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Experimental Investigation of the Starting Behavior of a three-dimensional SCRamjet Intake with a Movable Cowl and Exchangeable Cowl Geometry at Different Mach Numbers

Flock, Andreas K and Gülhan, Ali (2014) Experimental Investigation of the Starting Behavior of a three-dimensional SCRamjet Intake with a Movable Cowl and Exchangeable Cowl Geometry at Different Mach Numbers. In: 19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference (2934), pp. 1-12. 19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 14. - 19. Jun. 2014, Atlanta, USA. DOI: 10.2514/62014-2934

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Abstract

In the current work we focused our research on the intake starting process which is crucial for proper performance of Supersonic Combustion Ramjet engines. To this date there is no generally valid method to accurately predict intake starting for a certain three-dimensional SCRamjet intake configuration. Therefore we conducted starting experiments at Mach 6 and 7 in a blow down wind tunnel on a three dimensional intake model, equipped with a movable cowl and therefore variable internal contraction. Our focus was on the influence of the cowl geometry, the free stream Mach number, the angle of attack and the ratio of total temperature in the free stream to model wall temperature on intake starting. While the influence of total temperature was minor in the temperature ranges considered, the effect of angle of attack was twofold: when the intake was pitched, that the leading edge shock decreased in strength, the intake showed improved starting characteristics. For a pitch angle in the opposite direction and for increasing yaw angles, intake starting was prevented. For a decrease in free stream Mach number from 7 to 6, the starting internal contraction ratio was delayed from 1.92 to 1.73, for the v-shaped lip configuration. Exchanging the v-shaped lip with a straight lip geometry, improved intake starting and at a constant free stream Mach number of 7, the maximum internal contraction for starting moved from 1.92 to 2.12.

Item URL in elib:https://elib.dlr.de/90382/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental Investigation of the Starting Behavior of a three-dimensional SCRamjet Intake with a Movable Cowl and Exchangeable Cowl Geometry at Different Mach Numbers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Flock, Andreas Kandreas.flock (at) dlr.deUNSPECIFIED
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/62014-2934
Page Range:pp. 1-12
Series Name:Conference Proceedings online
Status:Published
Keywords:SCRamjet, Intake, Hypersonics, Inlet, Inlet-Starting
Event Title:19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference
Event Location:Atlanta, USA
Event Type:international Conference
Event Dates:14. - 19. Jun. 2014
Organizer:AIAA
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:19 Jan 2015 16:06
Last Modified:29 Mar 2017 13:25

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