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The Case for Counter-Rotation of Installed Contra-Rotating Open Rotor Propulsion Systems

Stürmer, Arne and Yin, Jianping (2012) The Case for Counter-Rotation of Installed Contra-Rotating Open Rotor Propulsion Systems. 30th AIAA Applied Aerodynamics Conference, 25-28 June 2012, New Orleans, LA, USA.

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Contra Rotating Open Rotor (CROR) propulsion systems have seen renewed interest as a possible economic and environmentally friendly powerplant for future transport aircraft. Installation effects, i.e. the mutual interactions between airframe components and the rotors, have a pronounced impact on the aerodynamic and aeroacoustic performance for this type of engine. In this paper, the impact on aerodynamic performance and noise emissions caused by the presence of a pylon as well as a variation in the sense of rotation of the rotors is numerically studied for a representative 10x8-bladed pusher-configuration CROR engine at typical take-off conditions. In particular, the sense of rotation influence on blade and rotor performance and loadings as well as on the handling quality relevant in-plane rotor forces is analyzed, as is the resulting impact on the noise emissions in the near- and farfield and the flyover noise results. Having been widely applied to the simulations of single as well as contra-rotation propellers, the DLR CFD code TAU and the aeroacoustic analysis tool APSIM allow for a detailed analysis and an improved understanding of the complex aerodynamics and aeroacoustics of this type of propulsion system.

Item URL in elib:https://elib.dlr.de/78045/
Document Type:Conference or Workshop Item (Speech)
Title:The Case for Counter-Rotation of Installed Contra-Rotating Open Rotor Propulsion Systems
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Stürmer, Arnearne.stuermer (at) dlr.deUNSPECIFIED
Yin, Jianpingjianping.yin (at) dlr.deUNSPECIFIED
Date:25 June 2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Contra-Rotating Open Rotor, CROR, uRANS, CFD, CAA, Interaction tones
Event Title:30th AIAA Applied Aerodynamics Conference
Event Location:New Orleans, LA, USA
Event Type:international Conference
Event Dates:25-28 June 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Transport Aircraft
Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Stürmer, Arne
Deposited On:15 Nov 2012 11:39
Last Modified:26 Mar 2015 13:48

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