Experimental measurements have been made to determine the detonation induction distances in hydrogen-nitric oxide mixtures and in hydrogen-oxygen-diluent mixtures in a 50-mm diameter tube for various diluent concentrations at initial pressures of 1 and 5 atmospheres and an initial temperature of 40°C. Detonation could not be obtained in the 12-foot long tube with any of the hydrogen-nitric oxide mixtures used at initial pressures of 1, 5, or 10 atmospheres. Nitrogen, helium, argon, and carbon dioxide were the individual diluents which were added to a stoichiometric mixture of hydrogen and oxygen. Addition of any of the diluents caused an increase in the detonation induction distance by varying amounts. For a given volume of diluent, carbon dioxide caused the greatest increase in induction distance while the addition of argon resulted in the least increase.
展开▼
