Skin-friction measurements and flow establishment within a long duct at superorbital speeds

Silvester, T. B. and Morgan, R. G. (2008) Skin-friction measurements and flow establishment within a long duct at superorbital speeds. AIAA Journal, 46 2: 527-536. doi:10.2514/1.32668

Author Silvester, T. B.
Morgan, R. G.
Title Skin-friction measurements and flow establishment within a long duct at superorbital speeds
Journal name AIAA Journal   Check publisher's open access policy
ISSN 0001-1452
Publication date 2008-02
Year available 2008
Sub-type Article (original research)
DOI 10.2514/1.32668
Open Access Status
Volume 46
Issue 2
Start page 527
End page 536
Total pages 9
Place of publication Reston, VA, United States
Publisher American Institute of Aeronautics and Astronautics, Inc.
Collection year 2008
Language eng
Subject 0913 Mechanical Engineering
970102 Expanding Knowledge in the Physical Sciences
Abstract The successful operation of an acceleration-compensated skin-friction transducer in test times and at total enthalpies offered by the X3 superorbital expansion tube was demonstrated. Localized measurements of skin friction and heat flux along the centerline or an inner wall of a 1-m-long rectangular diverging duct were reported. The laminar measurements were obtained in air with a freestream Mach number of 10 and stagnation enthalpy of 40 MJ/kg. Steady heat flux and skin-friction levels confirmed the establishment of quasi-steady flow periods of 350 As along the length of the duct. Experimental results were shown to be in excellent agreement with computational fluid dynamics estimates. The measured Reynolds analogy factor was shown to be slightly higher than theoretical flat-plate predictions and computational fluid dynamics estimates, though agreement was to within experimental uncertainty. Estimates of the gas-phase and surface Damkohler numbers suggested that although the boundary layer was likely to be chemically frozen, recombination at the surface may be occurring. The experimental data and computational fluid dynamics results for a thermochemical nonequilibrium gas and catalytic and noncatalytic walls indicated that the effects of gas-phase and surface chemical reactions were negligible.
Keyword Hypervelocity impulse facilities
Q-Index Code C1
Q-Index Status Provisional Code

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
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Created: Thu, 16 Apr 2009, 09:06:06 EST by Rose Clements on behalf of School of Mechanical and Mining Engineering