A possible radiative model for micronic carbonaceous particle sizing based on time-resolved laser-induced incandescence

Allouis C. G., Rosano F., Beretta F., D'Alessio A.

MEASUREMENT SCIENCE AND TECHNOLOGY, vol.13, no.3, pp.401-410, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 3
  • Publication Date: 2002
  • Doi Number: 10.1088/0957-0233/13/3/323
  • Journal Name: MEASUREMENT SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.401-410
  • Middle East Technical University Affiliated: No

Abstract

A numerical model of time-resolved laser-induced incandescence (TIRE-LII) for different kinds of large carbonaceous particle is developed in this paper. Theoretical temporal LII signals were computed for the following classes of particles: soot, the well known hollow particles called cenospheres (tens of microns) and full carbonaceous particles called by analogy pleospheres (a few microns), pleo- from the Greek pleos (solid). The large carbonaceous particles have a characteristic time for internal gradient dissipation much longer than soot, thus a temperature profile establishes inside them. On the basis of these observations, a spatial time-dependent model for cenospheres and pleospheres was considered, i.e. a system of partial differential equations based on mass and energy balances.