Date of Award
Summer 1971
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Electrical and Computer Engineering
First Advisor
Linehan, John H.
Second Advisor
Richardson, Bobbie L.
Third Advisor
Gaggioli, Richard A.
Abstract
Low pressure one-component two-phase critical flow studies in long cylindrical tubes were undertaken using Freon-11. Critical discharge pressures from 3.0 to 13.5 psia were observed with measured mass fluxes from 250 to 2100 lbm/ft2 sec in tubes ranging from 25 to 300 length to diameter ratio for varying amounts of entrance subcooling. The effects of four different entrance configurations on mass flux and liquid super-heat were also investigated. Data were also obtained for the critical pressure ratio (ratio of exit pressure to entrance stagnation pressure) variation with entrance subcooling for four different length to diameter ratio tubes. Visual observations of flow regime are related to entrance stagnation conditions. Experimental temperature and pressure profiles at various entrance subcoolings are presented. The data are compared with calculations from three well-known critical flow models.
Recommended Citation
Howard, Paul A., "Two-Phase, One-Component Critical Flow At Sub-Atmospheric Pressures using Freon-11" (1971). Master's Theses (1922-2009) Access restricted to Marquette Campus. 4799.
https://epublications.marquette.edu/theses/4799