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Water spray cooling of stainless and C‐Mn steel
Author(s) -
Olden Vigdis,
Raudenský Miroslav,
Onsrud Kristin,
Hummel Wolfgang
Publication year - 1998
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199805543
Subject(s) - heat transfer coefficient , thermodynamics , nucleate boiling , nozzle , materials science , heat transfer , steady state (chemistry) , heat flux , critical heat flux , water cooling , flux (metallurgy) , leidenfrost effect , water flow , airflow , metallurgy , mechanics , chemistry , environmental science , environmental engineering , physics
This paper describes laboratory cooling experiments of C‐Mn and stainless steel with a water/air nozzle. Experiments included use of both the steady state and the transient experimental method. The heat transfer coefficient was calculated both analytically and by a numerical method. The heat transfer coefficient was evaluated as a function of steel surface temperature, water flux, material and water/air flow. It was found that by increasing the water flux the heat transfer coefficient also increased. The Leidenfrost point was shifted to higher temperatures. Increasing air flow was also found to increase the heat transfer coefficient. Maximum heat transfer coefficient was twice as large for the C‐Mn steel as for the stainless steel. Comparison of the steady state and transient experimental method showed good agreement in the temperature range 200 – 500°C, and with a water flux of 2I/m 2 s. Above 500°C it was difficult to obtain stable conditions for the steady state experiments.