关键词: 金属腐蚀物微粒, 超临界压力, 变物性, 自然对流, 传热传质

Abstract: The deposit of the ferric corrosion products on surface of the tubes in boiler equipment or nuclear power station under the high pressure states will influence on operating economy of the equipment and even result in accident. The corrosion products of structure materials may be soluble or suspended in water after water treatment. The particles diameter is about 10^-3-10^-1μm. Here the conjugate problem of natural convection heat and mess transfer on a heated vertical plate subject to the boundary conditions of the first kind or mixed for water containing of the ferric corrosion products in superoritical pressure states with consideration of the states dependence of the thermal properties was reported. The mechanism of the natural convection heat and mass transfer was revealed and the influence of the states dependence of the thermal properties was analyzed quantitatively in supercritical pressure states. A correlation for natural convection heat and mass transfer in this case was recommended in this paper.

Key words: particles of the ferric corrosion products, supercritical pressure, water, natural convection, heat and mass transfer