Proceedings of the Korean Nuclear Society Conference (한국원자력학회:학술대회논문집)
- 1996.11a
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- Pages.254-259
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- 1996
Size Measurements of Droplets Entrained in a Stagnant Bubbling Liquid Column
- Jeong, Hae-Yong (Korea Advanced Institute of Science and Technology) ;
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No, Hee-Cheon
(Korea Advanced Institute of Science and Technology) ;
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Song, Chul-Hwa
(Korea Atomic Energy Research Institute) ;
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Chung, Moon-Ki
(Korea Atomic Energy Research Institute)
- Published : 1996.11.01
Abstract
Phase Doppler particle analyze. (PDPA) is a instrument which can be used to obtain simultaneous size and velocity measurements in a multiphase flow. In this study, the size of the water droplets entrained from a bubbling surface of a stagnant liquid column is measured by PDPA with a specially designed transmitter of long focal length and large beam diameter. The test section tube is made of acryle with 18 mm I.D. and 900 mm length. The experimental data are obtained for the air superficial velocity between 0.7 m/s to 3.4 m/s at atmospheric pressure. The experimental results show that there exists large difference in the entrainment mechanism between the churn-turbulent flow and annular flow. Through the present study, the phase Doppler analyzer system is shown to be successfully applied to measure particle sizes larger than
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