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Investigation of hypersonic boundary-layer transition using high speed visualization techniques

Laurence, Stuart and Wagner, Alexander and Hannemann, Klaus (2013) Investigation of hypersonic boundary-layer transition using high speed visualization techniques. 29th International Symposium on Shock Waves (ISSW 29), 14. -19. July 2013, Madison, Wi, USA.

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Official URL: http://www.union.wisc.edu/issw29/


Transition from laminar to turbulent flow in hypersonic boundary layers leads to highly elevated levels of surface heat transfer and frictional drag. Understanding and predicting this transition process is thus critical to the design of high-speed flight vehicles. For slender two-dimensional or axisymmetric geometries above Mach 4, the dominant instability leading to transition is typically the acoustic (second-mode or Mack) instability, with most-amplified frequencies that can vary from ∼100kHz to over 1MHz. At the latter limit, typical of the hypervelocity regime, traditional sensors such as fast-response pressure transducers, heat-flux gages, or hot-wires have inadequate time response. An attractive class of alternatives are optical or visualization-based techniques, which are typically capable of higher spatial resolutions and frequency bandwidths. Additional benefits include the ability to measure away from the model surface and the non-intrusive nature of the techniques, allowing simultaneous measurements at multiple downstream locations in the the flow field. In this study, we outline the development of several such techniques for use in a shock tunnel.

Item URL in elib:https://elib.dlr.de/87034/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Paper#0246-­000233
Title:Investigation of hypersonic boundary-layer transition using high speed visualization techniques
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-6
Series Name:Confereance Proceedings
Keywords:High speed, Transition, boundary layer
Event Title:29th International Symposium on Shock Waves (ISSW 29)
Event Location:Madison, Wi, USA
Event Type:international Conference
Event Dates:14. -19. July 2013
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 - Raumfahrzeugsysteme - Anlagen u. Messtechnik (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Micknaus, Ilka
Deposited On:06 Jan 2014 09:25
Last Modified:08 May 2014 23:20

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