Abo Bibliothek: Guest

ISSN Online: 2377-424X

International Heat Transfer Conference 5
September, 3-7, 1974, Tokyo, Japan

STUDY OF MECHANISM OF BURN-OUT IN A HIGH HEAT-FLUX BOILING SYSTEM WITH AN IMPINGING JET

Get access (open in a dialog) DOI: 10.1615/IHTC5.570
pages 245-249

Abstrakt

Nucleate boiling at very high heat fluxes was created on a heated surface covered with a flowing film of saturated water at atmospheric pressure being maintained by a small circular jet of water held at the center of the heated surface. It was found that increasing the heat flux leaded to a limiting state of flow where the splashing of droplets from the heated surface was no longer increased being kept constant till the burn-out appeared; and that there was a close relation between the burn-out heat flux and the jet velocity. A flow model, which can explain characteristics of this boiling system, is proposed, and it is suggested that the burn-out may be connected with the separation of a liquid flow from the heated surface accompanied with the effusion of vapor.