異温度流体混合における熱流動特性の評価
Estimation on the thermal hydraulic characteristics in a non-isothermal fluid mixing
著者:
菅原 良昌 Yoshimasa SUGAWARA 結城 和久 Kazuhisa YUKI Hoseini Seyed MOHAMMAD 橋爪 秀利 Hidetoshi HASHIZUME 田中 正暁 Masaaki TANAKA
発刊日:
公開日:
Degree BendFluid MixingSecondary FlowTemperature FluctuationThermal Fatigue
概要
In a process of hot and cold fluid mixing, temperature fluctuation in the fluid can occur. When this fluctuation is caused by unstable fluid mixing process, the surrounding structure would be damaged by high-cycle thermal fatigue. This phenomenon is observed in various nuclear power plants, which means it is important to investigate the relation between the fluid mixing process and the thermal fatigue. When there exists a 90-degree bend i n the upstream of the mixing area, the fluid mixing process becomes more complex due to the occurrence of a secondary flow. In this study, therefore, the flow field in the mixing area and the temperature fluctuation near the wall are measured with a PIV measuring system and thin thermocouples, respectively, to clarify the influence of the secondary flow on the non-isothermal fluid mixing in the T-junction with the 90-degree bend upstream.
