方案摘要
方案下载应用领域 | 其他 |
检测样本 | 其他 |
检测项目 | |
参考标准 | 暂无 |
During the course of a hypothetical severe accident in a nuclear Pressurized Water Reactor (PWR), hydrogen may be produced by the reactor core oxidation and distributed into the containment. Spray systems are used in order to limit overpressure, to enhance the gas mixing to avoid hydrogen accumulation, and to wash out the fission products. In order to simulate these phenomena with CFD codes, it is first necessary to know the droplet size and velocity distributions close to the outlet nozzle. Furthermore, since most of the phenomena relative to droplets (condensation, gas entrainment, collision) are of particular importance in the region below the nozzle, accurate input data are needed for real-scale PWR calculations. The objective is therefore to determine experimentally these input data. Experimental measurements were performed on a single spray nozzle which is routinely used in many PWRs. This nozzle is generally used with water at a relative pressure supply of 350 kPa, producing a mass flow rate of approximately 1 kg/s. At a distance of 20 cm, where atomization is just achieved, it is found that geometric mean diameter varies from 305 to 366 μm, Sauter mean diameter from 430 to 600 μm and mean axial velocity from 14.1 to 18.4 m/s.
在一个双稳湍流涡旋火焰中,对间歇性动态的时间-频率定位
Particle-laden Taylor-Couette流:高阶转变和径向局部波浪涡旋的证据
7根杆束的流体-结构相互作用:用实验数据对比数值模拟
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