Ai

pp.75-87

Relevance of this work is associated with the problem caused by ever-increasing usage of cryogenic fluids in the space rocket technology. Further exploration of space is impossible without creation of orbital cryogenic gas stations. A distinctive feature of all cryogenic liquids is a non-uniform distribution of density and temperature observed during all modes of operation and storage. A suitable model for studying motion of a mechanical system is a heterogeneous incompressible fluid. In this work interaction between a heterogeneous incompressible fluid and a movable rigid body’s cavity was discussed. Cases in which motion of a rigid body is caused by the action of momentary forces or cases of abrupt movement were considered. The authors proposed a concept of quasi-potential of fluid velocities was introduced; solution to the problem of motion of a rigid body with a cylindrical cavity partially or completely filled with a cryogenic liquid.