|
|||||
|
|
| 高压管道天然气泄漏扩散过程的数值模拟 | |
| 引用本文： | 董刚,唐维维,杜春,杨君涛,于彦飞.高压管道天然气泄漏扩散过程的数值模拟[J].中国安全生产科学技术,2009,5(6):11-15. |
| 作者姓名： | 董刚 唐维维 杜春 杨君涛 于彦飞 |
| 作者单位： | 1. 南京理工大学瞬态物理国家重点实验室,南京,210094 2. 南京理工大学化工学院,南京,210094 3. 上海天然气管网有限公司,上海,201204 4. 公安部上海消防研究所,上海,200438 |
| 基金项目： | 上海市科学技术委员会资助项目 |
| 摘 要： | 采用CFD模型的方法对高压管道内的天然气泄漏和扩散过程进行了数值模拟。其结果表明，从高压管道泄出的天然气在大气中主要表现为高速射流的泄漏过程和随后的扩散过程。在泄漏过程中，天然气在泄漏口附近为欠膨胀射流，整个泄漏过程具有一定的高度；在扩散过程中，天然气在浮力作用下以向上扩散的形式发展。研究了不同环境风速对扩散过程的影响，较大的风速可以使天然气向下风方向更远的距离扩散，从而增大了天然气爆炸危险浓度的范围。研究结果可 |
| 关 键 词： | 泄漏扩散 天然气 高压管道 数值模拟 |
Numerical simulations of release and dispersion process from high-pressure natural gas pipeline |
|
| DONG Gang,TANG Wei-wei,DU Chun,YANG Jun-tao,YU Yan-fei.Numerical simulations of release and dispersion process from high-pressure natural gas pipeline[J].Journal of Safety Science and Technology,2009,5(6):11-15. | |
| Authors: | DONG Gang TANG Wei-wei DU Chun YANG Jun-tao YU Yan-fei |
| Institution: | DONG Gang , TANG Wei-wei, DU Chun, YANG Jun-tao, YU Yan-fei ( 1. National Key Laboratory of Science and Technology on Ballistics, Nanjing University of Science and Technology, Nanjing 210094, China;2. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;3. Shanghai Natural Gas Pipeline Network Company, Ltd. , Shanghai 201204, China;4. Shanghai Fire Research Institute, Shanghai 200438, China) |
| Abstract: | The numerical simulations of release and dispersion for natural gas from high-pressure pipeline were performed by using CFD modeling. The results show that the gas flow vented from high-pressure includes high-speed jet process and subsequent dispersion process. For the jet process, an under-expansion jet occurs near the release hole, the whole jet maintains the considerable height. For the dispersion process, the gas disperses upward due to the buoyancy effect. The effect of wind speed on the natural gas dispersion was examined, it is shown that the higher wind speed can transport the gas farther along the downwind direction and increase the hazardous region of explosion concentration limit. The studies can provide the available foundation for the people evacuation and the safety management in the scene of natural gas release. |
| Keywords: | release and diffusion natural gas high-pressure pipeline numerical simulation |
| 本文献已被 维普 万方数据 等数据库收录！ | |