Effect of the Behavior of Generated Vapor on the Minimum-Heat-Flux Point During Rapid Quenching of a Thin Horizontal Wire

Autor:	Hiroshi Honda, Hiroshi Takamatsu, Kazuo Tanaka, Hikaru Yamashiro
Rok vydání:	1999
Předmět:	Quenching Materials science Natural convection Mechanical Engineering Thermodynamics Wake Condensed Matter Physics Leidenfrost effect Cylinder (engine) law.invention Physics::Fluid Dynamics Heat flux law Heat transfer Point (geometry) Composite material
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 65:2806-2813
ISSN:	1884-8346 0387-5016
DOI:	10.1299/kikaib.65.2806
Popis:	Heat transfer characteristics and minumum heat flux point (MHF point) condition during rapid quenching of a thin horizontal wire were studied both experimentally and theoretically. Experiments were conducted with ethanol as a quenching liquid. The wire was either fixed or moving downward at a constant speed in an ethanol bath. When the wire was heated instantly to a high temperature, bead like bubbles were formed along the wire. This was in contrast to the previous results for a heated wire that was dipped into the ethanol bath at a relatively high velocity, where a vapor sheet was formed in the wake of the wire. Consideration was given to the effect of film boiling mode on the MHF point condition. A linear stability analysis of vapor film for natural convection film boiling on a horizontal cylinder was presented. The theoretical prediction of the critical vapor film thickness compared well with the measured value at the MHF point for the fixed wire.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::808bf3e5ae1d55c0737637591f267d94 https://doi.org/10.1299/kikaib.65.2806 Zobrazit plný text záznamu