Maximum Heat Flux in Relation to Quenching of a High Temperature Surface with Liquid Jet Impingement
Author(s)
Mozumder, Aloke Kumar
Monde, Masanori
Woodfield, Peter Lloyd
Islam, Md Ashraful
Griffith University Author(s)
Year published
2006
Metadata
Show full item recordAbstract
Experimental investigation has been conducted for quenching of hot cylindrical blocks made of copper, brass and steel with initial block temperature 250-400 àby a subcooled water jet of diameter of 2 mm. The subcooling was from 5 to 80 K and the jet velocity was from 3 to 15 m/s. After impingement, the jet stagnates for a certain period of time in a small region near the centre and then the wetting front starts moving outwards. During this movement, when the surface temperature at the wetting front drops to 120-200 ì the surface heat flux reaches its maximum value due to forced convection nucleation boiling. The maximum heat ...
View more >Experimental investigation has been conducted for quenching of hot cylindrical blocks made of copper, brass and steel with initial block temperature 250-400 àby a subcooled water jet of diameter of 2 mm. The subcooling was from 5 to 80 K and the jet velocity was from 3 to 15 m/s. After impingement, the jet stagnates for a certain period of time in a small region near the centre and then the wetting front starts moving outwards. During this movement, when the surface temperature at the wetting front drops to 120-200 ì the surface heat flux reaches its maximum value due to forced convection nucleation boiling. The maximum heat flux is a strong function of the position on the hot surface, jet velocity, block material properties and jet subcooling. A new correlation for maximum heat flux is proposed.
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View more >Experimental investigation has been conducted for quenching of hot cylindrical blocks made of copper, brass and steel with initial block temperature 250-400 àby a subcooled water jet of diameter of 2 mm. The subcooling was from 5 to 80 K and the jet velocity was from 3 to 15 m/s. After impingement, the jet stagnates for a certain period of time in a small region near the centre and then the wetting front starts moving outwards. During this movement, when the surface temperature at the wetting front drops to 120-200 ì the surface heat flux reaches its maximum value due to forced convection nucleation boiling. The maximum heat flux is a strong function of the position on the hot surface, jet velocity, block material properties and jet subcooling. A new correlation for maximum heat flux is proposed.
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Journal Title
International journal of heat and mass transfer
Volume
49
Issue
17-18
Subject
Mechanical Engineering not elsewhere classified
Mathematical Sciences
Physical Sciences
Engineering