Momentum Diffusion Flame Characteristics and the Effects of Water Spray

摘要: For water spray suppression of gas well blow-out fire applications, reasonably large scale (7 MW) subsonic methane diffusion flames have been investigated near the Froude number limit. Characteristics this limit include constant flame height, increasing lift-off and decreasing radiative fraction. Flame blow-off has observed with pipe sizes up to 30 mm diameter. heights, centerline temperatures, incident flux nearby targets measured without suppressant. Using a simple participating cylindrical model an effective gray absorption coefficient approaching 0.2 m−1 was determined at Away from limit, rises rapidly as does temperature decrease jet velocity, i.e., luminosity increases goes down. The derived shape functional dependence fraction in is consistent small liter...