Soot properties and species measurements in a two-meter diameter JP-8 pool fire.

Shaddix, Christopher R. ; Murphy, Jeffrey J.

Sandia National Laboratories

关键词: Water Vapor;    Absorption Spectroscopy;    37 Inorganic, Organic, Physical And Analytical Chemistry;    Fires;    Jet Engine Fuels;   

DOI  :  10.2172/918396
RP-ID  :  SAND2003-8246
RP-ID  :  AC04-94AL85000
RP-ID  :  918396

美国|英语

来源: UNT Digital Library

【 摘 要 】

A tunable diode laser absorption spectroscopy probe was used to measure in situ soot properties and species concentrations in two-meter diameter JP-8 pool fires. Twelve tests were performed at the Lurance Canyon Bum 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 mm 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 la00 nm. The effective data rate for these measurements was 10 Mz. Finally, tunable diode laser absorption spectroscopy was used to qualitatively estimate water concentration at a rate of 1 kHz. To improve signal-to-noise, these data were averaged to an effective rate of 2 Hz. The results presented include the statistics, probability density functions, and spectral density functions of soot concentration, soot temperature, and approximate water concentrations at the different measurement locations throughout the fire.