Modeling of thermal stresses destroying the porous coating of heat-exchange surfaces of power plants

Abstract

Modeling of the low heat conductive low-porous capillary porous coatings and metal (copper, stainless steel) surfaces (base layer) was studied. Heat and mass transfer in the porous coatings moved with excessive liquid due to the combined action of capillary and mass forces. The dynamics of vapor bubble was described along with their heat-dynamic properties, which were observed by the optic research methods. Finding solution for the thermoelasticity allowed to reveal the influence of the specific heat flow and heat tension of compression and stretching depending on time of supply and sizes of pulled particles at the time of the system limit state as to "porous coating - base layer". The theory was confirmed by the trial, which was observed by camcorder SKS-1М.

Keywords

• капиллярно-пористые покрытия
• естественные минеральные среды
• термоупругость
• напряжения сжатия
• напряжения растяжения
• модель
• элементы энергоустановок
• тепломассообмен