scholarly journals Columbia University Flow Instability Experimental Program, Volume 10: Critical Heat Flux Test Program data tables

1993 ◽  
Author(s):  
D.A. Coutts
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Flow Instability ◽  
Experimental Program ◽  
Columbia University ◽  
Test Program ◽  
Data Tables ◽  
Program Data

scholarly journals Columbia University flow instability experimental program: Volume 6. Single annulus tests, transient test program

1992 ◽  
Author(s):  
T. Dougherty ◽  
C. Maciuca ◽  
E.V. Jr. McAssey ◽  
D.G. Reddy ◽  
B.W. Yang
Keyword(s):  
Flow Instability ◽  
Experimental Program ◽  
Columbia University ◽  
Test Program

Flow Instability and Critical Heat Flux for Flow Boiling of Water in a Vertical Annulus at Low Pressure

2011 ◽  
Author(s):  
Christoph Haas ◽  
Leonhard Meyer ◽  
Thomas Schulenberg
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Mass Flux ◽  
Flow Instability ◽  
Flow Boiling ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Low Pressure ◽  
Vertical Annulus ◽  
Zircaloy Tube

We investigated the critical heat flux (CHF) for flow boiling of water in a vertical annulus. The coaxial annulus has a diameter ratio of 1.37 and the inner zircaloy tube is heated directly over a length of 325 mm. CHF can occur prematurely due to flow instabilities. Therefore, we analyzed the flow stability at different heat input conditions using two types of pumps, a rotary and a gear type pump. The unstable CHF occurred at 61% and 90% of the stable value for the rotary and the gear type pump, respectively. Consequently, the following CHF experiments were conducted at stable flow conditions. The outlet pressure was constant at 120 kPa, the mass flux varied from 250 to 1000 kg/(m2s) and the inlet subcooling was at 102, 167, and 250 kJ/kg. The CHF results increase with mass flux from 0.67 to 2.62 MW/m2 and show similar trends compared to literature data. However, the experimental data for flow boiling in annuli at low pressure are limited. Additionally, we measured the dynamic contact angle between the zircaloy tube surface and water using the Wilhelmy method.

Onset of flow instability and critical heat flux in thin horizontal annuli

2002 ◽  
Vol 26 (1) ◽  
pp. 1-14 ◽  
Author(s):  
R.M. Stoddard ◽  
A.M. Blasick ◽  
S.M. Ghiaasiaan ◽  
S.I. Abdel-Khalik ◽  
S.M. Jeter ◽  
...  
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Flow Instability ◽  
Horizontal Annuli
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