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Analysis of a CROR Propulsion System at High Angle of Attack and at Low Speed Flight Conditions

Marquez Gutierrez, Carlos Omar and Steiner, Sören (2013) Analysis of a CROR Propulsion System at High Angle of Attack and at Low Speed Flight Conditions. 13th ONERA-DLR Aerospace Symposium, 27.-29. Mai 2013, Palaiseau, France.

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Abstract

In the present investigation, Computational Fluid Dynamics (CFD) simulations of semi-installed Contra-Rotating Open Rotor (CROR) propulsion systems are performed. The studied CROR geometry was developed by Rolls-Royce and consists of a wind tunnel scaled 12x9 CROR with different rotor diameters and unequal rotational speeds. The numerical simulations are performed at low speed flight conditions for two angles of attack at 0°and 10°. The results are compared with WTT data toassess the accuracy of the unsteady Reynolds Averaged Navier-Stokes (uRANS) and the steady (Actuator Disk model) approaches for the simulation of rotatory systems implemented in the DLR-Tau code. The results show a good agreement of the predicted performance numbers of the propeller, but some deviations probably due to blade deformation are still observed especially on the front rotor performance. The wake measurements downstream of the rotor planes show a very good agreement between CFD and WTT and are in line with the predicted rotor performance. Important conclusions are extracted for the case at angle of attack 10° such as the effect of the front blade tip vortex impingement on the aft propeller which is relevant for the acoustics and vibration analysis during the blade design process.

Item URL in elib:https://elib.dlr.de/83251/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Analysis of a CROR Propulsion System at High Angle of Attack and at Low Speed Flight Conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Marquez Gutierrez, Carlos Omarcarlos.marquezgutierrez (at) dlr.deUNSPECIFIED
Steiner, SörenRolls-Royce DeutschlandUNSPECIFIED
Date:May 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CROR, Open Rotor, CFD, Actuator Disk
Event Title:13th ONERA-DLR Aerospace Symposium
Event Location:Palaiseau, France
Event Type:international Conference
Event Dates:27.-29. Mai 2013
Organizer:ONERA
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
Deposited By: Marquez Gutierrez, Carlos Omar
Deposited On:15 Jul 2013 13:56
Last Modified:12 Dec 2013 22:07

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