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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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)|
|Title:||Actuator Disc Modelling for Helicopter Rotors|
|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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