Numerical modelling of percussion water jets driven by multiple collisions

Lu, Zhaohui, Qin, Zongyi, Hood, Michael, Lu, Yiyu and Tadic, Dihon (2015) Numerical modelling of percussion water jets driven by multiple collisions. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 229 5: 976-984. doi:10.1177/0954406214541797


Author Lu, Zhaohui
Qin, Zongyi
Hood, Michael
Lu, Yiyu
Tadic, Dihon
Title Numerical modelling of percussion water jets driven by multiple collisions
Journal name Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science   Check publisher's open access policy
ISSN 2041-2983
0954-4062
Publication date 2015-04-04
Year available 2014
Sub-type Article (original research)
DOI 10.1177/0954406214541797
Open Access Status
Volume 229
Issue 5
Start page 976
End page 984
Total pages 9
Place of publication London, United Kingdom
Publisher Sage Publications
Collection year 2015
Language eng
Abstract A numerical model is proposed in this research to analyse the behaviour of the pulse jet driven by percussion hammer. The mass of the hammer is usually larger than that of the piston and the resistance of compressed water can low down the piston, thus multiple collisions occur each time when the hammer strikes the piston. The proposed model has the merit to consider various striking possibilities to simulate the process of pulse water jet generated by multiple hammer collisions. In addition, a hammer-driven percussion pulse jet is developed and the corresponding experiments are carried out for verifying the reliability of the numerical model. Comparison results show that the predicted pressure and velocity values match well with the experimental data. The simulation of the generation of pulsed jet reveals the collisions and motions of the hammer and the piston and provides understanding of the mechanism of the pulse jet generation. The design of the hammer-driven pulse water jet device can be optimised through modelling different combinations of the parameters of the chamber, hammer, piston and nozzle for a specific purpose of rock fragmentation.
Keyword Percussion water jet
Numerical modelling
Mechanical collisions
Optimum design
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 30 June 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
 
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