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Progress in Aerodynamic and Aeroacoustic Integration of CROR Propulsion Systems

Stürmer, Arne and Yin, Jianping and Akkermans, R.A.D. (2014) Progress in Aerodynamic and Aeroacoustic Integration of CROR Propulsion Systems. The Aeronautical Journal, 118 (1208), pp. 1137-1158. Cambridge University Press. doi: 10.1017/s0001924000009829. ISSN 0001-9240.

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Official URL: http://aerosociety.com/News/Publications/Aero-Journal/Online/2523/Progress-in-aerodynamic-and-aeroacoustic-integration-of-cror-propulsion-systems


Contra-Rotating Open Rotor (CROR) propulsion systems have seen renewed interest as an 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 the past five years, DLR’s Institute of Aerodynamics and Flow Technology has performed a number of numerical studies investigating important aspects relating to engine-airframe integration of CROR engines. In this article an overview of coupled aerodynamic and aeroacoustic simulations investigating representative pusher-configuration CROR engines will be given, focusing on the impact on aerodynamic performance and aeroacoustics caused by the presence of a pylon, the potential for noise reduction by employing trailing-edge blowing at the pylon trailing edge as well as the performance and noise variations caused by different senses of rotation of the rotors. It is shown that the interaction with the pylon strongly impacts blade performance and front rotor noise emissions but that the use of active flow control in the form of pylon trailing-edge blowing can alleviate these adverse installation effects to a notable extent.

Item URL in elib:https://elib.dlr.de/92429/
Document Type:Article
Additional Information:Paper No. 4078
Title:Progress in Aerodynamic and Aeroacoustic Integration of CROR Propulsion Systems
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:The Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1137-1158
EditorsEmailEditor's ORCID iDORCID Put Code
Bearman, PeterImperial College LondonUNSPECIFIEDUNSPECIFIED
Publisher:Cambridge University Press
Keywords:Aerodynamics, Aeroacoustics, CROR, Propeller, Unsteady
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
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 > Technical Acoustics
Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Seyfried, Beate
Deposited On:24 Nov 2014 15:54
Last Modified:14 Jun 2023 15:39

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