Correlation between temperatures and oxygen measurements in a tunnel flow

A correlation between measured oxygen concentrations and temperature measurements in a longitudinal tunnel flow has been validated. Such a correlation was first proposed by Newman [Experimental evaluation of fire-induced stratification. Combust Flame 1984;57:33–9] for use in mine and duct fires. Such correlations can be important when trying to estimate the heat release rate in tunnel fires where a lack of oxygen readings or technical problems with instruments forces one to find alternative solutions.