Flow Field Analysis and Structure Optimization of Water Hydraulic Poppet Valve Based on the CFD

2013 ◽  
Vol 791-793 ◽  
pp. 734-737 ◽  
Author(s):  
Qiu Xia ◽  
Xiang Pan Guang
Keyword(s):  
Flow Field ◽  
Simulation Analysis ◽  
Internal Flow ◽  
Turbulent Energy ◽  
Field Analysis ◽  
Value Differences ◽  
Poppet Valve ◽  
Traditional Structure ◽  
Fluent Software ◽  
Water Hydraulic

This paper builds two water hydraulic poppet valve models which are of different structure, and simulation analysis used by FLUENT software on it’s internal flow field. The analysis results show that, after improving the structure of water hydraulic poppet valve, import and export pressure value differences decreased, effectively restrains the generation of cavitation, reduces the vibration amplitude and turn down noise, reduces loss of turbulent energy, the overall performance is superior to the traditional structure.

Experiment and Optimization of Settling Effect of Drip Streaming Filter

2014 ◽  
Vol 620 ◽  
pp. 246-253
Author(s):  
Su Zhen Wu ◽  
Han Song Yang
Keyword(s):  
Flow Field ◽  
Flow Rate ◽  
Simulation Analysis ◽  
Structural Parameters ◽  
Internal Flow ◽  
Tube Insertion ◽  
Insertion Depth ◽  
Sediment Production ◽  
Fluent Software ◽  
The Relationship

In this thesis, by changing the filter overflow tube insertion depth of spin streaming filter, combined with the existing drip irrigation equipment change the structure parameters of spin streaming filter. Using Fluent software to choose reasonable turbulence model for numerical simulation analysis, contrastive research on the field test was carried on, reveals the relationship between the internal flow field pressure and the flow rate. The sediment production increased before they are reduced with the increase of the overflow tube insertion depth. It should choose the optimal insertion depth according to the specific use and usage model of hydrocyclone in actually use. The variation trend of internal flow field pressure and the flow rate when selected structural parameters changed are also analyzed. With the increase of insertion depth, the axial velocity and radial velocity of sand and water inside the hydrocyclone shows the tendency of decrease. Furthermore, the field experiment verifies the simulation result, thus proving the feasibility of using Fluent computational fluid dynamics software to simulate the internal flow field of the spin streaming filter. The research results will provide referential basis for the design and application of the drip filter system.

scholarly journals Simulation and experimental research based on carrier gas flow rate on the influence of four-channel coaxial nozzle flow field

2020 ◽  
pp. 002029402096423
Author(s):  
Shi Rui Guo ◽  
Qian Qian Yin ◽  
Lu Jun Cui ◽  
Xiao Lei Li ◽  
Ying Hao Cui ◽  
...  
Keyword(s):  
Flow Field ◽  
Gas Flow ◽  
Simulation Analysis ◽  
Two Phase ◽  
Carrier Gas ◽  
Coaxial Nozzle ◽  
Convergence Point ◽  
Flow Convergence ◽  
Fluent Software ◽  
Carrier Gas Flow

This paper investigates the influence of carrier gas flow on the external flow field of coaxial powder feeding nozzle. FLUENT software was adopted to establish gas-solid two-phase flow. The simulation of powder stream field under different carrier gas flow was also carried out. Results show that the larger the flow of carrier gas is, the higher the gas flow field velocity at the nozzle outlet is. At the same time, the concentration at the convergence point is lower, and the convergent point is maintained at 0.015 m. Under the condition of 4 L/min, the powder flow convergence is good. When it exceeds 4 L/min, powder spot diameter increases. The experiment of powder aggregation and laser cladding forming were completed, which shows that the forming effect is the best one under the condition of 4 L/min. It is consistent with the simulation analysis results and has a high reference to the optimization of the process parameters of coaxial nozzle.

Simulation Analysis of Temperature Field of Permanent Magnet Governor

2014 ◽  
Vol 1044-1045 ◽  
pp. 422-425 ◽  
Author(s):  
Yan Jie Wang ◽  
San Ping Zhou
Keyword(s):  
Fluid Dynamics ◽  
Temperature Field ◽  
Flow Field ◽  
Permanent Magnet ◽  
Simulation Analysis ◽  
Eddy Current Loss ◽  
Ansys Fluent ◽  
Operation Process ◽  
Fluent Software ◽  
Computational Fluid Dynamics Cfd

In the operation process of permanent magnet governor, the temperature rises due to eddy current loss, and demagnetization of permanent magnet occurs at high temperature. The numerical simulation of fluid flow field and temperature field was carried out with the method of computational fluid dynamics (CFD) and ANSYS-Fluent software. And then we improved the structure of permanent magnet governor on the basis of analysis of the flow field and temperature distribution. The result indicates that the flow of improved structure increases, and temperature drops 46.°C, fulfilling the desired temperature range of permanent magnet can bear, which provides a theory basis for the design of ventilation-cooling structure of permanent magnet governor.

scholarly journals The Flow Field Analysis and Flow Calculation of Ultrasonic Flowmeter Based on the Fluent Software

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Ling Guo ◽  
Yue Sun ◽  
Ling Liu ◽  
Zhixi Shen ◽  
Ruizhen Gao ◽  
...  
Keyword(s):  
Flow Field ◽  
Three Dimensional ◽  
Simulation Method ◽  
Ultrasonic Flowmeter ◽  
Field Analysis ◽  
Dimensional Structure ◽  
Power Correction ◽  
Ideal Condition ◽  
Proposed Model ◽  
Fluent Software

We can build the three-dimensional structure model based on the Gambit software and achieve the distribution of flow field in the pipe and reflux flow condition at the position of transducer in regard to the real position of transducer according to the Fluent software. Under the framework, define the reflux length based on the distance of reflux along the channel and evaluate the effect of reflux on flow field. Then we can correct the power factor with the transmission speed difference method in the ideal condition and obtain the matching expression of power correction factor according to the practice model. In the end, analyze the simulation experience and produce the sample table based on the proposed model. The comparative analysis of test results and simulation results demonstrates the validity and feasibility of the proposed simulation method. The research in this paper will lay a foundation for further study on the optimization of ultrasonic flowmeter, enhance the measurement precision, and extend the application of engineering.

Internal Flow Field Analysis of Air-Suction Roller-Type Precision Metering Device

2014 ◽  
Vol 620 ◽  
pp. 84-88
Author(s):  
Chuang Ren ◽  
Qing Hui Lai ◽  
Zhao Guo Zhang ◽  
Xiao Jun Gao ◽  
Zeng Yao Wang ◽  
...  
Keyword(s):  
Flow Field ◽  
Flow Velocity ◽  
Internal Flow ◽  
Field Analysis ◽  
Structure Parameter ◽  
Wall Function ◽  
Real Gas ◽  
Area Increase ◽  
Center Axis ◽  
Flow Field Analysis

In order to analyze the influence of structure parameter of air-suction roller-type precision metering device on the flow velocity and pressure, the flow field was calculation and simulation. Take the compressibility and the viscosity of the real gas into account, the N-S equations, RNG k-ε turbulence model and wall function were applied to measure the flow rate and pressure of the outlet under the conditions of changing the area of the suction holes and the diameter of shaft. The results revealed that compared with the shaft holes area, the diameter of center axis have a marked influence on the flow velocity and pressure of outlet. When the area of suction holes is constant, with the increase of shaft diameter, the outlet velocity increased and pressure decreased; when the diameter of axle is constant, with the shaft holes area increase, the outlet velocity increased and pressure decreased.

Flow Field Numerical Simulation Analysis of Five Wing Horizontal Wave Turbine Power Plant with Different Blade Angles

2013 ◽  
Vol 477-478 ◽  
pp. 221-225
Author(s):  
Shi Ming Wang ◽  
Ka Tian
Keyword(s):  
Flow Field ◽  
Simulation Analysis ◽  
Turbine Blades ◽  
Maximum Velocity ◽  
Flow Distribution ◽  
High Flow ◽  
Rotational Period ◽  
Blade Angle ◽  
Horizontal Wave ◽  
Fluent Software

Used FLUENT software to simulate the flow distribution of a certain horizontal turbine with its blade angle changed from 25 ° to-35 °.The simulation results show the flow field changes with a period which was a fifth to the turbine rotational period. When the blade heads deflected laterally, the high flow velocity appeared near rear back turbine blades, or it appeared near the facing flow blades which were in the front lower part of the turbine. Besides, for blade angle deflected inside models, a stable annular velocity vector vortex gradually emerged around turbine as blade angle increased. The maximum velocity of flow field increased firstly and then stayed stable as blade angle changed. The flow distribution results fully confirmed that the reasonable optimization to the blade angle of the turbine can help the turbine achieve a more effective rotation and improve the flow distribution.

The Simulation and Analysis on Leakage Flow Rate of Plunger Pair of Plunger Water Hydraulic Motor

2015 ◽  
Vol 779 ◽  
pp. 62-67
Author(s):  
Ze Yin Shan ◽  
Rui Bo Yuan ◽  
Chao Li
Keyword(s):  
Theoretical Calculation ◽  
Flow Rate ◽  
Simulation Analysis ◽  
Leakage Flow ◽  
Hydraulic Motor ◽  
Plunger Pair ◽  
Leakage Flow Rate ◽  
Fluent Software ◽  
Water Hydraulic ◽  
Simulation Results

Plunger pair of plunger water hydraulic motor has the problem of leakage. Simulation of the leakage of plunger pair of plunger water hydraulic motor is carried out. Through calculation and analysis establish the model of plunger pair of plunger water hydraulic motor. The simulation analysis of leakage of plunger pair was carried out with Fluent software. Theoretical calculation and simulation results of plunger pair are obtained. The results provide basis and method to reduce the leakage of plunger water hydraulic motor and design for the motor plunger.

Research on Numerical Investigation and Test Verification of Brake Performance in a Hydrodynamic Tractor-Retarder Assembly

2010 ◽  
Vol 97-101 ◽  
pp. 3357-3361
Author(s):  
Wei Wei ◽  
Qing Dong Yan ◽  
Jing Yan Wu
Keyword(s):  
Experimental Data ◽  
Flow Field ◽  
Internal Flow ◽  
Torque Converter ◽  
Field Analysis ◽  
Rotating Speed ◽  
Spiral Vortex ◽  
Work Mechanism ◽  
Flow Field Analysis ◽  
Brake Performance

The brake performance of a hydrodynamic tractor-retarder assembly, which is the combination of torque converter and hyaulic retarder, was studied to explore its work mechanism. Spiral vortex distribution pattern of internal flow field in the assembly was discovered on the basis of reasonable boundary condition, where runaway speed of stator was determined by CFD analysis. Comparison of experimental data and flow field analysis shows that accurate brake performance of hydrodynamic tractor-retarder assembly can be calculated only by 3D flow field analysis presently and numerical simulation results is close to experimental data, and approximate linear relationship exists between runaway speed of stator and rotating speed of pump.

Flow Field Optimization and Strategy of Construction Cell Microspheres

2012 ◽  
Vol 482-484 ◽  
pp. 2261-2264
Author(s):  
Hong Li
Keyword(s):  
Flow Field ◽  
Process Parameters ◽  
Field Analysis ◽  
Optimal Process ◽  
Fluent Software ◽  
Flow Field Analysis ◽  
Determine System

Objective: To optimize process parameters and determine system of culture and collection cells microspheres by Fluent software. Method: Hypothesises of boundaries were brought forward of preparation cell microspheres. Parameters, the mesh and relevant conditions of cells microspheres were determined.Result: Parameters of the optimal process were determined by the flow field analysis of cell microspheres. Moreover the strategy of culture and collection cell microspheres were completed.Conclusion: The results may be caused research a equipment of proliferation cell micropheres. This is probably a consequence of reduction bankroll of development equipment of culture and collection cell micropheres.

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