Nucleate pool boiling over vertical steps

被引：2

作者：

Baker, J ^{[1
]}

Prasad, K ^{[1
]}

机构：

[1] Univ Alabama, Dept Mech & Mat Engn, Birmingham, AL 35294 USA

来源：

JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER | 1999年 / 13卷 / 03期

关键词：

D O I：

10.2514/2.6460

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Nucleate subcooled pool boiling of water over vertical steps was carried out under atmospheric conditions. Two forward-facing steps of 0.8125 and 0.50 in. were considered. Data were statistically analyzed to determine sampling error. The ebullition was qualitatively explained in terms of thermal/flowfields and bubble dynamics, Plots of boiling heat flux vs superheat and surface heat transfer coefficient vs heat flux have been provided. Empirical correlations, developed from the above mentioned data, are also presented. Boiling on vertically extended surfaces shelf ed an increase in heat flux for a given superheat when compared with a plain vertical surface because of fluid agitation in the region of the step. The parameters associated with bubble dynamics and bubble interactions were also qualitatively discussed.

引用

页码：308 / 313

页数：6