TWO PHASE FLOW ABOUT A STAGNATION POINT IN FILM BOILING

1961 ◽  
Author(s):  
W. H. Gallaher
Keyword(s):  
Stagnation Point ◽  
Two Phase Flow ◽  
Film Boiling ◽  
Phase Flow ◽  
Two Phase

Stagnation-point forced convection in two-phase flow.

AIAA Journal ◽  
1967 ◽  
Vol 5 (6) ◽  
pp. 1182-1183 ◽  
Author(s):  
HSU-CHIEH YEH ◽  
WEN-JEI YANG
Keyword(s):  
Stagnation Point ◽  
Forced Convection ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

Cryogenic Two-Phase Flow During Chilldown

Volume 3 ◽  
2004 ◽  
Author(s):  
Christopher Velat ◽  
Jelliffe Jackson ◽  
James F. Klausner ◽  
Renwei Mei
Keyword(s):  
Film Thickness ◽  
Flow Regime ◽  
High Velocity ◽  
Test Section ◽  
Two Phase Flow ◽  
Nucleate Boiling ◽  
Film Boiling ◽  
Phase Flow ◽  
Two Phase ◽  
Regime Transitions

This work describes an experimental investigation of the transient two-phase flow behavior of liquid nitrogen flowing through a pipeline during the chilldown process. The evaporation process and flow regime transitions were observed during chilldown. Initially pure vapor is observed in the visual test section. Then a moving film boiling front is observed to move through the test section. The length of the film boiling front appears to be very small compared with the length of the facility pipeline. After the film boiling front passes through the test section, a very high velocity stratified two-phase flow appears with a small liquid film thickness. As the pipeline is chilled, the film thickness grows. It appears that the high velocity two-phase flow suppresses nucleate boiling, and the dominant heat transfer mechanism is two-phase bulk turbulent convection. Evaporation occurs at the liquid/vapor interface. A high-speed video camera is used to observe the flow regime transitions during the transient chilldown process. Flow regime comparisons have been made with the Steiner [1], Kattan-Thome-Favrat [2], and Baker [3] flow regime maps.

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