СRITICAL SPEED NUMERICAL DETERMINATION FOR ARBITRARY TUBE BUNDLE IN FLUID FLOW

KAPLUNOV Saveliy M., D. Sc. in Eng., Prof., Laboratory Chief, Mechanical Engineering Research Institute of the Russian Academy of Sciences, Moscow, Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

VALLES Natalya G., Ph. D. in Eng., Senior Researcher, Mechanical Engineering Research Institute of the Russian Academy of Sciences, Moscow, Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

DRONOVA Elena A., Researcher, Mechanical Engineering Research Institute of the Russian Academy of Sciences, Moscow, Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SAMOLYSOV Alexey V., Postgraduate Student, Mechanical Engineering Research Institute of the Russian Academy of Sciences, Moscow, Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

On the basis of the analysis results of experimental behavior of tube bundles under separated flow, the mathematical model for hydroelastic vibration excitation mechanism of tube bundle was developed. The problem of the onset of hydroelastic excitation of a tube bundle reduces to the development of an instability of the unperturbed state of elastic tubes. On the basis of a theoretical study of the mathematical model, a necessary and sufficient condition for the stability of the tube bundle, expressed through the dimensionless parameters of the system, was obtained. Two numerical vortex calculation methods are used in this paper: the method of discrete vortices and the method of viscous vortex domains. The aim of the study: developing methods for flow velocity unacceptable values and tube heat exchangers operational safety determination.

separated flow, mathematical model, hydroelastic excitation, vortex methods, viscous vortex domains method, stability criteria

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