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Проведено комплексное численное моделирование внутрикамерных процессов, протекающих при выходе на расчётный режим работы ракетного двигателя твёрдого топлива. Рассматривается сопряжённая задача, включающая в себя: -нестационарное срабатывание воспламенительного устройства; -прогрев, воспламенение и последующее нестационарное горение заряда твёрдого топлива; -нестационарное трёхфазное гомогенно-гетерогенное течение продуктов сгорания в камере сгорания, сопле и за сопловым блоком ракетного двигателя; -разгерметизацию двигателя и вылет заглушки соплового блока. Приводятся результаты расчётов. Complex numerical modeling of the intrachamber processes, proceeding at the output settlement mode of operation of a solid propellant rocket engine, is carried out. We consider the coupled problem, which involves nonstationary operation of an ignition device; warming up, ignition and subsequent non-stationary burning of a propellant grain; non-stationary three-phase homogeneous-heterogeneous flow of the products of combustion in the combustion chamber, in the nozzle and behind the nozzle of the rocket engine; depressurization and moving of the nozzle block membrane. The results of modeling are given.

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The article presents the results of the analysis of existing designs of non-coaxial planetary gearboxes, their advantages and disadvantages. The invention is related to transport machinery area, transmission of transport vehicles, land transport systems, including motor vehicles, tractor-trailers, construction and road machines, tractors and ground-based equipment for special purposes. The design and kinematic scheme of a non-coaxial multiple-speed shaft-planetary gearbox, type 24R10, are presented. The work describes the operation of a non-coaxial multiple-speed shaft-planetary gearbox, type 24R10 (24 direct gears and 10 reverse gears), as well as gear ratios for each gear. A technical and economic assessment of the non-coaxial multiple-speed shaft-planetary gearbox, such as 24R10, is given. It is shown that the task is solved by compacting the layout of the multiple-speed gearbox and the planetary mechanism both in gear and summing modes, as the torque enters two links and is removed from the third one. The research proves that the design of a non-coaxial multiple-speed shaft-planetary gearbox, type 24R10, provides an improvement in the layout and operational characteristics of the gearbox and, accordingly, the operational capabilities of the vehicle.

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