Duration of Periods of Temperature Decreasing in the Wake of a Time-Discrete Flow of Water Droplets Moving through High-Temperature Gases

Abstract: Experimentally obtained ranges of decreasing of temperature ofcombustion products after pulsed injection of an aerosol consisting offine water droplets and time intervals with reduced (as compared to theinitial) temperature of gases are presented. Fast-response thermocouplesand panoramic optical methods of tracer visualization are applied. Toensure the possibility of using the experimental results in a largegroup of gas-vapor-droplet applications, the experiments are performedwith variations of the basic parameters of the examined process of wateraerosol mixing with the opposing flow of heated gases: initialtemperature and velocity of the gas flow, droplet size, initialtemperature and velocity of water aerosol injection, number and durationof pulsed injection events. The results are generalized to be used ingas-vapor-droplet technologies of fire fighting and high-temperaturewater purification based on evaporation of various impurities.