Prediction of the relationship between flow of tubular pump and differential pressure within inlet passage with CFD method

2012 ◽  
Vol 15 (6) ◽  
pp. 062018
Author(s):  
Y H Yu ◽  
B Cheng
Keyword(s):  
Differential Pressure ◽  
Cfd Method ◽  
The Relationship

Study on Flow Measurement of Large-Scale Low-Lift Pumping Stations with CFD Method

2012 ◽  
Vol 212-213 ◽  
pp. 1233-1236
Author(s):  
Bin Cheng ◽  
Yong Hai Yu
Keyword(s):  
Numerical Simulation ◽  
Flow Measurement ◽  
Large Scale ◽  
Measuring Method ◽  
Differential Pressure ◽  
Test Method ◽  
Pumping Stations ◽  
Simplec Algorithm ◽  
Cfd Method ◽  
The Relationship

The measuring method of flow of large-scale low-lift pump, in which the differential pressure of two measuring points in inlet passage instead of the mean differential pressure of two specified section of inlet passage to calibrate the relationship between flow and differential pressure, is developed. The numerical simulation on differential pressure of two measuring points in inlet passage, which is took out earlier than the pump set test method, is carried out with the standard k- turbulence model and SIMPLEC algorithm. The comparison of the relationships fitted respectively with numerical simulation approach and pump set test shows that the calibration accuracy of two different ways is nearly same. The conclusion can be drawn that the calibration of the relationship between flow and differential pressure with CFD is feasible. The CFD-based flow measurement method, as a more simple and convenient way, can be applied in large-scale low-lift pumps.

CFD Study on the Flow Characteristics in Filleted Microchannels

2011 ◽  
Vol 103 ◽  
pp. 268-273
Author(s):  
Hong Jie Yan ◽  
Ping Zhou ◽  
Ze Lin Xu ◽  
Zhuo Chen ◽  
Jing Wen Mo
Keyword(s):  
Pressure Drop ◽  
Aspect Ratio ◽  
Flow Model ◽  
Constant Width ◽  
Flow Characteristics ◽  
Flow Pressure ◽  
Cfd Method ◽  
Poiseuille Number ◽  
The Relationship ◽  
Laminar Flow Model

The flow characteristics of water in filleted microchannels were simulated based on CFD method. The flow pressure drop at different aspect ratioandRenumber were rearranged on the simulating results with laminar flow model. The results indicated that the pressure drop enlarges with the increase of in the case of the constant width of the microchannel. Within the range ofRenumber of interest, Poiseuille number of the flow is constant for differentRe, but decreases with increasing aspect ratio. An equation was fitted to describe the relationship betweenPonumber and aspect ratio, i.e. .

Wet Gas Over-Reading Characteristic Research of Inside and Outside Tube Differential Pressure Flowmeter

2012 ◽  
Vol 241-244 ◽  
pp. 168-171
Author(s):  
Li De Fang ◽  
Xiao Jie Wang ◽  
Xiao Ting Li ◽  
Li Li Pang ◽  
Yu Jiao Liang
Keyword(s):  
Differential Pressure ◽  
Theoretical Formula ◽  
Online Measurement ◽  
Characteristic Parameters ◽  
Experimental Platform ◽  
Internal Reasons ◽  
Wet Gas ◽  
New Type ◽  
The Relationship

This paper designs a new type of the inside and outside tube differential pressure flowmeter based on the traditional flowmeters. Its structure is introduced and its theoretical formula is induced. For the online measurement of wet gas, this paper has done a lot of simulate experiments on the standard experimental platform. Applying origin drawing tools, it has drawn the relationship curves between influence parameters and over-reading specific value. And then, it analyzed the influence of different characteristic parameters. Finally，proceeding from the basis of over-reading theories，it has explained the internal reasons for these phenomenon.

