Abstract
A constituent part of frameless devices for rejecting low-potential heat in cycles of new-generation space power plants is a collector of dispersed droplet sheet. Regularities of functioning of passive collectors characterized by the absence of moving parts are studied. Theoretical fundamentals and methods for mathematical and program implementation are developed for the problems of studying motion of films of liquid ultrahigh-vacuum working fluids in space over planar surfaces under conditions of localized mass injection. The physical regularities are revealed that characterize the flow evolution, the outer surface shape of the film, the dependence of its thickness on the initial velocity of motion, coolant temperature, and geometry of the collecting device. The relationships for shape and size of the droplet collector surface are found and parameters of the supporting film of the coolant are defined, whose application may ensure an overlap of collector throat by the film and the achievement of minimum permissible pressure of the recirculating coolant.
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