Accession Number:

AD0255520

Title:

AN ANALYTICAL AND EXPERIMENTAL STUDY OF THE THERMAL BOUNDARY LAYER AND EBULLITION CYCLE IN NUCLEATE BOILING

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s):

Report Date:

1961-05-01

Pagination or Media Count:

1.0

Abstract:

The ebullition cycle of nucleate pool boiling from a heating strip was studied through the use of high-speed motion pictures of schlieren and shadowgraph images. The effects of bubble agitation on thermal layer and neighboring bubbles were observed. An over-all model of ebullition based upon experimental observation was proposed that included an analytical method for predicting bubble growth rate and an analysis of the factors that influence the magnitude of the waiting period time interval between bubbles at a particular site. Thermal-layer thickness, cavity size, and area of influence of a growing bubble are considered. A film supplement is made available. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE