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Experimental and Numerical Performance Analysis of a Self-Starting Three-Dimensional Scramjet Intake

Flock, Andreas K. and Gülhan, Ali (2017) Experimental and Numerical Performance Analysis of a Self-Starting Three-Dimensional Scramjet Intake. Journal of Propulsion and Power. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.B36602 ISSN 0748-4658

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Official URL: https://arc.aiaa.org/doi/10.2514/1.B36602

Abstract

In this work, a three-dimensional intake model was investigated in a blowdown wind tunnel and results were compared and complemented with Reynolds-averaged Navier–Stokes simulations. The intake model was equipped with a movable cowl with which the internal contraction ratio was set to the self-starting limit. Three different conditions were investigated: first, a v-shaped cowl geometry at a freestream Mach number of seven; second, a straight cowl geometry at a freestream Mach number of seven; and, finally, a v-shaped cowl geometry at a freestream Mach number of six. Furthermore, a one-dimensional postanalysis was performed to calculate overall engine parameters from stream-thrust-averaged intake performance parameters. Numerical results were within the experimental uncertainty, except for small displacements near separation regions. The mass capture ratio of the v-shaped cowl was slightly higher as compared to the straight cowl. When increasing the Mach number from six to seven, the specific impulse dropped from 2561 to 2100 s, respectively. For the Mach 7 configurations, a Maximum sustainable backpressure ratio of approximately 115 was measured. For the Mach 6 case, the maximum sustainable static backpressure ratio dropped to about 85. The maximum sustainable backpressure to operating backpressure ratio was around 4:1, and it was independent of the Mach number.

Item URL in elib:https://elib.dlr.de/113599/
Document Type:Article
Title:Experimental and Numerical Performance Analysis of a Self-Starting 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:2017
Journal or Publication Title:Journal of Propulsion and Power
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.2514/1.B36602
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0748-4658
Status:Published
Keywords:Intake Starting, CFD Analysis, Airbreathing Propulsion, Wind Tunnel Experiments
HGF - Research field:Energy
HGF - Program:other
HGF - Program Themes:E - no assignment
DLR - Research area:Energy
DLR - Program:E - no assignment
DLR - Research theme (Project):E - no assignment
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Deposited By: Flock, Andreas
Deposited On:23 Aug 2017 09:57
Last Modified:07 Jun 2019 08:59

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