摘要
由于城镇燃气管道泄漏量的估算较为复杂,所以目前还没有比较简化的计算公式。为推算出燃气直接泄漏到大气中的泄漏量简化公式,根据城镇燃气管道的实际运行压力,利用小孔模型和管道(断裂)模型估算燃气泄漏量,推算出管道燃气临界体积流量以对泄漏量校核,并将天然气管道泄漏量进行演算。由此可知,小孔模型燃气的泄漏量和泄漏瞬间提升的浓度仅与管内流动的燃气压力和泄漏口的大小有关,而管道(断裂)模型燃气的泄漏量和泄漏瞬间提升的浓度与管道直径、管内流动的燃气压力和管道入口到泄漏口的上游长度都有关系。
To calculate gas-pipeline leakage is so complicated. So far, there is no simplified equation for it. In this study, based on the actual pressure of pipeline,we obtained leakage by pinhole and pipeline(fracture)models, estimated critical-volume flow rate to check the leakage,and calculated pipeline leakage. Result shows that for pinhole model,the leakage and concen tration increasing at the leaking moment are relevant to both gas pressure in pipe and size of the leak hole only. For pipeline(fracture)model,the two are relevant to pipe diameter,gas pressure and length between inlet and leak hole.
出处
《天然气技术与经济》
2012年第1期50-53,79,共4页
Natural Gas Technology and Economy
