燃气连续泄漏扩散的三维模拟研究
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摘要
准确掌握和明晰燃气泄漏扩散规律,准确地表达出在实际地理空间中燃气泄漏扩散浓度场的分布情况,具有十分重要的意义。以气体热力学、动力学、湍流扩散的梯度理论和统计理论为基础,分析在静风条件下无限空间瞬时点源扩散模式,考虑烟气抬升高度等因素,采用移动烟团积分方法,建立了改进的静风条件下地面点源的天然气连续泄漏扩散模型。以Matlab对模型作计算处理和数值模拟,并以CFD软件进行了模拟验证。
It is very important to accurately master the law of gas leakage diffusion and express the distribution situation of gas leakage diffusion concentration field in the actual geographical space.Based on gradient theory and statistical theory of gas thermodynamics,dynamics and turbulence diffusion,this paper analyzes the infinite space instantaneous point source diffusion mode under static wind and considering lifting height of smoke,established the improved gas continuous leakage diffusion model of ground point-source under static wind by using the integral method of mobile puff.Also Matlab software is applied to conduct the calculation and numerical modeling and it is verified with CFD software.
It is very important to accurately master the law of gas leakage diffusion and express the distribution situation of gas leakage diffusion concentration field in the actual geographical space.Based on gradient theory and statistical theory of gas thermodynamics,dynamics and turbulence diffusion,this paper analyzes the infinite space instantaneous point source diffusion mode under static wind and considering lifting height of smoke,established the improved gas continuous leakage diffusion model of ground point-source under static wind by using the integral method of mobile puff.Also Matlab software is applied to conduct the calculation and numerical modeling and it is verified with CFD software.
引文
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[10]于明,狄彦,帅健.输气管道泄漏率计算与扩散模拟方法述评[J].管道技术与设备,2007(4):15-18.
[2]何争光.大气污染控制工程及应用实例[M].北京:化学工业出版社,2004.
[3]童志权.大气污染控制工程[M].北京:机械工业出版社,2006.
[4]宋新山,邓伟.环境数学模型[M].北京:科学出版社,2004.
[5]国家环境保护局.环境影响评价技术导则)))大气环境(HJ/T2.2)93)[S].北京:中国环境科学出版社,1994.
[6]陈超.Matlab应用实例精讲)))数学数值计算与统计分析篇[M].北京:电子工业出版社,2010.
[7]张甫仁.燃气管网系统安全性及仿真的理论分析与应用研究[D].天津:天津大学,2005.
[8]孟志鹏,王淑兰,丁信伟.可爆性气体泄漏扩散时均湍流场的数值模拟[J].安全与环境学报,2003(3):25-28.
[9]B Selma,R Bannari,P Proulx.A full integration of a dispersionand inter-face closures in the standard model of turbulence[J].Chemical Engineering Science,2010,65:5410-5428.
[10]于明,狄彦,帅健.输气管道泄漏率计算与扩散模拟方法述评[J].管道技术与设备,2007(4):15-18.