气压、气温、风速对室内氡气传输影响的三维瞬态数值模拟

Three-dimensional transient simulation of effects of air pressure, temperature and wind on radon transport

利用数值差分方法,模拟了室内氡气传输的三维瞬态过程,定量讨论了气压、气温、风速对室内氡气传输的影响。结果表明:室内氡浓度随高度增加逐渐减小,室外气压、气温、风速的变化,将引起室内压差的变化,从而引起室内氡浓度的变化,其相位差大于180°。计算值与实验值符合得很好。

Three-dimensional transient process of transport of indoor radon has been imitated with numerical differential method, and effects of air pressure, temperature and wind have been quantitatively discussed. The calculation results show that the radon concentration indoors is decreased with the height increasing, and while the air pressure, temperature and wind outside the room change, the pressure differences and radon concentrations indoors will change too, but their phase differences are more than 180°. The experiment proved the measured results consistent with the calculation.