Jasper, Sarah ; Hussong, Jeanette ; Lindken, Ralph (2021)
PIV investigation of high Reynolds number submerged water jets at high-pressure ambient conditions.
In: Experiments in Fluids : Experimental Methods and their Applications to Fluid Flow, 62 (5)
doi: 10.1007/s00348-021-03167-x
Artikel, Bibliographie
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Kurzbeschreibung (Abstract)
High-pressure water jets bear a great technological potential to enhance geothermal deep drilling. Compared to existing water cutting technologies, significantly different operation conditions are encountered under deep-drilling conditions, such as high ambient pressures. The fundamental fluid mechanics are significantly affected by those operation conditions. In this work we examine the influence of increasing ambient pressure of up to 12.0 MPa on the water jet characteristics under submerged drilling conditions. PIV measurements of the jet flow field at changing cavitation numbers reveal two characteristic regimes, which are distinguished by a critical cavitation number. In the cavitating regime, the jet decays considerably faster with increasing distance to the nozzle than in the non-cavitating regime. In addition to that, an increasing cavitation intensity shortens the potential core length of the water jet and increases the jet spreading angle and with this has a similar effect on the jet as increasing turbulence intensity in single-phase flows. Related to the decreasing kinetic energy of the jet in the cavitating regime, the resulting impact force of the water jet on the specimen surface decreases with increasing cavitation intensity. Our investigations indicate that a technology transfer from water jet cutting to submerged jet drilling requires adjustments of both nozzle geometries and jet operation conditions.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Jasper, Sarah ; Hussong, Jeanette ; Lindken, Ralph |
| Art des Eintrags: | Bibliographie |
| Titel: | PIV investigation of high Reynolds number submerged water jets at high-pressure ambient conditions |
| Sprache: | Englisch |
| Publikationsjahr: | Mai 2021 |
| Ort: | Berlin ; Heidelberg |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Experiments in Fluids : Experimental Methods and their Applications to Fluid Flow |
| Jahrgang/Volume einer Zeitschrift: | 62 |
| (Heft-)Nummer: | 5 |
| Kollation: | 15 Seiten |
| DOI: | 10.1007/s00348-021-03167-x |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | High-pressure water jets bear a great technological potential to enhance geothermal deep drilling. Compared to existing water cutting technologies, significantly different operation conditions are encountered under deep-drilling conditions, such as high ambient pressures. The fundamental fluid mechanics are significantly affected by those operation conditions. In this work we examine the influence of increasing ambient pressure of up to 12.0 MPa on the water jet characteristics under submerged drilling conditions. PIV measurements of the jet flow field at changing cavitation numbers reveal two characteristic regimes, which are distinguished by a critical cavitation number. In the cavitating regime, the jet decays considerably faster with increasing distance to the nozzle than in the non-cavitating regime. In addition to that, an increasing cavitation intensity shortens the potential core length of the water jet and increases the jet spreading angle and with this has a similar effect on the jet as increasing turbulence intensity in single-phase flows. Related to the decreasing kinetic energy of the jet in the cavitating regime, the resulting impact force of the water jet on the specimen surface decreases with increasing cavitation intensity. Our investigations indicate that a technology transfer from water jet cutting to submerged jet drilling requires adjustments of both nozzle geometries and jet operation conditions. |
| Freie Schlagworte: | Engineering Fluid Dynamics, Fluid- and Aerodynamics, Engineering Thermodynamics, Heat and Mass Transfer |
| ID-Nummer: | Artikel-ID: 97 |
| Zusätzliche Informationen: | Part of a collection: Applications of Laser and Imaging Technique to Fluid Mechanics. 20th International Symposium in Lisbon 2020 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Strömungslehre und Aerodynamik (SLA) |
| Hinterlegungsdatum: | 27 Mär 2024 09:58 |
| Letzte Änderung: | 27 Mär 2024 09:58 |
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| Suche nach Titel in: | TUfind oder in Google |
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PIV investigation of high Reynolds number submerged water jets at high-pressure ambient conditions. (deposited 26 Mär 2024 13:58)
- PIV investigation of high Reynolds number submerged water jets at high-pressure ambient conditions. (deposited 27 Mär 2024 09:58) [Gegenwärtig angezeigt]
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