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Force and Heat Transfer Measurements in Hypersonic Free-Jet Flow

Legge, H. (1994) Force and Heat Transfer Measurements in Hypersonic Free-Jet Flow. In: 18th AIAA Aerospace Ground Testing Conference, 20.-23. Juni 1994, Colorado Springs, CO/USA.

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Abstract

The technique for aerothermodynamic measurements in free-jets is considered in the transition regime between continuum and free molecular flow. The determination of the drag and lift by electromagnetic sting balances, the determination of the total heat transfer on small models (l&#615 mm), and the determination of the overall recovery temperature is described. The advantages of a free-jet against a nozzle flow and especially the shortcomings are discussed. These are in particular: flow gradients, freezing effects of the translational degree of freedom and background pressure influences. As an extension of the free-jet technique a system under development isdescribed in which the core of a free-jets is extracted by a skimmer which works in continuum flow. It is possible to produce a shockless free-jet core up to large distances by this device.

Document Type:Conference or Workshop Item (Paper)
Additional Information: institution=AIAA, LIDO-Berichtsjahr=1994, pages=9,
Title:Force and Heat Transfer Measurements in Hypersonic Free-Jet Flow
Authors:
AuthorsInstitution or Email of Authors
Legge, H.UNSPECIFIED
Date:1994
Journal or Publication Title:18th AIAA Aerospace Ground Testing Conference, 20.-23. Juni 1994, Colorado Springs, CO/USA
Series Name:AIAA 94-2633
Status:Published
Keywords:Rarefied flow, free-jets, force mesurements heat transfer measurements, recovery temperature measurements
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:UNSPECIFIED
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:08

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