TY - JFULL AU - Pei-Syuan Ruan and Ya-Chi Yu and Shao-Wen Chen and Jin-Der Lee and Jong-Rong Wang and Chunkuan Shih PY - 2020/2/ TI - Analysis of Air-Water Two-Phase Flow in a 3x3 Rod Bundle T2 - International Journal of Aerospace and Mechanical Engineering SP - 25 EP - 29 VL - 14 SN - 1307-6892 UR - https://publications.waset.org/pdf/10011017 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 157, 2020 N2 - This study investigated the void fraction characteristics under low superficial gas velocity (Jg) and low superficial fluid velocity (Jf) conditions in a 3x3 rod bundle geometry. Three arrangements of conductivity probes were set to measure the void fraction at various cross-sectional regions, including rod-gap, sub-channel and rod-wall regions. The experimental tests were performed under the flow conditions of Jg = 0-0.236 m/s and Jf = 0-0.142 m/s, and the time-averaged void fractions were recorded at each flow condition. It was observed that while the superficial gas velocity increases, the small bubbles started to cluster together and become big bubbles. As the superficial fluid velocity increases, the local void fractions of the three test regions will get closer and the bubble distribution will be more uniform across the cross section. ER -