Numerical Simulation of the Flow Field in Safety Valve

2012 ◽  
Vol 472-475 ◽  
pp. 1432-1436
Author(s):  
Xiao Bin Ji ◽  
Xue Yi Qi ◽  
Xiao Yan Li ◽  
Wan Bin Jin
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Reynolds Number ◽  
Flow Field ◽  
Field Distribution ◽  
Safety Valve ◽  
Structural Parameters ◽  
Flow Noise ◽  
Simulating Calculation

By using the Reynolds stress turbulence model at big Reynolds number condition and computational fluid dynamics, the data simulating calculation was carried out to the safety valve inner flow field with different opening size and different valve structural parameters. The result were showed in visual graphics , and the study showed that the valve structural parameters impact on the flow field distribution , the cavitation creation and the flow noise greatly.

Research Progress of Simulation on the Flow Field in Anaerobic Reactor

2014 ◽  
Vol 955-959 ◽  
pp. 2098-2101
Author(s):  
Qin Zhang ◽  
Qiang Li ◽  
Jia Tang
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Wastewater Treatment ◽  
Flow Field ◽  
Treatment Effect ◽  
Dynamics Simulation ◽  
Research Progress ◽  
Computational Fluid Dynamics Simulation ◽  
Anaerobic Reactor

The flow field in anaerobic reactor is very complex, but it has been given wide attention because of its important impact to wastewater treatment effect. It is often studied by numerical simulation. The paper explored the research progress of simulation on the flow field in anaerobic reactor by the summary of development of anaerobic reactor and principle and characteristics of computational fluid dynamics simulation and introduction of study and application status on numerical simulation. And then it gave its opinion on the development of simulation on the flow field in anaerobic reactor in future.

Optimal Design of a New Type of Savonius Rotor Using Simulation Analysis

2012 ◽  
Vol 499 ◽  
pp. 120-125 ◽  
Author(s):  
Zhi Peng Tang ◽  
Ying Xue Yao ◽  
Liang Zhou ◽  
Q. Yao
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Optimal Design ◽  
Simulation Analysis ◽  
Structural Parameters ◽  
Sliding Mesh ◽  
Savonius Rotor ◽  
Mesh Method ◽  
New Type

In order to enhance the efficiency of the Savonius rotor, this paper designs a new type of Savonius rotor with a rectifier. By using Computational Fluid Dynamics software to simulate and optimize the various parameters which affect the efficiency of the rotor. The sliding mesh method is applied here. The Cp-λ curves of wind turbine with different structural parameters are obtained after numerical simulation of flow field. On this basis, this paper gets the optimal structural parameters. And the results indicated that this new type of Savonius rotor has great improvement of efficiency compared with the traditional Savonius-type rotor.

scholarly journals Numerical investigations on effect of wear-ring clearance on performance of a submersible well pump

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401770415 ◽  
Author(s):  
Weidong Shi ◽  
Xiongfa Gao ◽  
Qihua Zhang ◽  
Desheng Zhang ◽  
Daoxing Ye
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Reverse Flow ◽  
Internal Flow ◽  
Experimental Results ◽  
Ring Size ◽  
Numerical Investigations ◽  
Calculation Results

A typical submersible well pump was investigated in this article. The whole flow field of submersible well pump was numerically simulated by computational fluid dynamics software. The influence of clearance of wear-rings on the external characteristic and internal flow field was analyzed through comparing the calculation results with experimental results. The result of the numerical simulation shows that changing clearance of front wear-ring has a greater impact on pump performances than changing clearance of back wear-ring, and the head and efficiency of pump decrease with the increase in the size of clearance. Especially when the size of clearance is larger than 0.5 mm, decreasing becomes more obvious. When the front and back wear-ring size of the clearance comes to 1.0 mm, the efficiency decreases from the highest point of 75.31% to 65.44% at rated flow, and the head of pump decreases about 3.5 m. When the size of clearance is 0.2 mm, reverse-flow will appear in the front shroud cavity of the impeller, and leakage from back wear-ring through the balance hole into the impeller, which has a little influence on the flow field of the impeller inlet.

Numerical Simulation of the Inner Flow Field and the Optimal Design of Hema-Type ATY Nozzle Based on Fluent

2013 ◽  
Vol 634-638 ◽  
pp. 3774-3777
Author(s):  
Min Hua Zhang ◽  
Hong Mei Zheng ◽  
Cui Liu ◽  
Yin Hu Qu ◽  
Tao Liang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Optimal Design ◽  
Flow Field ◽  
Flow Fields ◽  
Fluent Software ◽  
Simulation Results

the inner flow fields of twelve Hema-type ATY nozzles which have different structure and parameters are simulated by the Fluent software, which is based on the CFD (Computational Fluid Dynamics) theory.Then the simulation results are analyzed，through wich the best designed nozzle is determined.

