Modelling of Slurry-Handling Piping Element Under Interference Conditions

Volume 3 ◽  
2004 ◽  
Author(s):  
Prem Chand ◽  
K. Govinda Rajulu ◽  
Y. Krishna Reddy
Keyword(s):  
Particle Diffusion ◽  
Test Rig ◽  
Jet Pump ◽  
Two Phase ◽  
New Approach ◽  
Jet Pumps ◽  
Flow Through ◽  
Extensive Experimental Data ◽  
Fluid Interaction ◽  
Layer Concept

The paper presents a new approach to predict the two-phase performance of jet-pumps under interference conditions. We limit our study mainly to diffuser and transport regions of the jet pump. The five essential pre-requisites which form the backbone of our approach are a fairly generalized and accurate approach to (i) solid-fluid interaction, (ii) particle diffusion under generalized flow field, (iii) friction factor-Reynolds number equation, (iv) solid-fluid flow through ducts and (v) mixing of primary and secondary jets using the approach of Wang et al. [1] based on boundary layer concept. The extensive experimental data of several research workers along with fresh data generated on specially designed test-rig support the new approach.

Numerical and experimental study of steam-water two-phase flow through steam jet pump

2013 ◽  
Vol 8 (6) ◽  
pp. 895-905 ◽  
Author(s):  
Ajmal Shah ◽  
Alamdar Hussain Khan ◽  
Imran Rafiq Chughtai ◽  
Mansoor Hameed Inayat
Keyword(s):  
Experimental Study ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Jet Pump ◽  
Two Phase ◽  
Flow Through

Wear in Bends Conveying Air-Solid Mixture

2002 ◽  
Author(s):  
Prem Chand ◽  
Ahindra Chandra Saha
Keyword(s):  
Gas Flow ◽  
Vertical Plane ◽  
Test Case ◽  
Test Rig ◽  
Correct Evaluation ◽  
Solid Mixture ◽  
Flow Through ◽  
Set Up ◽  
Bottom To Top ◽  
Fluid Interaction

This paper aims at establishing a generalized method for predicting wear due to solid-gas flow through a duct. It has been opined that not only does the duct wear out, the particles carried through the duct themselves degrade in the process. The correct evaluation of the fluid-particle, particle-duct and fluid-duct interactions forms the basis of the theoretical equation proposed for the purpose. The method proposed is verified by conducting experiments on a well-designed set-up. The test rig helped to evaluate the essential parameters responsible for the wear such as the material, duct and fluid interaction parameters. As a test case, a 90° bend placed in a vertical plane carrying material from bottom to top has been considered.

Liquid Jet Pumps for Two-Phase Flows

1995 ◽  
Vol 117 (2) ◽  
pp. 309-316 ◽  
Author(s):  
R. G. Cunningham
Keyword(s):  
Secondary Flow ◽  
Gas Flow ◽  
Secondary Flows ◽  
Operating Conditions ◽  
Liquid Jet ◽  
Dimensionless Number ◽  
Jet Pump ◽  
Two Phase ◽  
Performance Curves ◽  
Jet Pumps

Isothermal compression of a bubbly secondary fluid in a mixing-throat and diffuser is described by a one-dimensional flow model of a liquid-jet pump. Friction-loss coefficients used in the four equations may be determined experimentally, or taken from the literature. The model reduces to the liquid-jet gas compressor case if the secondary liquid is zero. Conversely, a zero secondary-gas flow reduces the liquid-jet gas and liquid (LJGL) model to that of the familiar liquid-jet liquid pump. A “jet loss” occurs in liquid-jet pumps if the nozzle tip is withdrawn from the entrance plane of the throat, and jet loss is included in the efficiency equations. Comparisons are made with published test data for liquid-jet liquid pumps and for liquid-jet gas compressors. The LJGL model is used to explore jet pump responses to two-phase secondary flows, nozzle-to-throat area ratio, and primary-jet velocity. The results are shown in terms of performance curves versus flow ratios. Predicted peak efficiencies are approximately 50 percent. Under severe operating conditions, LJGL pump performance curves exhibit maximum-flow ratios or cut-offs. Cut-off occurs when two-phase secondary-flow streams attain sonic values at the entry of the mixing throat. A dimensionless number correlates flow-ratio cut-offs with pump geometry and operating conditions. Throat-entry choking of the secondary flow can be predicted, hence avoided, in designing jet pumps to handle two-phase fluids.

Pressure Drop for Oil-Gas Two-Phase Flow Through Straight Horizontal Pipe

2007 ◽  
Author(s):  
Wenhong Liu ◽  
Liejin Guo ◽  
Ximin Zhang ◽  
Kai Lin ◽  
Long Yang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Through ◽  
Oil Gas

scholarly journals Determination of cross-sectional void fraction in a two-phase water flow through a PVC pipe

2021 ◽  
Vol 655 (1) ◽  
pp. 012024
Author(s):  
O.H. Ajesi ◽  
M.B. Latif ◽  
S.T. Gbenu ◽  
C. A. Onumejor ◽  
M. K. Fasasi ◽  
...  
Keyword(s):  
Water Flow ◽  
Void Fraction ◽  
Two Phase ◽  
Cross Sectional ◽  
Flow Through ◽  
Pvc Pipe ◽  
Phase Water
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