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Some Observations on Near-limit Flames.

Authors
Furno-AL; Cook-EB; Kuchta-JM; Burgess-DS
Source
13th Int'l Symp on Comb 8/23-29/70 Univ of Utah Salt Lake City Utah PP 593-599 :593-599
Link
NIOSHTIC No.
10010195
Abstract
Lean mixtures of hydrogen-air and rich mixtures of n-butane-air were spark ignited within a 12-ft-diam sphere. At hydrogen concentrations below 8.0 percent, and at butane concentrations above 6.1 percent, the pressure rises were very small since little of the combustible mixture was consumed by upward flame propagation. With the onset of downward propagation of 8.5 percent hydrogen or 6.0 percent butane, combustion was complete. The limits of downward flame propagation are compared with available data on the detonable limits of gas mixtures when initiated by solid explosives. The interpretation follows spalding's treatment of the optimum gas concentrations for spark ignition, using the concept of preferential diffusion.
Publication Date
19710101
Document Type
OP;
Fiscal Year
1971
NTIS Accession No.
NTIS Price
Identifying No.
OP 136-71
NIOSH Division
PRC;
Source Name
13th Int'l. Symp. on Comb., 8/23-29/70, Univ. of Utah, Salt Lake City, Utah, PP. 593-599
State
UT;
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