Fundamental Flashback, Blowoff, and Yellow-Tip Limits of Fuel Gas-Air Mixtures

摘要

Fundamental flashback and blowoff characteristics were determined, it is believed, for all fuel-gas mixtures in which the gas industry may be interested. These are critical boundary velocity gradients for flames in free air, on burners with ports at room temperature and pressure. Burner aeration is characterized by the parameter, fraction of stoichiometric. Fundamental yellow-tipping characteristics of fuel gases were discovered and measured for burners in free air, with ports at room temperature and pressure. The influence of different port shapes, depths, and temperatures on the basic flashback, blowoff, and yellow-tip characteristics of fuel gases has been studied to establish the fundamental relationships and to provide needed data for some fuels. Also a method of predicting exchangeability of fuel gases was developed. (Author)