Dissertation/Thesis Abstract

Smoke points of microgravity and normal gravity coflow diffusion flames
by Dotson, Keenan Thomas, M.S., University of Maryland, College Park, 2009, 92; 1474308
Abstract (Summary)

Smoke points were measured in microgravity aboard the International Space Station (ISS) as part of the Smoke Points in Coflow Experiment (SPICE), and in normal gravity conditions. In microgravity conditions increasing the coflow velocity or decreasing the burner diameter increased the smoke point flame length. A simplified prediction of centerline jet velocity did not yield residence-time-based criticalities or data collapse. Simulation of non-reacting flows showed that the simplified centerline velocity prediction was able to predict velocity decay for only relatively weak coflows. An improved model may yield different results. In normal earth gravity coflow velocity exhibited mixed effects. For burner diameters of 0.41, 0.76, and 1.6 mm, smoke points increased with increases of coflow velocity. For an unconfined coflow burner with a burner diameter of 13.7 mm smoke point length decreased with increasing coflow velocity for ethylene and propylene, while increasing for propane flames.

Indexing (document details)
Advisor: Sunderland, Peter B.
Commitee: Marshall, Andre W., Quintiere, James G., Sunderland, Peter B.
School: University of Maryland, College Park
Department: Fire Protection Engineering
School Location: United States -- Maryland
Source: MAI 48/04M, Masters Abstracts International
Subjects: Engineering, Aerospace engineering, Mechanical engineering
Keywords: Coflow, Diffusion, Flame, Microgravity, Smoke, Soot
Publication Number: 1474308
ISBN: 9781109634273
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