Pressure rise in a closed container during the combustion of a localized gas volume

Pressure rise generated by the expansion of a local gas volume in a closed vessel

“…The data do not exhibit any significant variation in the final pressure with the different inert gases tested and agree with the model predictions. Vykhristyuk et al (1988) reported local combustion data for methane-air systems, which may be used to assess the present model and other local combustion models reported in the literature. Tests were conducted by igniting either a stoichiometric or fuel-lean (Ø = 0.828) methane-air mixture contained within a thin rubber balloon, which was placed at the centre of a large rigid 3.2 m diameter cylindrical vessel (33.8 m 3 ) filled with air.…”

“…The data reported by Vykhristyuk et al (1988) was used to assess various local combustion models. Equation (3.6) from the present model was used to predict the final gas pressure for both the stoichiometric and fuel-lean methaneair mixtures.…”

“…These include results from the original model of Babkin et al (1985) (eqn (1) in Vykhristyuk et al 1988) and the approximation proposed by Vykhristyuk et al (eqn (2) in Vykhristyuk et al 1988), which neglects the effects of unequal specific heats between the driver and driven gases. The second approximation given by Vykhristyuk et al (eqn (3) in Vykhristyuk et al 1988), which is shown in figure 5, is not included in figure 6 since that form of the equation is limited to small combustible gas volume fractions. Both forms of the model generally agree with the data, except at combustible gas volume fractions above approximately 82 per cent, in which the predicted final pressure exceeds the AICC pressure.…”

“…Although a number of analytical models have been developed, data to assess the models are limited. Vykhristyuk et al (1988) performed local combustion experiments and summarized both partial combustion and local combustion data from earlier reports with limited distribution. The local combustion experiments performed by Vykhristyuk et al involved igniting different sized rubber balloons filled with either a stoichiometric or fuel-lean (equivalence ratio equal to 0.83) methane-air mixture contained within a sealed test chamber filled with air.…”

“…The ratio of specific heats of the compressed gas influences the final pressure to a lesser extent. The local combustion data reported by Vykhristyuk et al (1988) are limited to a combustible gas volume fraction of less than 10 per cent. That is, the volume of the combustible mixture tested is less than 10 per cent of the total volume.…”