가열면의 경사각이 푸울 핵비등 열전달에 미치는 영향

Abstract

This study has been carried out to investigate the effect of surface inclination on pool boiling of water under atmospheric pressure from a copper flat plate whose inclination is varied between 0˚and 175˚ from horizontal plane.

Through this study, several conclusions have been obtained as follows:

(1) Nucleate pool boiling region is devided into the low heat flux region and high heat flux region. The former is influenced by inclination degree of the heated surface and the latter is not influenced by it at all.

(2) The heat flux on the bordering of high and low heat flux region corresponds to transitional heat flux of bubble shape suggested by Moissis and Brenson. ??

(3) The area fraction of heating surface, influenced by the departing bubbless per unit area, and the heat flux of an arbitrarily inclined plane can be predicted from the pool boiling curve of a horizontal plane under the conditions of the same liquid and surface.

This study has been carried out to investigate the effect of surface inclination on pool boiling of water under atmospheric pressure from a copper flat plate whose inclination is varied between 0˚and 175˚ from horizontal plane.

Through this study, several conclusions have been obtained as follows:

(1) Nucleate pool boiling region is devided into the low heat flux region and high heat flux region. The former is influenced by inclination degree of the heated surface and the latter is not influenced by it at all.

(2) The heat flux on the bordering of high and low heat flux region corresponds to transitional heat flux of bubble shape suggested by Moissis and Brenson. ??

(3) The area fraction of heating surface, influenced by the departing bubbless per unit area, and the heat flux of an arbitrarily inclined plane can be predicted from the pool boiling curve of a horizontal plane under the conditions of the same liquid and surface.