Heister, C. C. (2011) Semi/empirical Transition Prediction and Application to an Isolated Rotor in Hover. 46th Symposium of Applied Aerodynamics, 28.-30. März 2011, Orleans, Frankreich.
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Abstract
The transition prediction capability of two semi/empirical methods originating from fixed wing applications is studied for steady, rotary wing application. This includes the AHD criterion, and two variants of the Michel criterion. Both criteria are used with approximated boundary layer data, aiming to reduce dependency on near wall grid quality. The prediction methods have been implemented in the DLR’s structured flow solver FLOWer. A two-dimensional airfoil test case (Somers NLF(1)-0416) is used to study prediction accuracy, comparing three different turbulence models. A three-dimensional rotor test case at hover (DLR Bo 105 flight test) serves to validate the criteria’s computed transition locations. The influence of the criteria’s distinct laminar run-ning lengths on the rotor’s performance is shown by a relative comparison of figure of merit.
Item URL in elib: | https://elib.dlr.de/79458/ | ||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||
Title: | Semi/empirical Transition Prediction and Application to an Isolated Rotor in Hover | ||||||
Authors: |
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Date: | March 2011 | ||||||
Refereed publication: | No | ||||||
Open Access: | No | ||||||
Gold Open Access: | No | ||||||
In SCOPUS: | No | ||||||
In ISI Web of Science: | No | ||||||
Status: | Published | ||||||
Keywords: | transition, prediction, empirical, AHD, Michel, boundary layer, approximation, CFD, FLOWer, helicopter, rotor, hover, performance flight test | ||||||
Event Title: | 46th Symposium of Applied Aerodynamics | ||||||
Event Location: | Orleans, Frankreich | ||||||
Event Type: | international Conference | ||||||
Event Dates: | 28.-30. März 2011 | ||||||
Organizer: | 3AF | ||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||
HGF - Program: | Aeronautics | ||||||
HGF - Program Themes: | Rotorcraft (old) | ||||||
DLR - Research area: | Aeronautics | ||||||
DLR - Program: | L RR - Rotorcraft Research | ||||||
DLR - Research theme (Project): | L - The Virtual Aerodynamic Rotorcraft (old) | ||||||
Location: | Braunschweig | ||||||
Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Helicopters | ||||||
Deposited By: | Heister, Christoph | ||||||
Deposited On: | 06 Dec 2012 15:56 | ||||||
Last Modified: | 30 Jun 2016 10:22 |
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