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Experimental Investigation of the Starting Behavior of a Three-Dimensional Scramjet Intake

Flock, Andreas K. and Gülhan, Ali (2015) Experimental Investigation of the Starting Behavior of a Three-Dimensional Scramjet Intake. AIAA Journal, 53 (9), pp. 2686-2693. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.J053786 ISSN 0001-1452

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Official URL: http://dx.doi.org/10.2514/1.J053786

Abstract

To this date, there is no generally valid method to accurately predict intake starting for a certain three dimensional scramjet intake configuration. Therefore, experiments are conducted at Mach6 and 7 in a blowdown wind tunnel on a three-dimensional intake model, equipped with a movable cowl and therefore variable internal contraction. The internal contraction is slowly decreased, and the performance parameters at the interface to the combustion chamber are measured with a rake. The general trends from the Kantrowitz diagram were able to be reproduced, namely enhanced intake starting for higher freestream Mach numbers and lower internal contraction ratios. Furthermore, the effect of the angle of attack was twofold: When the intake was pitched, the leading-edge shock decreased in strength, and the intake showed improved starting characteristics. For increasing yaw angles, intake starting was hindered. Exchanging the V-shaped cowl with a straight-cowl geometry improved intake starting due to the additional mass spillage. Once the intake was started, increasing the internal contraction ratio to 2.56 did not cause the intake to unstart for all Mach numbers investigated.

Item URL in elib:https://elib.dlr.de/97938/
Document Type:Article
Additional Information:Published online 26 February 2015
Title:Experimental Investigation of the Starting Behavior of a Three-Dimensional Scramjet Intake
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Flock, Andreas K.andreas.flock (at) dlr.deUNSPECIFIED
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:53
DOI :10.2514/1.J053786
Page Range:pp. 2686-2693
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0001-1452
Status:Published
Keywords:SCRamjet, Intake, Starting, Hypersonic Airbreathing
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Systemanalyse Raumtransport
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Deposited By: Flock, Andreas
Deposited On:20 Aug 2015 09:10
Last Modified:08 Mar 2018 18:42

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