Electrical probe measurements of the gas velocity ahead of a combustion front and the burning velocity in propane/air mixtures

A simple method, which enables determination of the laminar burning velocity and the unburned gas velocity ahead of the combustion front in a closed vessel, is presented in the paper. The method is based on electrical probe and Schlieren techniques. There is a good agreement between presented data and other works for all considered equivalence ratios of propane/air mixture. The dependence of unburned gas velocity on flame radius agrees well with the data received using LDV method. The obtained results demonstrate that some difficulties may appear when combustion front of non-spherical shape is considered.