Karya
Judul/Title An experimental study on the effect of liquid properties on the counter-current fow limitation (CCFL) during gas/liquid counter-current two-phase fow in a 1/30 scaled-down of Pressurized Water Reactor (PWR) hot leg geometry
Penulis/Author ACHILLEUS HERMAWAN A (1); Prof. Dr. Ir. Indarto, DEA., IPM., ASEAN Eng. (2); Karen Vierow Kirkland (3); Prof. Dr. Eng. Ir. Deendarlianto, S.T., M.Eng. (4)
Tanggal/Date 2022
Kata Kunci/Keyword
Abstrak/Abstract To promote the safety of the nuclear reactors, numerous authors have carried out investigations of gas/liquid counter-current two-phase fow in order to understand the characteristics during the inception of fooding or CCFL. The present work covers an experimental and analytical study on the effect of liquid properties on CCFL characteristics in a complex geometry representing 1/30 scaled-down version of a German-Konvoi PWR hot leg. The obtained results reveal that the gas velocity to initiate the fooding monotonically decreases with the increase of the liquid velocity. At high liquid fow rates, it is noticed that with the increase of glycerol percentage, the gas fow rate needed to initiate the fooding signifcantly decrease due to either the increase in liquid viscosity or the decrease in corresponding surface tension. Here under the same fow condition, the fooding is initiated faster by the higher glycerol percentage. Moreover, instead of the well-known Wallis superfcial velocity, the Kutateladze-type parameter or a combination of the Wallis parameter and liquid property numbers by Zapke & Kroger ยจ (1996) which were previously proposed by numerous authors to investigate the effects of liquid properties on CCFL characteristics, a modifed non-dimensional Wallis parameter combined with the inverse viscosity number introduced by Ma et al. (2020) is found herein to more accurately correlate the present experimental data. Through a dimensional similarity analysis, a new empirical correlation reveals that the liquid Froude number is the greatest determinant of CCFL characteristics with respect to the effect of the liquid properties
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Bahasa Asli/Original Language English
Level Internasional
Status
Dokumen Karya
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