INVESTIGATION OF THE COMBUSTION CHARACTERISTICS OF H2-O2-N2-H2O MIXTURES UNDER ELEVATED PRESSURES AND TEMPERATURES

The flammability limits and burning velocity of hydrogen - air mixture s with diluent (nitrogen, steam) have been studied experimentally at t emperatures up to 250-degrees-C and pressures up to 4 MPa. It has been observed that the flammability limits are practically independent of pressure within 2-4 MPa. It is shown that nitrogen and steam as diluen ts have quantitatively and qualitatively different effects on the burn ing velocity of stoichiometric hydrogen - air mixtures. The effects ob served are interpreted qualitatively.