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Pulsed water jet generated by pulse multiplication

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    0472742 - ÚGN 2017 RIV HR eng J - Journal Article
    Dvorský, R. - Sitek, Libor - Sochor, T.
    Pulsed water jet generated by pulse multiplication.
    Technicki vjesnik - Technical Gazette. Roč. 23, č. 4 (2016), s. 959-967. ISSN 1330-3651. E-ISSN 1848-6339
    R&D Projects: GA MŠMT(CZ) LO1406; GA MŠMT ED2.1.00/03.0082
    Institutional support: RVO:68145535
    Keywords : high-pressure pulses * pulse intensifier * pulsed water jet * water hammer effect
    Subject RIV: JQ - Machines ; Tools
    Impact factor: 0.723, year: 2016

    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.
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