液化天然气泄漏扩散实验的CFD模拟验证

运用CFD软件fluent对LNG泄漏扩散的Burro实验进行了模拟,并将不同点处模拟的温度和浓度随时间的变化与实验结果进行了对比.结果表明,温度和浓度的变化趋势与实验值基本一致,水平面、侧面以及对称面上的浓度等值线分布也与实验基本吻合,模拟得到的下风向处甲烷的最大体积分数在近源处要低于实验值,在距离泄漏源较远处则偏高,最后在实验结果的基础上,计算了模拟结果的统计误差,并将其与各种模型的误差进行对比,结果表明fluent的误差要低于其他模型,所预测的值总体上来说偏高.

CFD Simulation on LNG Dispersion

The CFD software-fluent is used to simulate the Burros experiment and the distribution of gas temperature and concentration at different points is contrasted to the experiment results and the result shows that the simulating data fit well to the experimental ones.The contours of CH4 concentration at some fixed planes are compared to the experimental contours.The maximum concentration at downwind distance point shows that the simulation overestimated the maximum concentration at near field downwind distance and underestimates at far field downwind distance.The result of statistical error analysis shows that the error of Fluent is lower than other models' and the simulating value overestimates the Burro series.