重气扩散研究旨在为危险性化学品泄漏救援提供科学参考.重气扩散主要研究方法包括试验研究、物理模拟、数值模拟,与试验研究与物理模拟相比,数值模拟的优点在于其成本低、耗时短和重复性高.对重气扩散的数值模拟模型进行归纳和分类,阐述了模型的基本原理,分析了各种模型的优缺点以及使用局限性,并在数值模拟模型的选择上给出建议,为进一步提高重气扩散数值模拟的准确性和重复性提供理论基础.%Research on gas diffusion was aimed at providing scientific basis for hazardous chemicals leakage rescue.The main research methods of dense gas dispersion included experimental research,physical simulation and numerical simulation.Compared to experimental research and physical simulation,numerical simulation had aduantages like low cost and short time consuming and highly repeatabbility.Models of numerical simulation for dense gas dispersion were summarized and classified,the basic principle of the model was described,the advantages and disadvantages of each model were analyzed,and the limitations of the model were revealed.Suggestions on method of selecting numerical simulation model of dense gas dispersion was proposed.The paper provided a theoretical basis for improving the accuracy and the repeatability of the numerical simulation of dense gas dispersion.
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