管道技术与设备
管道技術與設備
관도기술여설비
Pipeline Technology and Equipment
2015年
5期
5-8
,共4页
高压管道%天然气%管道泄漏%气体扩散%CFD
高壓管道%天然氣%管道洩漏%氣體擴散%CFD
고압관도%천연기%관도설루%기체확산%CFD
high-pressure piping%natural gas%pipeline leakage%gas diffusion%CFD
为了降低天然气管道泄漏对环境造成的危害，采用FLUENT软件对高压天然气管道泄漏后甲烷扩散特性进行数值模拟，分别模拟了稳态及非稳态时甲烷浓度分布及速度分布情况；探究不同管道压力和外界风速对天然气泄漏扩散过程的影响，并通过速度分布图和甲烷浓度分布图分析天然气的扩散特性和区域。结果表明：管内压力越大，甲烷射流出口速度越大，甲烷扩散区域越大；风速越大，甲烷的偏转角度越大，在空气中扩散得越快。
為瞭降低天然氣管道洩漏對環境造成的危害，採用FLUENT軟件對高壓天然氣管道洩漏後甲烷擴散特性進行數值模擬，分彆模擬瞭穩態及非穩態時甲烷濃度分佈及速度分佈情況；探究不同管道壓力和外界風速對天然氣洩漏擴散過程的影響，併通過速度分佈圖和甲烷濃度分佈圖分析天然氣的擴散特性和區域。結果錶明：管內壓力越大，甲烷射流齣口速度越大，甲烷擴散區域越大；風速越大，甲烷的偏轉角度越大，在空氣中擴散得越快。
위료강저천연기관도설루대배경조성적위해，채용FLUENT연건대고압천연기관도설루후갑완확산특성진행수치모의，분별모의료은태급비은태시갑완농도분포급속도분포정황；탐구불동관도압력화외계풍속대천연기설루확산과정적영향，병통과속도분포도화갑완농도분포도분석천연기적확산특성화구역。결과표명：관내압력월대，갑완사류출구속도월대，갑완확산구역월대；풍속월대，갑완적편전각도월대，재공기중확산득월쾌。
With the objective of reducing the damages of pipeline gas leakage to the environment , numerical simulation on gas diffusion feature of high-pressure piping was performed with FLUENT .The methane concentration and velocity profile at the steady and unsteady state were simulated , respectively .The influences of tubing pressure and wind velocity on gas leakage were investiga -ted,and the gas diffusion feature and area of nature gas were analyzed via the velocity profiles and methane concentration profiles . The results show that the bigger the tubing pressure is , the larger the outlet velocity of jet flow is ,and the larger the diffusion area is.The bigger the wind velocity is, the larger the deflection angle is , the faster the gas diffusion rate is .
