Flame Radiation, Structure, and Scalar Properties in Microgravity Laminar Fires (Paperback) (ISBN-13: 9781289231194)

Results from microgravity combustion experiments conducted in the Zero Gravity Research Facility (ZGF) 5.18 second drop facility are reported. The results quantify flame radiation, structure, and scalar properties during the early phase of a microgravity fire. Emission mid-infrared spectroscopy measurements have been completed to quantitatively determine the flame temperature, water and carbon dioxide vapor concentrations, radiative emissive power, and soot concentrations in microgravity laminar methane/air, ethylene/nitrogen/air and ethylene/air jet flames. The measured peak mole fractions for water vapor and carbon dioxide are found to be in agreement with state relationship predictions for hydrocarbon/air combustion. The ethylene/air laminar flame conditions are similar to previously reported results including those from the flight project, Laminar Soot Processes (LSP). Soot concentrations and gas temperatures are in reasonable agreement with similar results available in the literature. However, soot concentrations and flame structure dramatically change in long-duration microgravity laminar diffusion flames as demonstrated in this report.

Author: Nasa Technical Reports Server (Ntrs),Douglas Feikema
ISBN-10: 1289231192
ISBN-13: 9781289231194
Publisher: Bibliogov
Language: English
Published: 07/22/2013
Pages: 26
Format: Paperback
Weight: 0.15lbs
Size: 9.69h x 7.44w x 0.05d