Original scientific paper

https://doi.org/10.17559/TV-20140213180726

Pulsed water jet generated by pulse multiplication

Richard Dvorsky ; VŠB - Technical University of Ostrava, Department of Physics, Regional Materials Science and Technology Centre, 17. listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic
Libor Sitek ; Institute of Geonics of the AS CR, v.v.i., Department of material disintegration, Studentská 1768, 708 00 Ostrava-Poruba, Czech Republic
Tomáš Sochor orcid.org/0000-0002-1704-1883 ; University of Ostrava, Department of Informatics and Computers, 30. dubna 22, 701 03 Ostrava, Czech Republic

Abstract

First theoretical papers, summarizing the high mechanical energy cumulation when high-speed drops impact on the solid surface as a result of the water hammer effect, have been known since 1960’s. Heymann has demonstrated that pressure maximum during the impact of a spherical drop of a liquid is several times higher than the presupposed maximum for the classical waterhammer effect. The mentioned maximum pressure exceeds the stagnation pressure of the continuous jet several times over. When developing devices for pulsed jet generation, a new generalization of the classical water hammer theory for high pressures has been introduced. Based on this a new patented principle of "pulse multiplication" has been formulated. The pulse multiplier is the source of high-pressure pulses with 100 % depth of modulation of discharge velocity of a liquid jet. It enables to significantly increase the jet disintegration effect without addition of abrasives.

Keywords

high-pressure pulses; pulse intensifier; pulsed water jet; water hammer effect

Hrčak ID:

163752

URI

https://hrcak.srce.hr/163752

Publication date:

16.8.2016.

Article data in other languages: croatian

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