Research on Pressure Drop Transfer Standard Based on CFD

2012 ◽  
Vol 542-543 ◽  
pp. 1105-1108
Author(s):  
Zhi Cai Jiang ◽  
Xue Ding ◽  
Hang Zhao ◽  
Zhong Di Su
Keyword(s):  
Mathematical Model ◽  
Pressure Drop ◽  
Laminar Flow ◽  
Air Flow ◽  
Differential Pressure ◽  
Capillary Tubes ◽  
Measuring Systems ◽  
Transfer Standard ◽  
Flow Part ◽  
Cfd Method

The pressure drop transfer standard is a major measurement element in the pressure drop measurement device as a traceability element. This paper analyzed the air flow in the capillary tubes, and mathematical model of pressure drop transfer standard was got by the differential pressure at inlet non-laminar flow part and differential pressure in the laminar flow part. A CFD method adopting laminar model is used to confirm the theory. The pressure drop value was calculated by the diameters and length of all capillary tubes measured by OGP video measuring systems, and the result shows the calculated value was verified by the calibration value.

scholarly journals Nonuniform Oxidation on the Surface of Fuel Element in HTR

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Peng Liu ◽  
Yanhua Zheng ◽  
Wei Xu ◽  
Lei Shi
Keyword(s):  
Fuel Element ◽  
Computer Technology ◽  
Shape Function ◽  
Accident Analysis ◽  
Packed Beds ◽  
Sphere Surface ◽  
Graphite Oxidation ◽  
Air Ingress ◽  
Cfd Method ◽  
The Relationship

The graphite oxidation of fuel element has obtained high attention in air ingress accident analysis of high temperature gas-cooled reactor (HTR). The shape function, defined as the relationship between the maximum and the average of the oxidation, is an important factor to estimate the consequence of the accident. There are no detailed studies on the shape function currently except two experiments several decades ago. With the development of computer technology, CFD method is used in the numerical experiment about graphite oxidation in pebble bed of HTR in this paper. Structured packed beds are used in the calculation instead of random packed beds. The result shows the nonuniform distribution of oxidation on the sphere surface and the shape function in the condition of air ingress accident. Furthermore, the sensitive factors of shape function, such as temperature and Re number, are discussed in detail and the relationship between the shape function and sensitive factors is explained. According to the results in this paper, the shape function ranges from 1.05 to 4.7 under the condition of temperature varying from 600°C to 1200°C and Re varying from 16 to 1600.

Development of Concept Vehicle Model by CFD Method

2013 ◽  
Vol 631-632 ◽  
pp. 831-836
Author(s):  
Hui Zhu ◽  
Zhi Gang Yang
Keyword(s):  
Aerodynamic Drag ◽  
Flow Characteristics ◽  
Aerodynamic Characteristics ◽  
Vehicle Model ◽  
3 Dimensional ◽  
Concept Vehicle ◽  
Ev Model ◽  
High Reynolds ◽  
Cfd Method ◽  
The Relationship

In this study, 3-dimensional flow characteristics around three concept EV models were computed for steady, incompressible, and viscous flow, adopting a realizable k-εturbulence model. In order to research the relationship between different structure of models and aerodynamic drag, comparative study were carried out for the aerodynamic characteristics of three concept EV models at a high Reynolds number, Re≈8.2×106(base on the vehicle length). As a result of this study, the new concept EV model with low aerodynamic drag was completed by integrating the advantages of three reference models.

Optimization of a 17m Catamaran Based on the Resistance Performance

2013 ◽  
Vol 690-693 ◽  
pp. 3414-3418 ◽  
Author(s):  
Da Zheng Wang ◽  
Fei Ma ◽  
Lei Mei
Keyword(s):  
Wave Theory ◽  
Computational Method ◽  
Hydrodynamic Characteristics ◽  
Design And Optimization ◽  
Computational Fluid Dynamics Cfd ◽  
Design Speed ◽  
Cfd Method ◽  
Relationship Of ◽  
Resistance Performance ◽  
The Relationship

Based on Computational Fluid Dynamics (CFD) method and the wave theory, the analysis of hydrodynamic characteristics is made for a wave-piercing catamaran (WPC) in this paper. The resistances of the WPC with different demi-hull spacing are calculated by use of FLOW-3D, and the relationship of the wave resistance with the demi-hull spacing is also discussed. The comparison of results show that the computational resistance matches the test date well in the design speed. This computational method can predict the coefficient of WPC accurately and can be used as a guidance of WPC initional design and optimization on the demi-hull spacing.

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