INFLUENCE OF NON-STATIONARY CONDITIONS ON RELIABILITY OF SPACE SYSTEMS WITH HEAT PIPES UNDER THE EFFECT OF VIBRATIONS

摘要

Reliability of functioning of space systems with heat pipes can be determined by work during their starting and going to a design condition, by shutting-off, by transition from one heat condition on another. The report represents new results of investigation of influence force fields (vibration and gravity) on heat and mass transfer processes in heat pipes on non-stationary operating modes. Heat modes are investigated in variable gravitational fields simultaneously with action of vibrations on non-stationary modes. Dynamics of thermal channels with phase transitions in capillary - porous structures and its influence on areas of the worsened and improved modes of heat and mass transfer is investigated. The temperature criterion for the generalized description of an estimation of a thermal condition of a pipe is offered. Time of achievement of 95 % of a corresponding mode is used as an estimation of efficiency of its work.