Accession Number:

ADA275644

Title:

Flames in Dusty Mixtures--Their Structure and Stability

Descriptive Note:

Contractor's rept.

Corporate Author:

INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Personal Author(s):

Report Date:

1993-11-01

Pagination or Media Count:

24.0

Abstract:

The structure and stability of flames in dusty mixtures is investigated. The presence of the dust leads to significant transport of energy by radiation and the fundamental goal of the analysis is to explore to what extent this displaces the classical non-hydrodynamical stability boundaries of the plane deflagration. An approximate description of the radiative transport permits analysis for arbitrary values of both the Planck length and the Boltzman number. It is shown that the pulsatingtraveling-wave instability usually associated with values of Lewis number Le bigger than 1 is strongly enhanced by the presence of radiation and can be present even if Le 1. On the other hand radiation tends to suppress the cellular instability normally associated with values of Le less than 1. The latter is consistent with preliminary experimental observations of Abbud-Madrid and Ronney.

Subject Categories:

  • Physical Chemistry
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE