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Início Arquivos Thermal Letter Representantes Futuras reuniões Assembléia das Conferências Internacionais de Transferência de Calor
International Heat Transfer Conference 10

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

DRY-OUT PHENOMENA AT TWO-PHASE FLOWS IN TUBES WITH POROUS COATINGS.

A.V. Zuev
Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

Stanislav P. Malyshenko
Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia

DOI: 10.1615/IHTC10.2460
pages 147-150

Resumo

The basic results of the experimental investigations of dry-out phenomena and hydraulic resistance at forced dispersed ring two-phase up flows of steam-water mixtures into vertical tubes are present in this paper. The investigations were make in wide region of mass-velocities, pressures, steam qualities and heat loads. The experimental results demonstrate that porous layers deposited on heated surfaces change the boiling crisis nature essentially. The time of crisis development is dramatically increase by more than an order of magnitude. It is possible to enhance the critical steam void-fraction and appreciably the thermal stability at forced two-phase flows in the channels with porous coatings.

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