Performance of a Generic 4-Step Global Reaction Mechanism With Equilibrium Effects for Detonation Applications

A reduced 4-species, 4-step Global Reaction Mechanism (GRM) [1], derived from detailed chemistry using a thermochemical approach, is investigated for three different reactive mixtures. The trade-off between preciseness of Elementary Reaction Mechanisms (ERMs), and low computational overhead requirements of GRMs remains a dilemma in the application of chemical kinetic models to detonation problems. Reducing a reaction mechanism often compromises the chemical details, and reduces the scope of applicability of the derived model. This is largely due to the mixture chemistry having a vital influence on several key aspects of the detonation phenomenon like initiation, quenching, and the dynamics of the wave front and hydrodynamic structure during propagation. For detonation problems in particular, there has been an insufficient replication of the complex reality of the phenomenon through numerical simulations which has lead to a constant demand for more accurate and affordable models. Three separate stoichiometric combustion mixtures are investigated, each involving acetylene, methane, or propane mixed with oxygen. Each mixture exhibits very different global activation energies, heat release, and ignition characteristics.

Air-petrol burners use for solid stone mining and processing

The development stages of thermo-jet burners with the intensifiers of fuel component combustion are described. Investigations for obtaining a detonation phenomenon in a free jet of burners at fuel component combustion are shown. The design peculiarities in developments of air-petrol thermo-tools allowing the intensification of the processes of fuel component combustion are shown.