Characterization of physical, thermal and chemical contributions of sodium bicarbonate particles in extinguishing counterflow nonpremixed flames

Conference · Thu Jul 01 04:00:00 EDT 1999

OSTI ID:20019088

Chelliah, H K; Krauss, R H; Zhou, H; Lentati, A M

Based on laminar, nonpremixed methane-air flames established in a counterflow field, the flame extinction effectiveness of sodium bicarbonate particles is investigated here, both experimentally and numerically. In experiments, particles are separated into varying sizes (with the range of each size group approximately 10 {micro}m), and are introduced with the air stream. Flame extinction strain rates estimated using the measured nozzle exit velocities and separation distance are reported, as well as limited comparisons with LDV data (latter are mainly for calibration of the system). Numerical flame extinction results are also reported using a hybrid Eulerian-Lagrangian model previously developed for characterization of the flame extinction mechanism of fine-water droplets in a counterflow field. Comparison of the experimental and numerical results indicates a similar trend with particular size variation, but uncertainties in the particle decomposition model employed precludes any absolute comparisons at this time.

• Research Organization: Univ. of Virginia, Charlottesville, VA (US)
• OSTI ID: 20019088
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
ACID CARBONATES
CHEMICAL PROPERTIES
FIRE EXTINGUISHERS
FLAMES
INHIBITION
METHANE
PARTICULATES
PERFORMANCE TESTING
PHYSICAL PROPERTIES
SODIUM COMPOUNDS
THERMODYNAMIC PROPERTIES