Accession Number : AD0782559

Title :   Concentration and Mass Distribution of Charged Species in Sooting Flames.

Descriptive Note : Technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Personal Author(s) : Wersborg,B. L. ; Yeung,A. C. ; Howard,J. B.

Report Date : JUN 1974

Pagination or Media Count : 31

Abstract : Total concentration and mass distribution of charged species larger than about 300 amu were measured along the centerline of a premixed sooting acetylene/oxygen flat flame at 20 mmHg. The observed species, which include heavy hydrocarbon ions and charged soot particles, are of positive polarity. Heavy hydrocarbons appear to include both soot nuclei and surface growth intermediates. The concentrations of heavy hydrocarbon ions are much larger than the peak concentration of soot particles. Therefore ionic nucleation of soot particles is feasible for these conditions, and a tentative mechanism is described. (Modified author abstract)

Descriptors :   *Flames, *Combustion products, *Charged particles, Experimental design, Hydrocarbons, Ions, Nucleation, Particle size, Surfaces, Coagulation, Concentration(Composition)

Subject Categories : Physical Chemistry
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE