Numerical Simulation of the Flow Field to the Double Eccentric Butterfly Valve and Performance Prediction

2009 ◽  
Author(s):  
Wei-Min Feng ◽  
Guang-Yu Xiao ◽  
Li Song
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Performance Prediction ◽  
Butterfly Valve ◽  
And Performance

Numerical Simulation and Performance Prediction of Multistage Canned Motor Pump

2016 ◽  
Author(s):  
Bin Xia ◽  
Fan-Yu Kong ◽  
Yuxing Bai ◽  
Xiaohui Duan
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Performance Prediction ◽  
Three Dimensional ◽  
Internal Flow ◽  
Main Flow ◽  
Three Dimensional Model ◽  
Local Flow ◽  
And Performance ◽  
Canned Motor

Due to the advantages of high head and no leakage, multistage canned motor pump is widely used in oil industry, chemical industry, national defense and atomic energy. In order to meet the needs of the market, the multistage canned motor pump is designed. This paper introduced the hydraulic design and structural design. In order to optimizing the performance of the pump, this paper designed and used multistage canned motor pump DBP15–50×8 as the research object. Three-dimensional model of the main flow passage components is built and the mesh is generated respectively by using Pro/E and ICEM software, and we calculated the whole internal flow field of the pump that was selected by using ANSYS CFX14.0 software, achieving the pressure and velocity distribution in the pump and the internal details of flow in impeller and other main flow components. The post-processing showed the fluid in sliding bearing section rotates around the shaft, so the local flow is disorder. The comparison of the performance prediction and the experiment shows that the error is low. The cavitating turbulent flow in the flow field was numerically simulated by using the cavitation model. The cavitation phenomena didn’t occur in the experiments. The condition meets the result of numerical simulation.

Integration of Distributing Energy System I: Modeling and Simulation

2012 ◽  
Vol 512-515 ◽  
pp. 1156-1162
Author(s):  
Jin Yang Wang ◽  
Guo Min Cui ◽  
Fu Yu Peng
Keyword(s):  
Numerical Simulation ◽  
Gas Turbine ◽  
Performance Prediction ◽  
System Modeling ◽  
Energy System ◽  
Primary Energy ◽  
Simulation System ◽  
Generation System ◽  
Micro Gas Turbine ◽  
And Performance

The heating, power and cooling distributing energy system is studied by numerical simulation. System modeling and performance prediction are studied on the tri-generation system based on micro gas turbine as primary energy utilizing equipment in part Ⅰ. The results show: The numerical simulation can replace pilotscale experiment of objective project in the aspects of design and performance prediction of distributing energy system.

scholarly journals Numerical Investigation of Fluid Flow and Performance Prediction in a Fluid Coupling Using Large Eddy Simulation

2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
Wei Cai ◽  
Yuan Li ◽  
Xingzhong Li ◽  
Chunbao Liu
Keyword(s):  
Experimental Data ◽  
Flow Field ◽  
Large Eddy Simulation ◽  
Performance Prediction ◽  
Subgrid Scale ◽  
Eddy Simulation ◽  
Comparison Results ◽  
Large Eddy ◽  
Hydraulic Coupling ◽  
And Performance

Large eddy simulation (LES) with various subgrid-scale (SGS) models was introduced to numerically calculate the transient flow of the hydraulic coupling. By using LES, the study aimed to advance description ability of internal flow and performance prediction. The CFD results were verified by experimental data. For the purpose of the description of the flow field, six subgrid-scale models for LES were employed to depict the flow field; the distribution structure of flow field was legible. Moreover, the flow mechanism was analyzed using 3D vortex structures, and those showed that DSL and KET captured abundant vortex structures and provided a relatively moderate eddy viscosity in the chamber. The predicted values of the braking torque for hydraulic coupling were compared with experimental data. The comparison results were compared with several simulation models, such as SAS and RKE, and SSTKW models. Those comparison results showed that the SGS models, especially DSL and KET, were applicable to obtain the more accurate predicted results than SAS and RKE, and SSTKW models. Clearly, the predicted results of LES with DSL and KET were far more accurate than the previous studies. The performance prediction was significantly improved.

A Numerical Simulation of Parachute Opening Process Based on ALE Method

2013 ◽  
Vol 390 ◽  
pp. 33-37
Author(s):  
Y. Zhang ◽  
H. Cheng ◽  
L. Yu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Structure Change ◽  
Field Change ◽  
Finite Mass ◽  
Ale Method ◽  
And Performance ◽  
Opening Process

In this paper, the parachute opening process of finite mass situation was simulated based on ALE method. The results of structure change, the flow field change and some important aerodynamic data were obtained. Compared with the experiment, it can be found that the opening process was same with the actual opening. This method was useful in parachute designing and performance analyzing.

scholarly journals Quasi-unsteady Flow Field Computation and Performance Prediction of Contra-Rotating Fan

2020 ◽  
Vol 328 ◽  
pp. 04005
Author(s):  
Bystrík Červenka ◽  
Michal Holubčík ◽  
Milan Malcho
Keyword(s):  
Flow Field ◽  
Performance Prediction ◽  
Static Pressure ◽  
Potential Effect ◽  
Aerodynamic Noise ◽  
High Power Density ◽  
Centrifugal Fan ◽  
Harmonic Model ◽  
Noise Assessment ◽  
And Performance

Discussion of numerical flow field prediction with two rotor-stator interface models is presented in the paper. The mixing plane and harmonic models are applied to contra rotating fan. Both models confirmed good performance and high power density leading to compact configuration of the contra rotating fan compared to centrifugal fan. The harmonic model provides realistic wake and potential effect propagation through the rotor-rotor interface. In addition, it provides user with static pressure frequency and amplitude inputs for aerodynamic noise assessment.

Three-dimensional flow field numerical simulation and performance analysis for a new type canned motor pump

2013 ◽  
Vol 227 (12) ◽  
pp. 2825-2833 ◽  
Author(s):  
Cui Jianzhong ◽  
Xie Fangwei ◽  
Liu Qingyun ◽  
Wang Cuntang ◽  
Zhang Xianjun ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Three Dimensional ◽  
Internal Flow ◽  
Outer Diameter ◽  
Small Flow ◽  
New Type ◽  
Fluent Software ◽  
And Performance ◽  
Canned Motor

A new type of canned motor pump with extensive application value is designed, researched, and developed in this article. In order to grasp the characteristic of the internal flow field of the pump, the internal flow field is simulated numerically by using FLUENT software with the standard k–ɛ turbulence model, SIMPLEC algorithm, and multiple reference frame model. The distribution of the pressure and velocity of the flow in the canned motor pump is analyzed in different working conditions. Moreover, the head and efficiency of the pump is predicted based on the simulation results, which show that the head and efficiency of the canned motor pump in small flow rate will be better. The performance of the canned motor pump can be improved by appropriately increasing the outer diameter of the impeller and the base diameter of the volute. The results of the numerical simulation are in accord with theoretical analysis, which verifies the correctness of the numerical simulation. The investigations have important theoretical guiding significance for the design of the canned motor pump.

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