Hypervelocity skin-friction reduction by boundary-layer combustion of hydrogen

Goyne, CP, Stalker, RJ, Paull, A and Brescianini, CP (2000) Hypervelocity skin-friction reduction by boundary-layer combustion of hydrogen. Journal of Spacecraft and Rockets, 37 6: 740-746. doi:10.2514/2.3645

Author Goyne, CP
Stalker, RJ
Paull, A
Brescianini, CP
Title Hypervelocity skin-friction reduction by boundary-layer combustion of hydrogen
Journal name Journal of Spacecraft and Rockets   Check publisher's open access policy
ISSN 0022-4650
Publication date 2000-11
Sub-type Article (original research)
DOI 10.2514/2.3645
Volume 37
Issue 6
Start page 740
End page 746
Total pages 7
Place of publication Virginia, USA
Publisher AIAA
Collection year 2000
Language eng
Subject C1
290299 Aerospace Engineering not elsewhere classified
780102 Physical sciences
0901 Aerospace Engineering
Abstract Shock-tunnel measurements of Stanton number and skin-friction coefficient are reported for the injection of hydrogen through a 1.6-mm slot into a turbulent boundary layer in a l-m-long duct. The mainstream Mach number of 4.5, stagnation enthalpy of 7.8 MJ/kg, pressure of 50 kPa, and temperature of 1500 K provided a combination of flow variables that was sufficient to ensure boundary-layer combustion of the hydrogen. The experiments were also simulated by a numerical mode). The experiments and the numerical model indicated that the Stanton number was only slightly affected by boundary-layer combustion. However, the numerical simulation indicated that injection with combustion caused a reduction of approximately 50% in the skin friction coefficient, whereas the experiments yielded an even greater effect, with the reduction in skin-friction coefficient reaching 70-80% of the values of skin friction with no injection. Numerical simulation of a constant pressure flow indicated that boundary-layer combustion caused the skin-friction reduction to persist for at least 5 m downstream.
Keyword Engineering, Aerospace
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
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Created: Tue, 10 Jun 2008, 10:54:24 EST