神光Ⅲ靶场室内空气流动三维数值仿真

3-D Numerical Simulation and Analysis on Indoor Airflow in SG-Ⅲ Facility Target Area

在靶场室内环境优化预测问题的研究中,由于神光Ⅲ装置靶场中间层室内空气流动存在绕流回流,对系统稳定性造成影响。为此利用标准k-ε模型、RNG k-ε模型和SST k-ω模型各自特点,分别利用三种模型对流场进行了数值仿真。结果表明三种模型预测的气流组织主体上基本相似,都预测了回流漩涡和绕流的产生,均能满足工程计算精度需求,与在房间外延空气回流区域,采用RNG k-ε模型和SST k-ω模型的分析结果基本一致,在靶球附近绕流区域,二者所得的速度与标准k-ε模型偏差接近10%,说明改进方法更有优势。

In the study of indoor air environment optimization and prediction problem in SG-Ⅲ facility target area, the around flow and recirculation flow occurred in middle-floor and impacted on the target system stability. Based on the different characteristics of the standard k-ε model, RNG k-ε model and SSTk-tomodel, the three models were respectively applied to simulate the flow. It was shown that the main air distribution predicted by three models were quite similar, the around flow and recirculation flow appeared in all three results and they can also satisfy the precision of engineering calculation. In the recirculation flow zones, RNG k-ε model and SST k-ωmodel achieved better consistency results. In the around flow zones, the results of RNG k-ε model and SST k-ωmodel were nearly the same, the velocities of them had 10% error with the one of the standard k-ε model. It was illustrated that the improved models had more advantages for the simulation in these zones.