Article | Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden | Water Hammer Induced Cavitation - A Numerical and Experimental Study
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Title:
Water Hammer Induced Cavitation - A Numerical and Experimental Study
Author:
Marcus Jansson: Atlas Copco Rock Drills AB, SE-701 91 √Ėrebro, Sweden Magnus Andersson: Division of Applied Thermodynamics and Fluid Mechanics, Department of Management and Engineering, Link√∂ping University, Sweden Maria Pettersson: Atlas Copco Rock Drills AB, SE-701 91 √Ėrebro, Sweden Matts Karlsson: Division of Applied Thermodynamics and Fluid Mechanics, Department of Management and Engineering, Link√∂ping University, Sweden
DOI:
10.3384/ecp17144256
Download:
Full text (pdf)
Year:
2017
Conference:
Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden
Issue:
144
Article no.:
025
Pages:
256-260
No. of pages:
5
Publication type:
Abstract and Fulltext
Published:
2017-12-20
ISBN:
978-91-7685-369-6
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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Cavitation erosion is one of the main concerns in hydraulic rock drills and can reduce both performance as well as life span. Current simulation tools can detect a potential risk of cavitation, however, the equations do not include cavitation physics and therefore cannot estimate the severity nor erosion locations. In order to evaluate the cavitation damage, long term tests are performed which are both costly and time consuming. With better computational capacity and more accurate numerical flow models, the possibilities to simulate the course of cavitation have increased. So far, most numerical studies on cavitation focus on steady-state problems while studies on hydraulic transients and water hammer effects have received less attention. This paper is a step towards simulation of water hammer induced cavitation and cavitation erosion in pipe flow using Computational Fluid Dynamics (CFD). In order to validate the results, experimental measurements are performed with a test equipment that creates hydraulic transients in a pipe and records these using piezoelectric pressure sensors. The results from CFD are compared to both the experimental data and to numerical results from a software called Hopsan, a one-dimensional multi-domain system simulation tool that uses wave characteristics to calculate pressures and flows. For smaller transients where no cavitation occur, all results show good agreement. For larger transients with cavitation, the results from Hopsan do not longer agree with the measurements, while the CFD model still performs well and is able to predict both formation and collapse of cavitation.



Keywords: Cavitation, Water hammer, Hydraulic transients, Rock drills, CFD

Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden

Author:
Marcus Jansson, Magnus Andersson, Maria Pettersson, Matts Karlsson
Title:
Water Hammer Induced Cavitation - A Numerical and Experimental Study
DOI:
http://dx.doi.org/10.3384/ecp17144256
References:
No references available

Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden

Author:
Marcus Jansson, Magnus Andersson, Maria Pettersson, Matts Karlsson
Title:
Water Hammer Induced Cavitation - A Numerical and Experimental Study
DOI:
http://dx.doi.org/10.3384/ecp17144256
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Last updated: 2017-02-21