Accession Number : AD0677254

Title :   FORMATION OF THE GAS FLOW BEFORE THE FLAME FRONT,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Salamandra,G. D.

Report Date : 14 DEC 1967

Pagination or Media Count : 10

Abstract : A study was made of the deflagration to detonation transition in hydrogen-oxygen mixtures using high-speed photography (94,000 frames/sec). Data were obtained on the gas flow in the quiescent medium before the flame front by introducing artificial optical inhomogeneities into the quiescent gas mixture, and then photographing their traces. These traces were then transformed into distance vs time diagrams. Plots of the flame speed vs time were also obtained. A comparison of the experimental data with data calculated by the method of characteristics showed that the state of the gas before the flame front can be calculated by this method. It was also shown that when the flame front moves with accelerated motion, the gas velocity, density, and pressure attain their maximums very close in front of the flame front. (Author)

Descriptors :   (*FLAMES, NOZZLE GAS FLOW), DEFLAGRATION, DETONATIONS, HYDROGEN, OXYGEN, MIXTURES, HIGH SPEED PHOTOGRAPHY, USSR

Subject Categories : Fluid Mechanics
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE