline leakage to make the simulation results much closer to the truth.
Gas leakage diffusion in limited space and the numerical simulation of the explosion[D](2011)
The numerical simulation of high-pressure natural gas pipeline leakage diffusion process[J].
CFD software FLUENT is adopted to perform a transient simulation of this problem, by which the changing trend of the diffusion concentration and velocity of methane with time is obtained and the influence from perforation diameter is further investigated.
We suggest a three-dimensional numerical simulation on buried gas pipeline leakage to make the simulation results much closer to the truth.
Gas leakage diffusion in limited space and the numerical simulation of the explosion[D](2011)
The numerical simulation of high-pressure natural gas pipeline leakage diffusion process[J].