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VOID FRACTION PROFILE MEASUREMENTS IN 2-PHASE MERCURY-NITROGEN FLOWS USING GAMMA-RAY ATTENUATION METHOD

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Title VOID FRACTION PROFILE MEASUREMENTS IN 2-PHASE MERCURY-NITROGEN FLOWS USING GAMMA-RAY ATTENUATION METHOD
 
Creator THIYAGARAJAN, TK
SATYAMURTHY, P
DIXIT, NS
VENKATRAMANI, N
GARG, A
KANVINDE, NR
 
Subject void fraction
void fraction profile
2-phase flow measurements
flow diagnostics
liquid metal magnetohydrodynamics diagnostics
 
Description A nonintrusive measurement system using gamma rays from a Co-60 source is developed to measure the void fraction profile in a two-phase flow of a high-density liquid metal and nitrogen. The method is based on the attenuation of gamma rays along various chord lengths in the cross section of a pipe line. Both the chord segment inversion (CSI) method and the feast squares solution (LSS) method were applied to obtain void fraction profiles from the data. The CSI method gave spurious oscillations in the void fraction profiles, which could be attributed to the Poisson corruption due to low count rate. On the other hand, the LSS method did not contain any oscillations. Experiments were performed in the vertical riser pipe of a gravitational-type liquid metal magnetohydrodynamic loop with mercury-nitrogen two-phase flow. Void fraction profiles were obtained for various flow rates at two locations in the riser pipe. The average void fraction obtained from the profile data was compared with the values predicted by empirical relations developed for vertical two-phase hows.
 
Publisher ELSEVIER SCIENCE PUBL CO INC
 
Date 2011-07-27T14:01:54Z
2011-12-26T12:57:21Z
2011-12-27T05:47:28Z
2011-07-27T14:01:54Z
2011-12-26T12:57:21Z
2011-12-27T05:47:28Z
1995
 
Type Article
 
Identifier EXPERIMENTAL THERMAL AND FLUID SCIENCE, 10(3), 347-354
0894-1777
http://dx.doi.org/10.1016/0894-1777(94)00082-J
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7243
http://hdl.handle.net/10054/7243
 
Language en