elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Numerical investigation of slot variations on the efficiency of tangential blowing at a vertical tailplane with infinite span

Gebhardt, Anna and Kirz, Jochen (2018) Numerical investigation of slot variations on the efficiency of tangential blowing at a vertical tailplane with infinite span. CEAS Aeronautical Journal, 9 (1), pp. 195-206. Springer. DOI: 10.1007/s13272-018-0288-1 ISSN 1869-5582

[img] PDF
4MB

Official URL: http://link.springer.com/article/10.1007/s13272-018-0288-1

Abstract

On a swept vertical tailplane with infinite span tangential blowing over the shoulder of a deflected rudder is applied. For large rudder deflection angles the flow on the rudder is separated without blowing. A numerical study is conducted with the aim to increase the side force coefficient. This could, for example, be required during take-off if the engine on one side fails, necessitating the compensation of a large yawing moment. If this criterion is critical for the sizing of the vertical tailplane, active flow control like tangential blowing could help to reduce the size of the vertical tailplane and thus save weight and fuel. With a continuous slot it is demonstrated that the separation on the rudder can be reduced or avoided. It is shown that using discrete slots this can be achieved with a smaller momentum coefficient. To analyze the effects of the discrete slots and their jets on each other and their effectivity with regard to the gain in side force coefficient a parameter study is conducted. The number of slots as well as the size of the slots in spanwise direction is varied and the impact of Jet velocity changes is also studied. In comparing the results for a constant increase in side force and constant slot size in spanwise direction the configuration with the smaller number of slots but a higher jet velocity proved to be the most effective one.

Item URL in elib:https://elib.dlr.de/119371/
Document Type:Article
Title:Numerical investigation of slot variations on the efficiency of tangential blowing at a vertical tailplane with infinite span
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gebhardt, AnnaAnna.Gebhardt (at) dlr.deUNSPECIFIED
Kirz, JochenJochen.Kirz (at) dlr.deUNSPECIFIED
Date:March 2018
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:9
DOI :10.1007/s13272-018-0288-1
Page Range:pp. 195-206
Publisher:Springer
ISSN:1869-5582
Status:Published
Keywords:Active flow control,� CFD,� Tangential blowing,� Vertical tailplane,� RANS
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 for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Kröhnert, Anna
Deposited On:23 Mar 2018 09:22
Last Modified:06 Sep 2019 15:24

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.