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Experimental Characterization of Three-Dimensional Scramjet Inlet with Variable Internal Contraction

Hohn, Oliver and Gülhan, Ali (2021) Experimental Characterization of Three-Dimensional Scramjet Inlet with Variable Internal Contraction. Journal of Propulsion and Power, 38 (1), pp. 71-83. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.B38315. ISSN 0748-4658.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://arc.aiaa.org/doi/full/10.2514/1.B38315


A compact three-dimensional scramjet intake with a high compression ratio and a movable cowl as a starting device and for the adaption of the internal contraction to respective operating conditions was designed for a parabolic reentry flight experiment. In an extensive measurement campaign, conducted in a blowdown wind tunnel at Mach 7, the operational behavior of this inlet was characterized. The parameters investigated include internal contraction ratio, Reynolds number, angle of attack, and angle of yaw, and the starting behavior was examined. Static and total pressure ratios and mass capture ratios were used to evaluate the performance of the inlet and throttle curves to determine the operational limits. The flowfield was studied by schlieren images, wall pressure distributions, and Mach number profiles in the interface of the isolator and combustion chamber, which were determined with a pressure measurement rake with static and pitot pressure probes. The flow on the external ramp was analyzed by infrared thermography. The inlet showed good performance regarding compression and efficiency and proved to be quite robust at various flight angles. The performance tended to improve, and the inlet operated more stably with increasing internal contraction, with the most important factor being whether the inlet leading-edge shock was captured by the cowl.

Item URL in elib:https://elib.dlr.de/144891/
Document Type:Article
Title:Experimental Characterization of Three-Dimensional Scramjet Inlet with Variable Internal Contraction
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hohn, OliverUNSPECIFIEDhttps://orcid.org/0000-0002-4225-7352UNSPECIFIED
Gülhan, AliUNSPECIFIEDhttps://orcid.org/0000-0003-4905-5881UNSPECIFIED
Date:28 September 2021
Journal or Publication Title:Journal of Propulsion and Power
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 71-83
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:Scramjet Intake Inlet Hypersonic flow Airbreathing propulsion
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Reusable Space Systems and Propulsion Technology, R - Systems Analysis Space Transport (SART), R - XTRAS - EXperTiese RAumtranSport
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Hohn, Oliver
Deposited On:09 Dec 2021 14:03
Last Modified:12 Jan 2022 10:28

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