高压天然气输送管道断裂过程中气体减压波速的计算  

Calculation of high-pressure natural gas decompression wave velocity during pipeline fracture

作　　者：陈福来[1,2] 帅健[1] 冯耀荣[3] 庄传晶[3] 

机构地区：[1]中国石油大学机电工程学院,北京102249 [2]中国石油天然气勘探开发公司,北京100034 [3]中国石油天然气集团公司管材研究所,陕西西安710065

出　　处：《中国石油大学学报（自然科学版）》2009年第4期130-135,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油天然气集团公司项目

摘　　要：管道断裂过程中减压波速的计算是输气管道断裂控制的关键问题。考虑到小直径管道非等熵效应较为显著,分别建立了求解减压波速的等熵理论模型和非等熵理论模型,通过推导将求解流体参数的偏微分方程组转化为全微分方程组。基于P-R状态方程,推导了热力学参数的计算公式。应用三特征线法求解气体减压波速,并开发了相应的计算程序,分析了起始压力、起始温度、不同气体介质和管径对气体减压波速的影响。结果表明:热力学参数计算公式计算的比热容比、压缩因子与试验值的平均相对偏差分别为0.617%,0.555%;程序计算的多组分气体减压波速与全尺寸爆破试验测量值相吻合。Solution of decompression wave velocity during pipeline fracture is the key problem in fracture control of natural gas transportation pipeline. Considering that the.non-isentropic effect of small-diameter pipeline is obvious, the isentropic and the non-isentropic theoretical models were created respectively. Through deducing, the set of partial differential equations was inverted to the set of ordinary differential equations. Using P-R state equation, the calculation formulas for calculating compression factor and specific heat ratio were derived. Gas decompression wave velocity during the pipeline fracture process was solved by the three-characteristic line method, and the corresponding computer program was developed. The results show that the average relative deviation of the calculated value of specific heat ratio and its experimental value is 0. 617%, and the average difi^rence of the compression factor is 0. 555%. The gas decompression wave velocity calculated agrees well with the measured data of full scale burst test. The influences of initial pressure, initial temperature, gas composition and diameter of pipeline on gas decompression wave velocity were analyzed.

关 键 词：管道断裂 理论模型 减压波速 三特征线法 试验验证 

分 类 号：TE832[石油与天然气工程—油气储运工程]