CALCULATION OF THE LIMITING INITIAL COOLANT CONTENT OF A CAPILLARY-POROUS MATERIAL IN AN EVAPORATIVE THERMAL SHIELD SYSTEM

A refined mathematical model and numerical method are presented to cal culate heat and mass transfer processes in a thermal shield system bas ed on coolant evaporation from a capillary-porous material into an inn er cavity of the protected structure. Phenomena are examined which ori ginate at the warmup stage for a large initial coolant content in the capillary-porous material. The effect of various problem parameters on the value of the limiting initial coolant content for which liquid do es not flow from the porous material is determined.