FLAME JET IGNITION OF LARGE FUEL-AIR CLOUDS

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Authors
  1. Mackay, D.J.
  2. Murray, S.B.
  3. Moen, I.O.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN)
Abstract
The results of a series of large scale flame acceleration and transition to detonation experiments are presented. The experimental apparatus consisted of a 0.9 m diameter steel tube connected to a large cylindrical plastic bag, simulating an unconfined region. The entire test volume was filled with a uniform fuel-air mixture. Four fuels were used: acetylene, ethylene, propane, and vinyl chloride monomer. The mixture was ignited at the far end of the tube, the flame propagated down the length of the tube and subsequently jetted into the unconfined. The resultant combustion in the unconfined region was filmed with high speed cameras. The nature of the flame jet was controlled by an array of obstacles in the tube and, in many of the tests, by a central circular blockage, partially obstructing the exit plane of the tube. Transition to detonation in the bag was observed in acetylene-air with a flame jet emerging from an open tube exit. TRUNCATED
Report Number
DRES-M-1274 — Memorandum
Date of publication
15 Jun 1990
Number of Pages
47
DSTKIM No
90-03858
CANDIS No
66101
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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