Geschwindner, Christopher ; Westrup, Katharina ; Dreizler, Andreas ; Böhm, Benjamin (2025)
Ultra-high-speed time-resolved PIV of turbulent flows using a continuously pulsing fiber laser.
In: Experiments in Fluids : Experimental Methods and their Applications to Fluid Flow, 2022, 63 (4)
doi: 10.26083/tuprints-00028530
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
The application of a compact pulsed fiber laser for high-speed time-resolved particle image velocimetry (TR-PIV) measurements in the potential core of a turbulent round jet is presented at repetition rates of up to 500 kHz. The master oscillator power amplifier laser architecture consists of a pulsable seed diode whose emission is amplified in a Yb-doped fiber. The pulsed laser is operated continuously at repetition rates ranging from 10 kHz to 1 MHz with adjustable pulse widths at an output power of 50 W. The maximum rated pulse energy of 486 μJ is reached at 100 kHz, making the laser suitable for measurements of turbulent flows and highly transient phenomena. To demonstrate the feasibility of the laser for flow velocimetry, TR-PIV is conducted in a turbulent round jet. Two different high-speed camera systems are employed: a high-speed CMOS camera running at 200 kHz and 400 kHz and an in situ storage CCD camera for burst-mode PIV measurements at 500 kHz. For the CMOS system, the capability of measuring several characteristic quantities of turbulent flows is discussed with regard to the effects of uncertainty and spatial resolution. The presented system extends the range of suitable laser systems for high-speed PIV measurements offering continuous pulsing at repetition rates of up to 1 MHz at a compact footprint. The amount of consecutive images is solely limited by the onboard storage of the camera, which enables unprecedented temporal dynamic ranges.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2025 |
| Autor(en): | Geschwindner, Christopher ; Westrup, Katharina ; Dreizler, Andreas ; Böhm, Benjamin |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Ultra-high-speed time-resolved PIV of turbulent flows using a continuously pulsing fiber laser |
| Sprache: | Englisch |
| Publikationsjahr: | 16 Januar 2025 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | April 2022 |
| Ort der Erstveröffentlichung: | 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: | 63 |
| (Heft-)Nummer: | 4 |
| Kollation: | 18 Seiten |
| DOI: | 10.26083/tuprints-00028530 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/28530 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | The application of a compact pulsed fiber laser for high-speed time-resolved particle image velocimetry (TR-PIV) measurements in the potential core of a turbulent round jet is presented at repetition rates of up to 500 kHz. The master oscillator power amplifier laser architecture consists of a pulsable seed diode whose emission is amplified in a Yb-doped fiber. The pulsed laser is operated continuously at repetition rates ranging from 10 kHz to 1 MHz with adjustable pulse widths at an output power of 50 W. The maximum rated pulse energy of 486 μJ is reached at 100 kHz, making the laser suitable for measurements of turbulent flows and highly transient phenomena. To demonstrate the feasibility of the laser for flow velocimetry, TR-PIV is conducted in a turbulent round jet. Two different high-speed camera systems are employed: a high-speed CMOS camera running at 200 kHz and 400 kHz and an in situ storage CCD camera for burst-mode PIV measurements at 500 kHz. For the CMOS system, the capability of measuring several characteristic quantities of turbulent flows is discussed with regard to the effects of uncertainty and spatial resolution. The presented system extends the range of suitable laser systems for high-speed PIV measurements offering continuous pulsing at repetition rates of up to 1 MHz at a compact footprint. The amount of consecutive images is solely limited by the onboard storage of the camera, which enables unprecedented temporal dynamic ranges. |
| ID-Nummer: | Artikel-ID: 75 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-285309 |
| 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 DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios > TRR 150 Turbulent chemisch reagierende Mehrphasenströmungen in Wandnähe 16 Fachbereich Maschinenbau > Fachgebiet Reaktive Strömungen und Messtechnik (RSM) |
| Hinterlegungsdatum: | 16 Jan 2025 10:05 |
| Letzte Änderung: | 17 Jan 2025 15:54 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Ultra-high-speed time-resolved PIV of turbulent flows using a continuously pulsing fiber laser. (deposited 16 Jan 2025 10:05) [Gegenwärtig angezeigt]
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