Gibeau, Bradley and Gingras, Drew and Raffel, Jan and Raffel, Markus and Ghaemi, Sina (2019) Effect of internal geometry and orientation on the performance of a helium-filled soap bubble nozzle. In: Proceedings of the 13th International Symposium on Particle Image Velocimetry, pp. 1-10. Universität der Bundeswehr München: AtheneForschung. 13th International Symposium on Particle Image Velocimetry (ISPIV 2019), 2019-07-22 - 2019-07-24, Munich, Germany.
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Abstract
Various design considerations for helium-filled soap bubble generators are investigated. These include the effects of modifying internal nozzle geometry and nozzle operating orientation on nozzle performance, as well as the tracing fidelity of the bubbles produced by a multi-nozzle system and the impact of placing a full-scale generator in the settling chamber of a wind tunnel. Modifications to internal nozzle geometry are found to directly impact the nozzle production regimes, and some evidence is provided to suggest that operating orientation does the same. The mean time responses are found to obey a previously defined theoretical relationship (Engler Faleiros et al. 2019, Exp Fluids), and the standard deviations of the time response distributions indicate that 95% of the bubbles produced by the system will accurately track velocity fluctuations with a time scale of 3 ms or greater when the bubbles are neutrally buoyant on average. Placing a full-scale generator in the settling chamber of a wind tunnel is found to increase the maximum freestream deficit by up to 1.2% and the freestream turbulence intensity by at most 0.3% for freestream velocities between 6 and 30 m/s.
Item URL in elib: | https://elib.dlr.de/144211/ | ||||||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||||||
Title: | Effect of internal geometry and orientation on the performance of a helium-filled soap bubble nozzle | ||||||||||||||||||||||||
Authors: |
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Date: | 2019 | ||||||||||||||||||||||||
Journal or Publication Title: | Proceedings of the 13th International Symposium on Particle Image Velocimetry | ||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||
Page Range: | pp. 1-10 | ||||||||||||||||||||||||
Editors: |
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Publisher: | Universität der Bundeswehr München: AtheneForschung | ||||||||||||||||||||||||
Series Name: | Conference Proceedings online | ||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||
Keywords: | PIV, Particle Image Velocimetry, tracer particle, soap bubble, wind tunnel | ||||||||||||||||||||||||
Event Title: | 13th International Symposium on Particle Image Velocimetry (ISPIV 2019) | ||||||||||||||||||||||||
Event Location: | Munich, Germany | ||||||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||||||
Event Start Date: | 22 July 2019 | ||||||||||||||||||||||||
Event End Date: | 24 July 2019 | ||||||||||||||||||||||||
Organizer: | UniBw München | ||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||
HGF - Program: | Aeronautics | ||||||||||||||||||||||||
HGF - Program Themes: | Efficient Vehicle | ||||||||||||||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||||||||||||||
DLR - Program: | L EV - Efficient Vehicle | ||||||||||||||||||||||||
DLR - Research theme (Project): | L - Virtual Rotorcraft and Validation | ||||||||||||||||||||||||
Location: | Göttingen | ||||||||||||||||||||||||
Institutes and Institutions: | Institute for Aerodynamics and Flow Technology > Helicopter, GO | ||||||||||||||||||||||||
Deposited By: | Carter, Beatrice | ||||||||||||||||||||||||
Deposited On: | 04 Nov 2021 19:02 | ||||||||||||||||||||||||
Last Modified: | 24 Apr 2024 20:43 |
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