Kremena A. Increase in the space rocket launcher safety assurance system efficiency during failures accompanied by the spill of fuel components

Object - the processes and phenomena occurring as an aftermath of accidents on the launch complex, involving spill of the fuel components during the preparation and launch of; the goal - improving the security systems efficiency on launch complexes of carrier rockets in accidents that involve spill of fuel components; method - the method of the theory of heat and mass transfer, fluid dynamics, system analysis and mathematical statistics, theoretical mechanics and experimental research; the results - methods to calculate the design parameters of hydroimpulsive jets devices with controlled dispersion of droplets and barrel system for suppressing combustion of spill by dispersed flow of the process fluid at the launch complex of carrier rockets; the novelty - has been further developed combustion model of spilled propellant components, that describes total change in geometric characteristics of the spill, its rate of combustion, parameters of combustion products in the flame cone during combustion propagation. This model is confirmed by the results of experimental research on the combustion of liquid from the exposed surface, and takes into account the specifics of maintenance of carrier rockets launch complexes; combustion suppression mathematical model of spilled propellant components with polydisperse stream of process fluid flow was developed for the first time. This polydisperse stream of process fluid flow is created by the proposed technical solution, supplied from the outside, it takes into account the interaction of heat and mass transfer and hydrodynamic interaction of droplet with the the surface of the burning cone and surface. This model formalizes choice of optimal conditions for suppression of combustion with minimal use of process fluid. The first time a physical model of the liquid jet dispersion by pressure pulses (mud pulse jet) generated inside, reflecting the specific transformation stages of the jet, which allows to control dispersion of droplets by changing the parameters of sequence of hydraulic pulses that aree generated in the jet, and to determine the characteristics of the dispersed jet cone; the degree of implementation - implemented to create a security system for testing rig of fuel tank intake unit of carrier rocket "Cyclone-4" third stage; industry - space industry.