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A Second Turbulent Regime When a Fully Developed Axial Turbulent Flow Enters a Rotating Pipe

Cloos, Ferdinand-J. ; Zimmermann, Anna-L. ; Pelz, Peter F. (2022):
A Second Turbulent Regime When a Fully Developed Axial Turbulent Flow Enters a Rotating Pipe. (Postprint)
In: Proceedings of ASME Turbo Expo 2016 - Turbomachinery Technical Conference and Exposition GT2016, 2B, In: Proceedings of ASME Turbo Expo 2016 - Turbomachinery Technical Conference and Exposition GT2016 June 13-17, 2016, Seoul, South Korea. Volume 2B: Turbomachinery,
Darmstadt, ASME, ASME Turbo Expo 2016 - Turbomachinery Technical Conference and Exposition GT2016, Seoul, South Korea, 13.-17.06.2016, ISBN 978-0-7918-4970-5,
DOI: 10.26083/tuprints-00021469,
[Conference or Workshop Item]

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Item Type: Conference or Workshop Item
Origin: Secondary publication service
Status: Postprint
Title: A Second Turbulent Regime When a Fully Developed Axial Turbulent Flow Enters a Rotating Pipe
Language: English
Abstract:

When a fluid enters a rotating circular pipe a swirl boundary layer with thickness of δ̃s appears at the wall and interacts with the axial momentum boundary layer with thickness of δ̃. We investigate a turbulent flow applying Laser-Doppler-Anemometry to measure the circumferential velocity profile at the inlet of the rotating pipe. The measured swirl boundary layer thickness follows a power law taking Reynolds number and flow number into account. A combination of high Reynolds number, high flow number and axial position causes a transition of the swirl boundary layer development in the turbulent regime. At this combination, the swirl boundary layer thickness as well as the turbulence intensity increase and the latter yields a self-similarity. The circumferential velocity profile changes to a new presented self-similarity as well. We define the transition inlet length, where the transition appears and a stability map for the two regimes is given for the case of a fully developed axial turbulent flow enters the rotating pipe.

Book Title: Proceedings of ASME Turbo Expo 2016 - Turbomachinery Technical Conference and Exposition GT2016 June 13-17, 2016, Seoul, South Korea. Volume 2B: Turbomachinery
Series: Proceedings of ASME Turbo Expo 2016 - Turbomachinery Technical Conference and Exposition GT2016
Series Volume: 2B
Place of Publication: Darmstadt
Publisher: ASME
Collation: 9 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Institute for Fluid Systems (FST)
Event Title: ASME Turbo Expo 2016 - Turbomachinery Technical Conference and Exposition GT2016
Event Location: Seoul, South Korea
Event Dates: 13.-17.06.2016
Date Deposited: 07 Jun 2022 13:37
Last Modified: 07 Jun 2022 13:38
DOI: 10.26083/tuprints-00021469
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-214695
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21469
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