摘要
基于一维混合模型研究天然气管道投产过程中气体的混合规律,利用Taylor、Taylor-CW、G.R.I 3种不同方法分别计算出气体扩散系数及投产过程中形成的天然气-氮气混气段长度,分析了管道置换过程中影响混气长度的主要因素,包括管长、管径及流速。由Taylor-CW方法计算出的结果与现场数据最为接近,用该方法验证国内3条已投产管道所得的相对误差分别为39.7%、23.4%、22.0%。
The gas diffusion coefficient and therefore gas-mixing section length was studied by using one-dimension mathematical model in combination with three different methods for calculating gas diffusion coefficient （Taylor ,Taylor-CW and G .R .I） .In addition ,the predominant factors in affecting the gas-mixing section length were also investigated ,including pipeline length ,diameter and velocity of the flow .And the comparison between the calculation results and field data show that Taylor-CW method can reflect the field practice better .The relative errors of the results for three domestic pipelines are 39.7% ,23 .4% and 22 .0% ,respectively .
出处
《石油化工高等学校学报》
CAS
2014年第1期84-89,共6页
Journal of Petrochemical Universities
基金
国家自然科学基金项目"油包水型乳状液蜡分子扩散和蜡晶颗粒沉积机理研究"(51374224)
关键词
天然气管道
氮气隔离
混气长度
现场对比
Natural gas pipeline
Nitrogen gas replacement
Gas-mixing section length
Data comparison
