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Gardner, Anthony and Braukmann, Johannes N. and Wolf, Christian (2026) Qualitative visualisations of the flow around a BO105 helicopter in ground effect. In: 82th Annual Vertical Flight Society Forum and Technology Display, FORUM 2026. Vertical Flight Society Forum 82 - Annual Forum and Technology Display, 2026-05-05 - 2026-05-07, West Palm Beach, Florida, USA.
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Official URL: https://vtol.org/events/forum-82-annual-forum-and-technology-display
Abstract
This paper presents several methods for measuring large flow fields in the wake of a helicopter, including wind vanes (“flags”), tufts, BOS (Background Oriented Schlieren), and BOS-velocimetry. The motivation is to develop methods that can map the outwash distribution of VTOL aircraft with strongly asymmetric wakes and identify jets that can be particularly dangerous for bystanders. Each measurement technique is shown to have specific advantages, and the resulting flow fields are demonstrated for the BO105 helicopter in hovering flight in ground effect above a tarmac.
| Item URL in elib: | https://elib.dlr.de/224425/ | ||||||||||||||||
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| Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||
| Title: | Qualitative visualisations of the flow around a BO105 helicopter in ground effect | ||||||||||||||||
| Authors: |
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| Date: | 5 May 2026 | ||||||||||||||||
| Journal or Publication Title: | 82th Annual Vertical Flight Society Forum and Technology Display, FORUM 2026 | ||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | No | ||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||
| Editors: |
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| Status: | Published | ||||||||||||||||
| Keywords: | BOS, outwash, helicopter, ground effect | ||||||||||||||||
| Event Title: | Vertical Flight Society Forum 82 - Annual Forum and Technology Display | ||||||||||||||||
| Event Location: | West Palm Beach, Florida, USA | ||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||
| Event Start Date: | 5 May 2026 | ||||||||||||||||
| Event End Date: | 7 May 2026 | ||||||||||||||||
| Organizer: | Vertical Flight Society | ||||||||||||||||
| 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: | Koch, Bianca | ||||||||||||||||
| Deposited On: | 12 May 2026 12:22 | ||||||||||||||||
| Last Modified: | 12 May 2026 12:22 |
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