High pressure laminar burning velocity measurements and modelling of methane and n-butane

A constant volume vessel has been used in conjunction with a numerical multi-zone model to calculate laminar burning velocities of methane and n-butane in the ranges phi = 0.8-1.4, Tu = 320-470 K, pu = 1-15 bar from the pressure record. This multi-zone model has been compared with the analytical model of Luijten and de Goey. For methane, the experimental data have been compared with modelling data generated using the MIXFLA program of Warnatz. The MIXFLA data have further been used to examine the form of the correlation fitted to the experimental data, confirming the form used by Clarke. For methane, good agreement was found between the current experimental data and the literature at high pressures. For n-butane, poor agreement was found with the one data set available. However, the data from this reference did not compare well with other authors for methane.