Accession Number : AD0644006

Title :   INVESTIGATION OF PLASMA IN LAMINAR AND TURBULENT HYDROCARBON FLAMES,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Sokolik,A. S. ; Semenov,E. S.

Report Date : 30 JUN 1966

Pagination or Media Count : 23

Abstract : The ionization of hydrocarbon-air flames was studied under conditions of moving spherical flames in a closed vessel (bomb) by means of a one-electrode probe and an oscilloscope. The ion-generating reaction: CH + O to CH(+) + e(-) in hydrocarbon flames occurs due to transfer of OH radicals and O or H atoms in the reaction zone, followed by reaction H + O2 to OH + H. The part played by diffusion within the reaction zone obtains confirmation in measurements of ionization in turbulent flames, in the fact that velocity pulses are followed by pulses of ionization current, and also in that the maximum ionization current amplitudes in turbulent flames increase with the turbulence intensity, and are considerably higher than those for laminar flames in the same mixtures. Analysis of data on ionization in a detonation wave of hydrocarbon-oxygen flames results in two alternative concepts of the mechanism of ignition in a detonation wave. (Author)

Descriptors :   (*FLAMES, *PLASMAS(PHYSICS)), (*HYDROCARBONS, FLAMES), GAS IONIZATION, RECOMBINATION REACTIONS, DIFFUSION, LAMINAR FLOW, TURBULENCE, FLAME PROPAGATION, IGNITION, DETONATION WAVES, PROPANE, METHANE, COMBUSTION, USSR

Subject Categories : Plasma Physics and Magnetohydrodynamics
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE