Statistics – Applications
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..504..408c&link_type=abstract
SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM - 2000. AIP Conference Proceedings, Volume 504, pp. 408-415 (2000).
Statistics
Applications
Spaceborne And Space Research Instruments, Apparatus, And Components
Scientific paper
Slow reaction, cool flames and autoignition are discussed in the context of unstirred, static reactors at terrestrial (1g) and microgravity (μg) environments. At 1g, conductive heat transport is important when the Rayleigh number (Ra) is less than 600, conduction and convection are important when the Ra ranges from 600 to approximately 104 and convection governs when Ra exceeds 104. Except for highly-diluted, weakly exothermic reactions, the Ra for all laboratory-scale, lg experiments ranges from 103-105. Hence, convection and conduction are important at 1g. Existing models, however, neglect convection, in lieu of conduction, to simplify mathematical formulation. While this assumption is not valid for most 1g cool flames and autoignitions, it is valid at μg where Ra numbers on the order of 10-100 are easily attained in drop towers and aircraft. Aboard the Space Shuttle and Station, typical Ra's are order 1/10-1. .
Chapek Richard
Hehemann David
Neville Donna
Pearlman Howard
Sheredy William
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