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Improvement of the SERN nozzle performence by aerodynamic flap design ( Verbesserung der Leistung einer SERN-Düse durch aerodynamische Gestaltung der Düsenklappe

Gruhn, P. and Henckels, A. and Sieberger, G. (2002) Improvement of the SERN nozzle performence by aerodynamic flap design ( Verbesserung der Leistung einer SERN-Düse durch aerodynamische Gestaltung der Düsenklappe. Aerospace Science and Technology, 6, pp. 395-405.

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Abstract

As continuation of the former study [P. Gruhn et al., Aerospace Science and Technology 4 (2000) 555-565[, we examine the flow at a SERN nozzle for a future hypersonic cruise vehicle with help of a nozzle/afterbody wind tunnel model. Main focus is on the flow at the nozzle flap and the separation of the boundary layer at the flap cowl. The location of this separation is determined for different nozzle/afterbody model is established. Based on the experiments and recent studies, a geoemtry for the nozzle flap of the ference configuration ELAC of the Collaborative Research Center 253 of the Aachen University of Technology is suggested. Numerical studies result in an improved axial thrust going along with an improved thrust vector angle for this new flap in the whole examined Mach range between 1.23 and 7. The improvements of up to 11 percent in axial thrust coefficient and up to 15° in thrust vector angle at low Mach numbers exceed the progresses made for the nozzle of the nozzle/afterbody model in the former study.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2004,
Title:Improvement of the SERN nozzle performence by aerodynamic flap design ( Verbesserung der Leistung einer SERN-Düse durch aerodynamische Gestaltung der Düsenklappe
Authors:
AuthorsInstitution or Email of Authors
Gruhn, P.UNSPECIFIED
Henckels, A.UNSPECIFIED
Sieberger, G.UNSPECIFIED
Date:2002
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:6
Page Range:pp. 395-405
Status:Published
Keywords:SERN nozzle; Boundary layer separation; Hypersonic air-breathing propulsion
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: elib DLR-Beauftragter
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 21:05

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