Influence of temperature on combustion and detonation limits for propane-butane-air mixtures. Experimental results

The pressures and pulses are significantly different in different flame propagation regimes of the hydrocarbon-air mixtures. Therefore, to predict the real picture of accident development in fuel concentrated objects, it is necessary to know the boundaries of the existence of each regime as accurately as possible. The combustion of mixtures of the most common alternative motor fuel (AMF), the liquefied petroleum gas (LPG) with air, is considered in this paper. The results of experiments in a detonation tube with obstacles, which model the obstructed space, are presented too. The temperature influence on the burning velocity and concentration limits of various flame propagation regimes is demonstrated. The results presented in this paper can be used in the development and verification of computer codes to analyze possible accident situations.