Аңдатпа
Abstract Model of the vapour bubbles formed at the solid surface in porous structures and steam generating wall (base) was developed. The model is based on filming and photography by high-speed camcorder SKS-1M. Heat flow extraction (up to 2.106 Wm−2) is ensured by the joint action of capillary and mass forces with application of intensifier. The analytical model is based on the theory of thermoelectricity. Limit state of the poor conductive porous coating and metal base are determined. Heat flows were calculated from the time of spontaneous birth of vapour bubble (10-8) to the material destruction time (102÷103s), i.e. the time interval was described from the relaxation process to macro process (destruction). The size of pulled particles at the moment of porous coating destruction in model gave a good match with trial at the optic stand.