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从气体动力学入手,通过对气体微元进行质量平衡、动量平衡、能量平衡的分析,采用了新的扩散模型对危险性气体的扩散进行数值模拟,为了验证模型的合理性,设计简易风洞,对轻重气体(包括二氧化碳、丙烯、乙炔等气体)在不同的泄放条件下进行了多次定常风洞扩散试验,得到了气体实际扩散后浓度的分布,同时也考察了风速、泄放速率、气体密度等主要因素对气体扩散的影响,得到气体扩散的一般规律。模型计算结果与试验数据吻合较好,最大浓度计算值与试验值的平均偏差在20%以内,且浓度分布趋势一致,从而证明了该模型的合理性。编制了模拟软件可作为泄漏扩散事故的预防及发生事故后采取应急防护措施的分析工具
Starting from the gas dynamics, through the mass balance, momentum balance and energy balance analysis of the gas microelements, a new diffusion model is used to simulate the diffusion of dangerous gases. In order to verify the rationality of the model, a simple wind tunnel , Several steady-state wind tunnel tests were conducted on light and heavy gases (including gases such as carbon dioxide, propylene and acetylene) under different venting conditions. The distribution of concentrations after gas diffusion was obtained, and the effects of wind speed, , Gas density and other major factors on the gas diffusion, get the general law of gas diffusion. The model calculation results are in good agreement with the experimental data. The average deviation between the calculated value of the maximum concentration and the experimental value is within 20%, and the trend of the concentration distribution is consistent. This proves the rationality of the model. The simulation software can be compiled as a tool to prevent leakage accidents and take emergency measures after accident