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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.
ASME Turbo Expo 2016 - Turbomachinery Technical Conference and Exposition GT2016. Seoul, South Korea (13.-17.06.2016)
doi: 10.26083/tuprints-00021469
Conference or Workshop Item, Secondary publication, Postprint

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Item Type: Conference or Workshop Item
Type of entry: Secondary publication
Title: A Second Turbulent Regime When a Fully Developed Axial Turbulent Flow Enters a Rotating Pipe
Language: English
Date: 2022
Place of Publication: Darmstadt
Publisher: ASME
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
Collation: 9 Seiten
Event Title: ASME Turbo Expo 2016 - Turbomachinery Technical Conference and Exposition GT2016
Event Location: Seoul, South Korea
Event Dates: 13.-17.06.2016
DOI: 10.26083/tuprints-00021469
Corresponding Links:
Origin: Secondary publication service
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.

Status: Postprint
URN: urn:nbn:de:tuda-tuprints-214695
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering > Institute for Fluid Systems (FST) (since 01.10.2006)
Date Deposited: 07 Jun 2022 13:37
Last Modified: 11 Apr 2023 10:41
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21469
PPN: 496555170
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