Experimental study of a two-phase flow generated by spraying water in the air with an injector.- Analysis of the results of the experiment, conclusions about the features of the hydrodynamics of a two-phase flow produced by spraying a liquid with an injector.- The crisis of droplet resistance in the turbulent two-phase flow of the spraying torch of a mechanical injector with transient Reynolds numbers.- Experimental confirmation of the early crisis of resistance on a single ball.- Influence of the geometry and turbulence of the gas flow on the hydrodynamic resistance of a streamlined body.- Calculation of the resistance and heat transfer of a ball to a flowing gas in a cylindrical channel.- Calculation of the resistance and heat transfer of a ball in laminar and strongly turbulent gas flows.- Simulation and calculation of a two-phase flow produced by the liquid spray nozzle taking into account the droplets resistance crisis.- Simulation and calculation of the heat transfer in a two-phase flow produced by the liquid spray nozzle.