Numerical predictions on turbulent mixing in two parallel channels with a connecting passage at non-heated supercritical fluid condition

非加熱超臨界圧条件における2チャンネル間乱流混合の数値予測

三澤 丈治; 高瀬 和之; 森 英夫*

Misawa, Takeharu; Takase, Kazuyuki; Mori, Hideo*

Numerical analyses on the turbulent mixing effect caused by a difference of fluid temperatures in a two parallel circular channels were conducted for a specific geometry in which subchannels in a fuel bundle of SCWRs are simply simulated. As a result, the following conclusions were derived. (1) The periodic crossing flow due to the drastic variance of the thermo-fluid properties under the supercritical pressure condition can be calculated by the present analysis method. (2) The influence of difference of the width and horizontal length of the rectangular channel between two simulated subchannels upon the time-averaged and instantaneous crossing flow can be evaluated, and(3) The high prospect was acquired regarding the possibility of the numerical prediction of the crossing flow rate in the subchannels of SCWRs.