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Investigation of a two dimensional Scramjet Inlet Flow Field at Mach 7

Häberle, Jürgen and Gülhan, Ali (2007) Investigation of a two dimensional Scramjet Inlet Flow Field at Mach 7. Journal of Propulsion and Power. AIAA.

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Official URL: http://www.AIAA.org


measurement campaign has been carried out to investigate the viscous flow effects in a fixed geometry two dimensional (2D) Scramjet inlet at Mach 7. The tests have been performed in a hypersonic blow down wind tunnel facility. The existing boundary layer separation due to shock interaction in the inlet throat can lead to inlet un-start. Therefore a optional passive boundary layer bleed has been integrated at the throat. The passive bleed reduces the lip shock induced separation bubble in the throat significantly. The obtained experimental wall pressure distribution and Pitot pressure profiles are discussed and compared to 2D and 3D CFD calculations. To investigate the compression behavior, different back pressure ratios have been applied to the isolator flow and the effects on the internal flow structure are analyzed by means of Shadowgraph pictures, static pressure distribution and Pitot pressure profiles at the exit of the isolator. The heat transfer coefficient to the inner side wall of the isolator is calculated using the time dependent surface temperature, measured with an infrared system. The resulting 2D Stanton number distributions are presented for different configurations and different back pressure ratios. In addition three different Reynolds numbers have been used to investigate the effect on the separation bubble located in the corner of the first and second ramp transition and the resulting change in ramp heat flux.

Item URL in elib:https://elib.dlr.de/52419/
Document Type:Article
Title:Investigation of a two dimensional Scramjet Inlet Flow Field at Mach 7
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
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
Keywords:Scramjet, heat transfer, internal flowfield, inlet, isolator, boundary layer bleed, Stanton number
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Grundlagen Raumtransport - Anlagen und Messtechnik (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited On:15 Jan 2008
Last Modified:27 Apr 2009 14:35

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