CAJ | 학술논문

针对入口压力为 0.20～0.60 MPa 的饱和蒸汽在 20～70℃过冷水中形成的过膨胀超音速蒸汽浸没射流凝结进行了实验研究.观察到了渐缩形、收缩-膨胀-收缩形、收缩-膨胀-发散形和发散形汽羽,汽羽形状主要由入口蒸汽压力和过冷水温度决定,给出了汽羽凝结形态分布图.同时,给出了汽羽的轴向和径向温度分布规律,在靠近喷嘴附近,温度变化幅度比较大,在远离喷嘴处,温度变化趋于平缓;汽羽的轴向温度分布与汽羽的形状密切相关.
침대입구압력위 0.20～0.60 MPa 적포화증기재 20～70℃과랭수중형성적과팽창초음속증기침몰사류응결진행료실험연구.관찰도료점축형、수축-팽창-수축형、수축-팽창-발산형화발산형기우,기우형상주요유입구증기압력화과랭수온도결정,급출료기우응결형태분포도.동시,급출료기우적축향화경향온도분포규률,재고근분취부근,온도변화폭도비교대,재원리분취처,온도변화추우평완;기우적축향온도분포여기우적형상밀절상관.
The condensation of over-expanded supersonic steam jet in subcooled water is experimentally investigated. The inlet steam pressure and subcooled water temperature are in the range of 0.2～0.6 MPa and 20～70℃, respectively. Four different steam plume shapes, including contraction, contraction-expansion-contraction, contraction-expansion-divergent and divergent shapes, are observed in present test conditions. The results indicate that, the steam plume shape is controlled by the inlet steam pressure and water temperature, and the condensation regime map is given. Moreover,the axial and radial temperature distributions along the steam plume and in the surrounding water are measured. The temperature intensely varies near the nozzle exit, and tends to gradually decay to the ambient water temperature. The results indicate that the axial temperature distributions represent the steam plume shapes.