STAND FOR RESEARCH fire protective coatings

摘要

The invention relates to stands of experimental research in the art of fire and fire-retardant coatings can be used to determine the effectiveness of flame retardants. Stand for study of flame retardants comprises a gas burner, which creates a thermal flow in the direction of fire-retardant coating on the plate. The plate is fixed to the mechanism of installation and positioning. Several thermocouples located on the opposite surface of the flame retardant coating of the plate. Wherein the gas burner has a supersonic nozzle, consisting of a convergent subsonic portion at the beginning and then expanding supersonic portion. Mach number at the exit of a supersonic nozzle slice M_a= 1.05 ... 1.10. supersonic nozzle axis coincides with the axis of symmetry of the plate. The technical result - providing constancy of flow and exhaust velocity of the combustible mixture from the gas burner. 2 yl.