elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Effect of internal geometry and orientation on the performance of a helium-filled soap bubble nozzle

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), 22.-24. July 2019, Munich, Germany.

[img] PDF
1MB

Official URL: https://www.semanticscholar.org/paper/Effect-of-internal-geometry-and-orientation-on-the-Gibeau-Gingras/532543b024559f6540d6c797b4b3834f83f2b897#paper-header

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/
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:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gibeau, BradleyUniversity of AlbertaUNSPECIFIED
Gingras, DrewUniversity of AlbertaUNSPECIFIED
Raffel, JanUniversity of AlbertaUNSPECIFIED
Raffel, MarkusMarkus.Raffel (at) dlr.dehttps://orcid.org/0000-0002-3340-9115
Ghaemi, Sinaghaemi (at) ualberta.caUNSPECIFIED
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:
EditorsEmailEditor's ORCID iD
Prof. Kähler, Christian J.Universität der Bundeswehr MünchenUNSPECIFIED
Hain, RainerUniversität der Bundeswehr MüncheUNSPECIFIED
Scharnowski, SvenUniversität der Bundeswehr MünchenUNSPECIFIED
Fuchs, ThomasUniversität der Bundeswehr MünchenUNSPECIFIED
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 Dates:22.-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:04 Nov 2021 19:02

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.