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Actuator Disc Modelling for Helicopter Rotors

Le Chuiton, F. (2002) Actuator Disc Modelling for Helicopter Rotors. 28th European Rotorcraft Forum, 2002-09-16 - 2002-09-20, Bristol, UK.

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Abstract

The helicopter project CHANCE contains, among other developments, the quasi-steady approximation to modelling rotors with actuator discs. This reduces the cost of an unsteady simulation down to a stationary one. In testing existing approaches in the literature, the source term implementation proved to perform best especially in forward flight: source terms located on the disc bottom side impart impulse and energy to the fluid. These are obtained from a loose coupling between two DLR codes: the flow solver FLOWer and the rotor code S4. The latter provides a rotor map, a radial and azimuthal force distribution, to the former converting it to the actuator disc map (source terms). Low velocities are accounted for using preconditioning and a more flexible Chimera approach can be used. The actuator disc feature has been developed in a parallel framework for shorter turn-around times. Capturing the fuselage/disc interaction using the Chimera capability is demonstrated on the HELIFUSE C1 configuration. Next the BO-105 fuselage is used to validate the source term approach by means of a uniform pressure jump. The potential disturbance appears clearly on the disc inflow and pressures on the top centreline match with experimental points. Last, the Dauphin 365N configuration has been used to assess the non-uniform actuator disc. It is checked that previous ONERA results are correctly reproduced with a map provided by ONERA. An actuator disc map derived from S4 is used for further investigation. In particular it is shown that the vorticity field is particularly well captured.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2003,
Title:Actuator Disc Modelling for Helicopter Rotors
Authors:
AuthorsInstitution or Email of Authors
Le Chuiton, F.UNSPECIFIED
Date:2002
Page Range:57.1-57.13
Status:Published
Keywords:helicopter rotor, actuator disc modelling
Event Title:28th European Rotorcraft Forum
Event Location:Bristol, UK
Event Type:international Conference
Event Dates:2002-09-16 - 2002-09-20
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:11 Jan 2006
Last Modified:14 Jan 2010 19:05

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