高压输气管道小孔与大孔泄漏模型的比较分析

Analysis of the Nozzle Model and Hole Model Associated with High-pressure Natural Gas Pipeline Leakage

分析了计算输气管道泄漏率的大孔模型和小孔模型的特点和差异,研究了两个模型的适用范围,得出在工程计算中应以泄漏孔的孔径与管径的比值(d/D)大小作为模型应用的条件,即:当d/D≤0.2时,使用小孔泄漏模型计算泄漏率简单、准确;当d/D>0.2时,则采用大孔泄漏模型。

This paper studies the characteristics and application conditions of the hole model and the nozzle model for natural gas pipeline leakage. The differences of the two models are also researched. It is suggested that the ratio of the diameter of hole to the diameter of pipeline （d/D） should be used as the criteria to select the appropriate model in the engineering application. When d/D≤0.2, it is convenient and accurate to calculate the release rate with nozzle model,and when d/D〉0.2,the hole model should be selected.