SOOT PROPERTY MEASUREMENTS IN A TWO-METER DIAMETER JP-8 POOL FIRE

An in situ adsorption/emission diagnostic was used to measure soot properties in 2 m diameter JP-8 pool fires. Twelve tests were performed at the Lurance Canyon Burn Site operated by Sandia in Albuquerque, New Mexico. Seven of the tests were conducted with the probe positioned close to the centerline at heights above the pool surface ranging from 0.5 m to 2.0 m in 0.25 m increments. For the remaining five tests, the probe was positioned at two heights 0.3 m from the centerline and at three heights 0.5 m from the centerline. Soot concentration was determined using a soot absorption measurement based on the transmission of a solid-state red laser (635 nm) through the 3.7 cm long probe volume. Soot temperature and a second estimate of soot concentration were measured using two-color optical pyrometry at 850 nm and 1000 nm. The effective data rate for these measurements was 10 kHz. The results presented include the statistics, probability density functions, and spectral density functions of soot concentration and soot temperatures at the different measurement locations throughout the fire.