Numerical simulation of two-phase flow behavior in Venturi scrubber by interface tracking method

界面追跡法を用いたベンチュリースクラバー内二相流挙動に対する数値解析

堀口 直樹; 吉田 啓之  ; 阿部 豊*

Horiguchi, Naoki; Yoshida, Hiroyuki; Abe, Yutaka*

So celled multi Venturi scrubbers systems are installed in light water reactor systems to realize filtered venting at accident. This system is composed of many Venturi scrubbers (VS) and a water pool. However, the scrubbing mechanism of the self-priming VS including effects of gas mass flow rate and shape of the VS are understood insufficiently in the previous studies. Therefore, we started numerical and experimental study to understand the detailed two-phase flow behavior in the VS. In this paper, to understand the VS operation characteristics for the filtered venting, we performed numerical simulations of two-phase flow behavior in the VS. In the first step of this study, we perform numerical simulations of supersonic flow by the TPFIT to validate the applicability of the TPFIT for high velocity flow like flow in the VS. In the second step, numerical simulation of two-phase flow behavior in the VS including self-priming phenomena. As the results, dispersed flow in the VS was reproduced in the numerical simulation, as same as the visualization experiments.