Void-fraction measurements in a steady-state mercury-nitrogen flow loop |
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| Authors: | P Munshi P Jayakumar P Satyamurthy T K Thiyagarajan N S Dixit N Venkatramani |
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| Institution: | (1) Department of Mechanical Engineering Indian Institute of Technology Kanpur 208016, India, IN;(2) Fact Ltd Udyogamandalam 683501, India, IN;(3) Laser & Plasma Technology Division Bhabha Atomic Research Centre Mumbai 400085, India, IN |
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| Abstract: | A steady-state vertical mercury-nitrogen flow system has been investigated using three tomographic algorithms. Void-fraction
profiles have been reconstructed by the data collected by a 60 mCi gamma-ray source and a single Na(Tl) detector. The results
indicate excellent agreement (within ±1%) between the least-squares-solution and the chord-segment-inversion algorithms. The
data-collection time for each data-ray was varied so that in each case 3000 counts could be collected to reduce the detrimental
effect of Poisson statistics in the reconstructed profiles. Eleven sets of data have been collected for nitrogen flow-rates
between 0.00123 and 0.00884 kg/s. The mercury flow-rates were between 17.6 and 34.1 kg/s. The resulting cross-sectional average
void varied between 0.10 and 0.38.
Received: 13 March 1997/Accepted: 12 September 1997 |
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