CFD Calculation of the Flow Through a Water-Jet Pump

2001 ◽  
Author(s):  
Peixin Hu ◽  
◽  
M Zangeneh ◽  
Keyword(s):  
Water Jet ◽  
Jet Pump ◽  
Flow Through

scholarly journals Design and Simulation of Nozzle for Pure Water Jet Portable Cutting Tool

2019 ◽  
Vol 8 (12S2) ◽  
pp. 703-706
Keyword(s):  
Pressure Drop ◽  
Cross Sections ◽  
Pure Water ◽  
Water Jet ◽  
Element Analysis ◽  
Cutting Machine ◽  
Water Jet Cutting ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through ◽  
The Impact

A pure water jet at subsonic speed provides an opportunity for application in cutting soft material with the advantage of not contaminating the workpiece. Inside the nozzle, water is flowing through various cross sections, which lead to pressure drop and loss of energy. This requires a nozzle with a design that causes minimum pressure drop. In this work, Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA) were used to analyse the flow through five different nozzles. For each nozzle, the pressures of 10 MPa, 20 MPa and 30 MPa were applies at the inlet. For the inlet pressure of 10 MPa, the highest outlet velocity us 136.12 m/s at the pressure of 9.261 MPa. The impact pressure at stand distance of 0.5 mm and 1.0 mm were 8.26 MPa and 8.02 MPa, respectively. For this nozzle, the Factor of Safety for 10 MPa, 20 MPa and 30 MPa were 6.4, 3.2 and 2.961, respectively. The findings are relevant to the development of pure water jet cutting machine

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.

Investigation of the role of non-uniform suction flow in the performance of water-jet pump

2017 ◽  
Vol 140 ◽  
pp. 258-269 ◽  
Author(s):  
Puyu Cao ◽  
Yang Wang ◽  
Can Kang ◽  
Guidong Li ◽  
Xiang Zhang
Keyword(s):  
Water Jet ◽  
Jet Pump ◽  
Uniform Suction ◽  
Suction Flow

CFD Investigation of Global Performance and Three Dimensional Flows in a Water-Jet Axial Flow Pump

2005 ◽  
Author(s):  
Hong Gao ◽  
Wanlai Lin ◽  
Fangming Ye
Keyword(s):  
Three Dimensional ◽  
Axial Flow ◽  
Flow Fields ◽  
Water Jet ◽  
Jet Pump ◽  
Wall Functions ◽  
Global Performance ◽  
Jet Pumps ◽  
Axial Flow Pump ◽  
Radial Loading

The purpose of the present study is to investigate the global performance and three dimensional flow fields in a water-jet pump. TASCflow software is employed to simulate the rotator-stator coupling flow field. A standard k-ε turbulence model combined with standard wall functions is used. In order to investigate the effect of a rear stator on flow fields, the flows in two water-jet pumps with and without a rear stator are studied. The CFD predicted global performances are in good agreement with the experimental results. Then the flow fields, such as the pressure distribution on the blade surfaces, the axial and tangential velocities distribution, especially the radial loading distribution are investigated at different flow rates. In addition, the effect of a rear stator and different spacing between the rotor and the stator on the global performance and the flow fields of the water-jet pump are also investigated.

scholarly journals Metal Water-Jet Pump

Nature ◽  
1940 ◽  
Vol 146 (3691) ◽  
pp. 127-127
Keyword(s):  
Water Jet ◽  
Jet Pump ◽  
Metal Water

Sub-Scale Versus Full-Scale Testing of Jet Pump Vibration

2005 ◽  
Author(s):  
J. C. Law ◽  
F. J. Moody ◽  
A. L. Laursen
Keyword(s):  
Response Times ◽  
Fluid Pressure ◽  
Full Scale ◽  
Jet Pump ◽  
Full Size ◽  
Scale Test ◽  
Flow Through ◽  
Additional Constraints ◽  
Beam Mode ◽  
Fluid Parameters

Time-dependent fluid pressure forces on jet pump components have been observed to cause destructive mechanical vibrations at a number of BWR plants. A test has been proposed for the purpose of studying the fluid-structure interaction phenomena and to determine what design or operational modifications can be imposed to mitigate or remove the vibration problem. Due to multi-system interactions of this problem, a full-scale test of water flow through a jet pump at reactor conditions is recommended over a sub-scale test. Each system to be studied imposes additional constraints to the modeling laws. Acoustic effects, vortex shedding or shear layer instability, and the fundamental beam mode of the jet pump diffuser all have similar characteristics, or response times. The need to maintain the time scale ratios for all systems implies that a full size system at full size structural and fluid parameters is the most likely success path in obtaining accurate and relevant data.

Performance of a New Type of Water Jet Pump

1990 ◽  
Vol 112 (2) ◽  
pp. 172-174 ◽  
Author(s):  
H. Yano ◽  
J. Funaki ◽  
T. Shinoki ◽  
A. Kieda ◽  
S. Simotori
Keyword(s):  
Water Jet ◽  
Performance Characteristics ◽  
Jet Pump ◽  
Valuable Data ◽  
Low Area ◽  
Large Particles ◽  
New Type

A new type of water jet pump called the bend-type jet pump was investigated both theoretically and experimentally for its performance, with the primary and secondary fluids both being water. The jet pump of this type with comparatively low area ratios is promising to transport liquid containing large particles. Valuable data are given to show its performance characteristics.

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