版权所有@2014 《油气储运》杂志社 冀ICP备号:0000000
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基于特征线法的天然气管道放空时间的计算
Characteristic method based calculation of venting time for natural gas pipeline
natural gas pipeline
; venting time; unsteady state calculation; characteristic line equation; explicit difference method天然气管道放空是压力、温度、气体流速都随时间变化的复杂过程,为准确计算长输管道天然气的放空时间,以放空管路为研究对象,建立非稳态的偏微分方程组,利用特征线方程将偏微分方程组转化为全微分方程组,并进行数值求解,计算出天然气管道放空所需时间.该方法的计算结果与工程实际中的管道放空数据吻合良好,可以较准确地计算长输天然气管道放空所需时间.
Venting of natural gas pipeline is a complex process with pressure, temperature and gas velocity varying with time. To correctly calculate the venting time of long-distance natural gas pipeline, the unsteady partial differential equations are established for venting lines. Then, these partial differential equations are transferred to total differential equations by characteristic line equation and solved to get the venting time of the natural gas pipeline. The calculation results of this method agree well with the venting line data in engineering practice, which indicates that this method can correctly calculate the venting time of natural gas pipeline.
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收稿日期:2013-12-10;改回日期:2014-9-17。
作者简介:刘英男, 工程师, 1962 年生, 1996 年毕业于中央党校经济管理专业, 现主要从事天然气管道的运行管理及天然气的销售工作.