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Numerical Investigation of Unsteady Tangential Blowing at the Rudder of a Vertical Tailplane Airfoil

Kröhnert, Anna (2014) Numerical Investigation of Unsteady Tangential Blowing at the Rudder of a Vertical Tailplane Airfoil. 19. DGLR-Fach-Symposium der STAB, 4.-5. November 2014, München.

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Official URL: http://www.stab2014.tum.de/

Abstract

A numerical 2D investigation of a vertical tailplane airfoil using active flow control with tangential blowing over the rudder shoulder is conducted. The aim of the flow control application is to increase the maximum lift or side force which can be created by the vertical tailplane at critical conditions like the one engine-inoperative failure case. On the highly deflected rudder a large separation can be found without blowing. With constant tangential blowing it was shown that fully attached flow can be achieved. To increase the efficiency, pulsed blowing is applied here, leading to a similar increase in the lift coefficient at a reduced actuation mass flow required. Parameters like the blowing momentum coefficient and the dimensionless frequency are varied and the results are compared to those of the flow calculations with constant blowing. It is observed that pulsed blowing with a small momentum coefficient leads to a strong increase in the lift coefficient compared to constant blowing. The resulting lift increment depends on the dimensionless frequency selected.

Item URL in elib:https://elib.dlr.de/93228/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical Investigation of Unsteady Tangential Blowing at the Rudder of a Vertical Tailplane Airfoil
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kröhnert, Annaanna.kroehnert (at) dlr.deUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:2014
Page Range:pp. 32-33
Series Name:STAB-Mitteilung
Status:Published
Keywords:Vertical Tailplane, Active Flow Control, AFC, tangential blowing, CFD, RANS, TAU
Event Title:19. DGLR-Fach-Symposium der STAB
Event Location:München
Event Type:national Conference
Event Dates:4.-5. November 2014
Organizer:Die Deutsche Strömungsmechanische Arbeitsgemeinschaft, STAB
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 - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Kröhnert, Anna
Deposited On:08 Dec 2014 08:39
Last Modified:08 Dec 2014 08:39

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