The structure of medium-scale pool fires

Abstract

This report documents a series of time-averaged gas species measurements made along the centerline of methanol, ethanol, acetone, and methane pool fires steadily burning in a quiescent environment. All gas species measurements are obtained using a Gas Chromatograph/ Mass Spectrometer System (GC/MS) for gas samples extracted at various heights above the fire and repeated at least twice at each location. Gas species volume fractions are determined via the GC/MS using predetermined calibration factors. Soot mass fractions are simultaneously measured during the gas sampling process. The gas species volume and soot mass fractions are compared at different heights within the fire and across a variety of different fuels. Other fire parameters are measured as well, including time-averaged temperature measurements and mass burning rates.

The thermal character of a 1 m methanol pool fire

“…. Ratio of the mean temperature (μ) to the standard deviation (σ) as a function of the mean temperature compared to previous results reported in 30 cm diameter methanol pool fires [4,26].…”

“…Figure 13. Ratio of the mean temperature (μ) to the standard deviation (σ) as a function of the mean temperature compared to previous results reported in 30 cm diameter methanol pool fires [4,26]. Weckman and Strong [4] measured temperature in a 30.5 cm diameter methanol pool fire with a rim height of 1 cm using a 50 µm wire diameter, bare bead, type S (Pt 10% Rh/Pt), the thermocouple is similar to the thermocouples used in this study.…”

The chemical structure of a 30 cm methanol pool fire

“…These local measurements are essential to provide insight into the complex chemical composition of this medium‐scale pool fire. These data, in conjunction with previous measurements of the mass loss, total and radiative heat feedback, calorimetry, radiative emission, and the temperature and velocity fields begin to provide a comprehensive picture of the structure of the 30 cm methanol pool fire 3‐5,7‐9 …”

“…A coverage factor of two, representing a 95% confidence interval, is applied to the combined uncertainty. A detailed description of the uncertainty analysis for the gas species measurements is described in detail elsewhere 9,10 …”

“…A detailed description of the uncertainty analysis for the gas species measurements is described in detail elsewhere. 9,10 3 | RESULTS AND DISCUSSION Figure 5 shows sequential images of the pulsing methanol pool fire.…”