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Experimental investigation of a hypersonic inlet with and without sidewall compression

Gruhn, Patrick and Gülhan, Ali (2011) Experimental investigation of a hypersonic inlet with and without sidewall compression. Journal of Propulsion and Power, 27 (3), pp. 718-729. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.50347. ISSN 0748-4658.

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Official URL: http://arc.aiaa.org/doi/pdf/10.2514/1.50347


The inlet of a Mach 8 cruise vehicle has been experimentally investigated in a hypersonic blow down wind tunnel with test times of up to 30s. Two test series have been carried out, the first one with a two-dimensional inlet configuration and the second one with the inlet featuring additional side-wall compression. The objective of the tests was to determine the performance of the inlet at on- and off-design conditions, i.e. at angle of attack and angle of yaw. Additionally, the starting behavior of the inlet has been determined, i.e. the contraction ratio at which the inlet starts. Results were interpreted from schlieren visualizations, IR thermography, static and Pitot pressure readings and mass flow measurements. The off-design investigation of both inlet configurations revealed the sensitivity of the inlet towards a cowl shock induced separation on the second compression ramp. If the cowl shock was not ensured to fall into the bleed duct behind the second ramp, no inlet flow could be established. The comparison of starting contraction ratios showed the advantage of the inlet with side-wall compression, i.e. the inlet with sidewall compression starts at higher contraction ratios.

Item URL in elib:https://elib.dlr.de/70187/
Document Type:Article
Additional Information:May–June 2011
Title:Experimental investigation of a hypersonic inlet with and without sidewall compression
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gruhn, Patrickpatrick.gruhn (at) dlr.deUNSPECIFIED
Gülhan, Aliali.guelhan (at) dlr.deUNSPECIFIED
Journal or Publication Title:Journal of Propulsion and Power
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.50347
Page Range:pp. 718-729
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:Scramjet, Hypersonic Propulsion, Inlet, LAPCAT
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Gruhn, Patrick
Deposited On:27 Jun 2011 08:46
Last Modified:08 Mar 2018 18:44

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