A Numerical Study of Flow Field in a Hydrocyclone for Potash Ore Desliming

2013 ◽  
Vol 448-453 ◽  
pp. 3847-3850
Author(s):  
Da Li ◽  
Fang Qin Cheng ◽  
Jian Feng Li ◽  
Yun Shan Guan
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Numerical Study ◽  
Numerical Approach ◽  
Basic Information ◽  
Feed Composition ◽  
Accurate Design ◽  
Computational Fluid Dynamics Cfd

Despite the widespread use of hydrocyclone in the process of potash ore desliming, its accurate design is often difficult because the feed composition is complicated and the viscosity is high in the brine system. In this study, a numerical approach based on computational fluid dynamics (CFD) was performed to describe the flow field. The numerical simulation of flow pattern in hydrocyclones for potash ore desliming was presented. Some basic information concerning the velocity and pressure distribution is given, and the results can be used as the fundamental basis for its design.

Computational Fluid Dynamics Simulation about Comparison of Different Forms of Return Air in a Small Cold Store

2012 ◽  
Vol 516-517 ◽  
pp. 1133-1138 ◽  
Author(s):  
Yi Tang ◽  
Jing Xie ◽  
Jin Feng Wang ◽  
Chen Miao ◽  
Yi Zheng
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Finite Volume Methods ◽  
Dynamics Simulation ◽  
Wall Function ◽  
Computational Fluid Dynamics Simulation ◽  
Cold Store ◽  
Simulation Results

The quantity of the cold store in our country has been rapidly rising since the 1990s, however, the flow field in the cold store is difficult to obtain accurately by experiments. With reference to the experiences in previous numerical simulations in this paper, CFD is used for analyzing two forms of return air in the cold store with the Finite Volume Methods and the SIMPLE Revised. As a result, Combining with the non-equilibrium wall function, it is found that taking the way of return air on both sides of the fan is more reasonable and the cooling consumption of the empty cold store can be saved before the products enter the cold store. Furthermore, the numerical simulation results can provide reference for choosing fans in the small cold store.

Research on Cylindrical Launcher with Cylindrical Launch Parameters Simulation

2014 ◽  
Vol 886 ◽  
pp. 422-425 ◽  
Author(s):  
Zhu Lin Wang ◽  
Fan Sheng Kong ◽  
Hai Ping Li
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Emission Rate ◽  
Thermal Emission ◽  
Emission Process ◽  
Related Research ◽  
Surface Pressure Distribution ◽  
Unsteady Numerical Simulation

Cylindrical launcher is widely used on the battlefield. Characteristic is easy handling, facilitate multigang outfit, cluster launch, emission rate and better generalization and standardization, etc. This paper mainly studies the thermal emission process of a cylindrical launch, the unsteady numerical simulation of the process, using computational fluid dynamics software GAMBIT and FLUENT, and the concept of dynamic grid and updating method of a certain type of cylindrical equipment vertical thermal emission process. Through to the launcher unsteady numerical simulation of the flow field of the guide surface pressure distribution contours, which lay a foundation for the study of the structure of this type of equipment. At the same time it is for the equipment launcher applicability related research to provide the reference.

Research on Performance Simulation of Recoil Mechanism Based on Computational Fluid Dynamics

2013 ◽  
Vol 299 ◽  
pp. 52-55
Author(s):  
Ye Zun Sun ◽  
Jun Qi Qin ◽  
Chang Chun Di ◽  
Kai Bo Cui ◽  
Yu Liang Yang
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
High Efficiency ◽  
Low Cost ◽  
Internal Flow ◽  
Accurate Calculation ◽  
Performance Simulation ◽  
Development Outlook

It takes much less than the model test and can give a detailed description of the internal details of the internal flow field of recoil mechanism that use computational fluid dynamics theory and numerical simulation do research. It has the advantages of low cost, accurate calculation, high efficiency, easy to implement and so on. This article provides a brief introduction to the current situation and development outlook of the simulation study of the recoil mechanism using of computational fluid dynamics.

Numerical Simulation of Flow Field of Air-Jet in Quenching Process

2014 ◽  
Vol 513-517 ◽  
pp. 2804-2807
Author(s):  
Xin Can Li
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Air Cooling ◽  
Cooling Process ◽  
Outer Flow ◽  
Air Jet ◽  
The World ◽  
Quenching Process

The type of atomize-cool and air-cool are widely used in the world now. Air-jet is a very vital instrument in quenching by air-cooling. t is necessary to simulate the inner and outer flow-field of air-jet. By means of computational fluid dynamics soft system Fluent, numerical simulation of quenching air cooling process of air-jet was carried out. The work can support the actual production.

Research on Numerical Simulation of Flow-Field around the Building Based on FLUENT

2011 ◽  
Vol 94-96 ◽  
pp. 2123-2129
Author(s):  
Ying Huang ◽  
Pan Guo
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Domain Boundary ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
Computational Domain ◽  
Selection Principle ◽  
Fluent Software

In the paper the gymnasium was used to discuss the selection principle of computational domain, boundary conditions, meshing, turbulence model, the location of referred pressure, solved parameters, and the criterion of convergence during numerical simulation of flow-field around the building based on FLUENT software. Compared the results of numerical simulation and wind tunnel test, it is feasible to calculate the wind-pressure on the building surface based on the theory of computational fluid dynamics.

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