LNG储罐泄漏模型计算、模拟及实验研究
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摘要
利用数值计算模型中的板模型、Fluent模拟、现场实验3种方式研究LNG储罐泄漏爆炸极限扩散范围,进行对比分析。板模型计算得出,当泄漏量为0.12 kg/s时,爆炸范围约为3.47～11.39 m。Fluent模拟得出泄漏量为0.04 kg/s时,爆炸范围约为1.25～9.6 m;泄漏量为0.12 kg/s时,爆炸范围约为3.6～12.0 m;泄漏量为0.20 kg/s时,爆炸范围约为5.0～14.0 m。实验得出泄漏量为0.12 kg/s时,爆炸范围约为3.5～11.5 m。板模型、Fluent模拟、现场实验3种方式对比得出,泄漏量为0.12 kg/s时,3种方式的LNG泄漏扩散体积分数范围基本一致。
The explosion limit diffusion range of leakage of LNG tank is studied by three ways including the plate model in the numerical calculation model,the Fluent simulation and the field experiment,and a comparative analysis is made. The plate model calculation shows that when the leakage rate is 0. 12 kg/s,the explosion range is about 3. 47 to 11. 39 m. The Fluent simulation shows that when the leakage rate is0. 04 kg/s,the explosion range is about 1. 25 to 9. 6 m; when the leakage rate is 0. 12 kg/s,the explosion range is about 3. 6 to 12. 0 m; and when the leakage rate is 0. 20 kg/s,the explosion range is about 5. 0 to14. 0 m. The field experiment shows that when the leakage rate is 0. 12 kg/s,the explosion range is about3. 5 to 11. 5 m. The comparison of the three ways shows that when the leakage rate is 0. 12 kg/s,the range of LNG leakage diffusion volume fraction in three ways is basically the same.
The explosion limit diffusion range of leakage of LNG tank is studied by three ways including the plate model in the numerical calculation model,the Fluent simulation and the field experiment,and a comparative analysis is made. The plate model calculation shows that when the leakage rate is 0. 12 kg/s,the explosion range is about 3. 47 to 11. 39 m. The Fluent simulation shows that when the leakage rate is0. 04 kg/s,the explosion range is about 1. 25 to 9. 6 m; when the leakage rate is 0. 12 kg/s,the explosion range is about 3. 6 to 12. 0 m; and when the leakage rate is 0. 20 kg/s,the explosion range is about 5. 0 to14. 0 m. The field experiment shows that when the leakage rate is 0. 12 kg/s,the explosion range is about3. 5 to 11. 5 m. The comparison of the three ways shows that when the leakage rate is 0. 12 kg/s,the range of LNG leakage diffusion volume fraction in three ways is basically the same.
引文
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[2]彭世尼,段萍.LNG泄漏后果的预测模型[J].重庆大学学报(自然科学版),2006(1):93-97.
[3]何莎,袁宗明,喻建胜.重气效应研究进展[J].中国测试技术,2008(4):36-39.
[4]黄琴,蒋军成.重气扩散研究综述[J].安全与环境工程,2007(4):36-39.
[5]孙宝江.重气泄漏扩散影响因素分析及模型研究[J].科技世界,2015(2):42-43.
[6]于湘,俞志东.LNG泄漏扩散影响因素模拟研究[J].当代化工,2017,46(1):68-71.
[7]KUNSCH J P,WEBBER D M.Simple box model for dense-gas dispersion in a straight sloping channel[J].Journal of Hazardous Materials,2000,75(1):29-46.
[8]王俊清.LNG泄漏扩散规律及危险浓度区域研究(硕士学位论文)[D].济南:山东建筑大学,2017:30-34.
[9]史晓娟.LNG泄漏扩散规律的研究(硕士学位论文)[D].济南:山东建筑大学,2015:20-22.
[10]BAETKE F,WERNER H,WENGLE H.Numerical simulation of turbulent flow over surface-mounted obstacles with sharp edges and corners[J].Journal of Wind Engineering and Industrial Aerodynamics,1990,35:129-147.
[11]胡圣超.LNG储罐泄漏蒸气扩散模拟研究(硕士学位论文)[D].武汉:华中科技大学,2014:43-45.
[12]VAN DOORMAAL J P,RAITHBY G D.Enhancements of the simple method for predicting incompressible fluid flows[J].Numerical Heat Transfer Applications,1984(7):147-163.