A numerical analysis of heat transfer processes and hydrodynamics in a twophase closed thermosyphon in a fairly wide range of variation of governing parameters has been investigated. A mathematical model is formulated based on the laws of mass conservation, momentum and energy in dimensionless variables "stream function -vorticity vector velocity -temperature". The analysis of the modes of forced and mixed convection for different values of Reynolds number and heat flows in the evaporation

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... the possibility of using two-phase thermosyphon for cooling gas turbine blades, when the heat is coming from the turbine blades to the thermosyphon is recycled a secondary refrigerant has been studied with different values of the centrifugal velocity. Nusselet Number, streamlines, velocity, temperature fields and temperature profile has been calculated during the investigation. a Corresponding