{"id":6517,"date":"2026-06-20T17:01:14","date_gmt":"2026-06-20T09:01:14","guid":{"rendered":"\/jase\/?post_type=tkuisotope&p=6517"},"modified":"2026-08-19T23:32:32","modified_gmt":"2026-08-19T15:32:32","slug":"experimental-research-on-the-waterjet-oscillating-characteristics-of-helmholtz-nozzle","status":"publish","type":"tkuisotope","link":"\/jase\/?tkuisotope=experimental-research-on-the-waterjet-oscillating-characteristics-of-helmholtz-nozzle","title":{"rendered":"Experimental Research on the Waterjet Oscillating Characteristics of Helmholtz Nozzle"},"content":{"rendered":"\n
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<\/i> 2019<\/a><\/p>\n<\/div>\n\n\n\n

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<\/i> Volume 22, Issue 1<\/a><\/p>\n<\/div>\n\n\n\n

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Wei Ma1<\/sup>, Tengfei Cai2<\/sup> and Fei Ma2<\/sup><\/i><\/a><\/p>\n\n\n\n

1<\/sup>School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, P.R. China <\/p>\n\n\n\n

2<\/sup>School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, P.R. China<\/p>\n<\/div>\n\n\n\n

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Received:\u00a0May 24, 2018
Accepted:\u00a0November 12, 2018
Publication Date:\u00a0June 20, 2026<\/p>\n<\/div>\n<\/div>\n\n\n\n

\"\u4e0a\u50b3\u5716\u7247\"\n\n\n

Experimental structures of organ-pipe, Helmholtz
and conicalnozzles.<\/p>\n<\/div>\n<\/div>\n\n\n\n

<\/i> Copyright <\/strong>The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0)<\/a>, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.<\/p>\n\n\n\n

Download Citation:  BibTeX <\/a>| http:\/\/dx.doi.org\/10.6180\/jase.201903_22(1).0009<\/a>  <\/p>\n\n\n\n

Download PDF<\/a><\/p>\n\n\n\n

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Helmholtz nozzle is a typical self-resonating waterjet generator, and has been extensively investigated through target hitting experiment. This paper on jet flow state reveals the essential characteristics of Helmholtz nozzle jet by signal analysis method. The flow pressure pulsation signals were directly acquired in the nozzle\u2019s cavity. Spectrum analysis was employed to analyze the oscillating characteristics of self-resonating waterjet generated by a series of Helmholtz nozzles with different structures. The noise level was detected using self-resonating waterjet to hit the target under confining pressure and the cavitation effect was investigated through analyzing the noise power spectrum. The experimental results showed that compared with the organ-pipe and conical nozzles, the self-resonating waterjet generated by Helmholtz nozzle had high-frequency pressure oscillation and strong cavitation effects. The Helmholtz nozzle\u2019s upper portion determines the resonance frequency. Meanwhile, The upper structure of the Helmholtz nozzle promotes the cavitation generation, and Helmholtz oscillation cavity enhances the cavitation effect of the self-resonating waterjet.<\/p>\n\n\n\n

Keywords:\u00a0Helmholtz Nozzle, Self-resonating Waterjet, Frequency Characteristics, Cavitation Noise, Signal Analysis<\/em><\/p>\n\n\n\n

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