Preliminary numerical study on hydrogen distribution characteristics in the process that flow regime transits from jet to buoyancy plume in time and space
Preliminary numerical study on hydrogen distribution characteristics in the process that flow regime transits from jet to buoyancy plume in time and space
复制标题
射流流型向浮力羽流时空转变过程中氢气分布特征的初步数值研究
DOI：
10.1016/j.net.2019.05.002
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发表时间：
2019-05
影响因子：
2.7
通讯作者：
Jiang Xiaowei
中科院分区：
文献类型：
--
作者：
Wang Di;Tong Lili;Liu Luguo;Cao Xuewu;Zou Zhiciiang;Wu Lingjun;Jiang Xiaowei
Hydrogen-steam gas mixture may be injected into containment with flow regime varying both spatially and transiently due to wall effect and pressure difference between primary loop and containment in severe accidents induced by loss of coolant accident. Preliminary CFD analysis is conducted to gain information about the helium flow regime transition process from jet to buoyancy plume for forthcoming experimental study. Physical models of impinging jet and wall condensation are validated using separated effect experimental data, firstly. Then helium transportation is analyzed with the effect of jet momentum, buoyancy and wall cooling discussed. Result shows that helium distribution is totally dominated by impinging jet in the beginning, high concentration appears near gas source and wall where jet momentum is strong. With the jet weakening, stable light gas layer without recirculating eddy is established by buoyancy. Transient reversed helium distribution appears due to natural convection resulted from wall cooling, which delays the stratification. It is necessary to concern about hydrogen accumulation in lower space under the containment external cooling strategy. From the perspective of experiment design, measurement point should be set at the height of connecting pipe and near the wall for stratification stability criterion and impinging jet modelling validation.
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影响因子：
2
作者：
Jiang Zhe;V. Modi
通讯作者：
Jiang Zhe;V. Modi
不同连接管的两室氢气流动行为数值研究
影响因子：
1.1
作者：
Liu HanChen;Cao XueWu
通讯作者：
Cao XueWu
影响因子：
1.9
作者：
Dezhong Wang;Xuewu Cao
通讯作者：
Dezhong Wang;Xuewu Cao
影响因子：
1.7
作者：
O. Auban;R. Zboray;D. Paladino
通讯作者：
O. Auban;R. Zboray;D. Paladino
DOI：
10.1016/s0065-2717(08)70296-x
发表时间：
1995
期刊：
Advances in heat transfer
影响因子：
--
作者：
B. W. Webb;C. F. Ma
通讯作者：
B. W. Webb;C. F. Ma