CFD modelling of condensation of vapour in the pressurized PPOOLEX facility
CFD modelling of condensation of vapour in the pressurized PPOOLEX facility
复制标题
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
T. Pättikangas;J. Niemi;J. Laine;M. Puustinen;H. Purhonen
中科院分区：
文献类型：
--
作者：
T. Pättikangas;J. Niemi;J. Laine;M. Puustinen;H. Purhonen
通过实验和CFD计算研究了抑压容器的性能。实验是在PPOOLEX测试设备上进行的，这是一个按比例缩小的沸水堆压抑制容器的双室模型。在实验中，蒸汽被吹进最初充满空气的干井隔间。当压力增加时，空气和蒸汽的混合物通过排气管流入湿井隔间的水池。利用FLUENT代码的EulerEuler两相模型对实验前100秒进行了CFD模拟。在模型中，气相由空气和蒸汽两种组分组成。在壁面冷凝过程中，冷凝水在壁面上形成一层膜层，这是由近壁网格单元中气相到液态水相的传质所模拟的。从气相通过水膜到壁面的热传递得到了解决。用传热系数来模拟井内的直接接触冷凝。计算得到的温度、压力和壁面凝结量与PPOOLEX实验结果进行了比较。
The behaviour of a pressure suppression containment is studied experimentally and by performing CFD calculations. The experiments have been performed with the PPOOLEX test facility, which is a scaled-down two-compartment model of a pressure suppression containment of a BWR. In the experiments, vapour is blown into the drywell compartment initially filled with air. When the pressure increases, the mixture of air and vapour f lows through the vent pipe into the water pool of the wetwell compartment. CFD simulation of the first 100 seconds of the expe riment has been performed by using the EulerEuler two-phase model of FLUENT code. In the model, the gas phase consists of air and vapour species components. In wall condensation, the conde nsing water forms a film layer on the wall surface, which is modelled by mass transfer from th e gas phase to the liquid water phase in the near-wall grid cell. The heat transfer from the gas phase through the water film to the wall is resolved. The direct-contact condensation in the we twell is modelled with a heat transfer coefficient. The calculated temperature, pressure a nd wall-condensation are compared to the results of the PPOOLEX experiment.