Transient cooling of a hot metal plate with an impinging water jet
Transient boiling heat-transfer rate of a two-dimensional impinging water jet was measured throughout the surface of a 20 x 150 mm rectangle, during cooling from approximately 400 C to 100 C. Time-dependent surface-temperature distributions and the progress of a solid-liquid contact front were obtained for jet subcooling from 14 K to 50 K. Solid-liquid contact at the stagnation line starts from the moment of jet impingement, where violent boiling occurs and generated vapor splashes the water film; this results in deprivation of water supply to the outer region of the surface. The temperature of the outer surface remains high up to the time when the solid-liquid contact front reaches it and a large temperature gradient appears near the front. The surface temperature for the initiation of solid-liquid contact is higher at locations nearer the stagnation line and with higher jet subcooling.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 451993
- Journal Information:
- Heat Transfer - Japanese Research, Vol. 24, Issue 6; Other Information: PBD: 1995
- Country of Publication:
- United States
- Language:
- English
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