针对核潜艇日常工作中微量泄漏有害气体、微小颗粒以及人员活动过程中产生的二氧化碳在艇内扩散的安全问题，开展气体和颗粒扩散特性的数值模拟研究。选用组分输运模型和DPM离散相模型研究气体和微小颗粒在不同通风结构下扩散的浓度场，分析送风速度对核潜艇内气体和微小颗粒扩散浓度场的影响规律。结果表明，侧向通风结构相较于混合通风和置换通风结构有良好的稀释能力，在送风速度2.0 m/s下，二氧化碳浓度降至1.4×10?5，有害气体浓度低至5.5×10?7，颗粒停留时间短至217 s。送风速度的提高大幅度降低了气体浓度和颗粒停留时间，但易导致微小颗粒主要停留在低处（y=3 m），占比约为35%。
In order to solve the safety problems of harmful gas and small particles leaking out in the daily work of nuclear submarine, and the diffusion of carbon dioxide generated in the process of personnel activities in the ship, the numerical simulation study of gas and particle diffusion characteristics was carried out. The Species component transport and DPM discrete phase model is used to study the concentration field of gas and small particles diffusion under different ventilation structures, and the influence of supply air speed on the concentration field of gas and small particles diffusion in nuclear submarine is analyzed. The results show that the lateral ventilation structure has a good dilution ability compared with the mixed ventilation and displacement ventilation structure. Under the 2.0 m/s supply speed, the carbon dioxide concentration is reduced to 1.4×10?5, the harmful gas concentration is reduced to 5.5×10?7, and the particle residence time is shortened to 217 s. With the increasing of air supply speed, the gas concentration and particle residence time are greatly reduced, but the tiny particles mainly stay at y=3 m, accounting for about 35%.
2024,46(18): 35-43 收稿日期：2023-11-17
DOI：10.3404/j.issn.1672-7649.2024.18.006
分类号：U698
作者简介：严童童(1999-),女,硕士研究生,研究方向为危险气体的安全排放
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