Nalysko M. Development of scientific principles of safety increasing in extended buildings in propagation of air shock waves

The thesis is devoted to solve an actual scientific problem of improvement of the methods of parameters estimation for gasdynamics and prediction of crash gas explosion in propagation of air shock wave in extended buildings and improvement of the decrease of its intensity. The modification of numerical method for large particles is elaborated in order to perform gasdynamic calculations for parameters of propagation of air shock waves in channels taking into account the process of deflagration and detonation combustion. The implementation of the modification as the mathematical model of the shock tube allows to obtain the parameters of explosive load as a complex shock-wave field of the load of building structure. A new model of gas-phase burning of hydrocarbons in the mode of detonation and deflagration on the base of simultaneous numeric solution for the problem of both gasdynamics and chemical kinetics is elaborated. The regularities of gas-air mixture ignition with heat source and air shock wave are determined. New principles for controlling the propagation of air shock waves in extended buildings with the use of breakwave chambers and protection channels are substantiated. Method of intensity decrease for air shock waves and its transformation into compression wave at the expense of increasing the shock wave drag of the extended channel is offered.