We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
BOILING PHENOMENA OF COOLING WATER IN THE PERMANENT MOLD.
- Authors
Fu-Yuan Hsu; Po-Sen Chen; Huey-Jiuan Lin; Chung-Yung Wu
- Abstract
The boiling phenomena of water in a cooling channel within a permanent mold were studied. The test consisted of heating the mold to high temperatures 1300 °C (2372 °F) for 0.5 ms (milliseconds) followed by low temperatures 200 °C (392 °F) for 49.5 ms. This heating procedure was to simulate the heating condition on the copper wheel mold applied in planar flow casting process. When the velocity of water into the channel was under a critical velocity (1.9 mis), the boiling condition of the coolant could be attained. In the boiling state, the values of the heat transfer coefficient (i.e., heating capability to coolant) and heat flux (i.e., heat absorption capability by coolant) were much greater than those in the non-boiling state. The initial water temperature affected the time to initiate bubbles. A diagram of the heat flux against the heat transfer coefficient was created to analyze the heat removal efficiency of water coolant. A slope value of the linear relationship in the diagram can be applied to classify the states of the boiling flow patterns, boiling nucleation, bubble flow, and plug flow.
- Subjects
PERMANENT mold casting; COPPER; EFFECT of temperature on metals; METAL castings; HEAT transfer; HEAT flux
- Publication
International Journal of Metalcasting, 2015, Vol 9, Issue 2, p31
- ISSN
1939-5981
- Publication type
Article
- DOI
10.1007/BF03355613