Measurement of light extinction constant of JP-8 soot in the visible and near-infrared spectrum

摘要

The dimensionless extinction constant, K{sub}e, was measured using the NIST large agglomerate optics facility (LAOF) for soot produced from JP-8 flames. Measurements were performed using light sources ranging from 632.8 to 1565 nm. These experiments represent the first measurement of dimensionless extinction constant for soot produced from JP-8 flames. The K{sub}e values did not display significant spectral variations that were observed for pure fuels such as acetylene and ethene. The measured K{sub}e values ranged from 9.75 to 9.95 in the wavelength range between 632.8 and 1565 nm. Measurements provide a more reliable value of K{sub}e for use in optical-based soot diagnostics for soot concentration and temperature measurement as well as for soot radiation analysis.