NUMERICAL MODELING OF A FLAME SURFACE IN THE CLOSED CHAMBER

Assad M.S., Institute of Heat and Mass Transfer named after A.V. Lykov, National Academy of Sciences of Belarus, Minsk, the Republic of Belarus

Mironov V.N., Institute of Heat and Mass Transfer named after A.V. Lykov, National Academy of Sciences of Belarus, Minsk, the Republic of Belarus

Penyazkov O.G., Institute of Heat and Mass Transfer named after A.V. Lykov, National Academy of Sciences of Belarus, Minsk, the Republic of Belarus

The method for modeling of the flame surface in a closed cylindrical bomb is developed assuming preserving the spherical flame front at interactions with confined walls. Calculations are performed for ignition point located at the side and axial wall.
General expressions for flame surface taking into account the changing of flame shape and geometry of the bomb are deduced mathematically. Dependencies of the flame surface on time and flame radius are obtained. These expressions allow studying dynamic of heat release during combustion process.

Flame surface, cylindrical bomb, flame radius

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LOCALIZED FORMS OF PARAMETRIC VIBRATIONS OF A CYLINDRICAL SHELL LAYING ON A NON-HOMOGENEOUS ELASTIC FOUNDATION

Mihasev G.I., Vitebsk State University, Vitebsk, Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

The problem on the parametric vibrations of a thin, long cylindrical shell lying on an elastic foundation under action of compressive static axial forces and pulsing pressure is considered. Under an assumption that a thickness and physical characteristics of the shell as well as a foundation factor of an elastic basis are functions of a longitudinal coordinate, solutions of the Flugge type equations are constructed in the form of functions decaying far from some parallel on the shell surface.

Parametric vibrations, cylindrical shell, elastic foundation, static axial forces

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DYNAMIC MODELING OF INNER PROCESSES IN PISTON (AXIAL) PUMP WITH FLUID FLOW REGULATION

Zhilevich M.I., Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, the Republic of Belarus

Shevchenko V.S., Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, the Republic of Belarus

The model mathematics for estimation design parameters of piston (axial) pump with servosystem is proposed. The possibility of estimation influence parameters of pump and servosystem on dynamic features oft hydraulic drive.

Piston pump, servosystem, dynamic features

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ON THE MOVEMENT OF A RIGID BODY WITH A RING SUPPORT AREA ALONG A ROUGH PLANE

Argatov I.I., Institute of Problems of Mechanical Engineering, St. Petersburg, Russia

Equations of plane-parallel sliding of a rigid body with the ring support under dry friction are derived. For the time of braking of a nonhomogeneous ring, we obtain a two-sided estimate which coincides with the "unimproved" estimate in the limit case of the narrow ring. As an example, the problem of braking of a system of two nearly situated narrow rings is considered.

Dry friction, rigid body

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