中缅原油管道澜沧江跨越段原油泄漏扩散数值模拟

中缅原油管道澜沧江跨越段是整个中缅原油管道的“咽喉工程”,确保其安全运行显得尤为重要。在相对于澜沧江跨越段下游的二维河流地图轮廓基础上,建立了跨越段溢油事故下游河道的二维计算域。采用SST k-omega湍流模型,结合追踪多相流界面的VOF方法,针对澜沧江不同水期、不同泄漏位置、不同泄漏方式共12种泄漏工况分别进行了模拟计算;将12种泄漏工况下泄漏到澜沧江的原油量均按照最大泄漏量进行处理,分析了泄漏油品在江面的扩散情况、沿河流流向的扩散距离,得出不同影响因素下原油在澜沧江中的扩散规律。模拟结果对于现场预判原油扩散的位置以及围油栏的投放具有参考价值,可为澜沧江跨越段溢油事故的应急处置及环境保护提供有力的技术支持。

Numerical simulation of oil leakage and diffusion in the Lancang River crossing section of the China-Myanmar Crude Oil Pipeline

As Lancang River crossing is the“throat project”of the entire China-Myanmar Crude Oil Pipeline,it is very important to guarantee its safe operation.Based on the outline of the two-dimensional river map of the downstream of the Lancang River crossing section,a two-dimensional calculation domain for the downstream river course of the oil spill accident in the crossing section was established.Using the SST k-omega turbulence model and combined with the VOF method of tracking the multiphase flow interface,simulation calculations were performed for a total of 12 leakage scenarios of different river water periods,different leakage locations,and different leakage modes.In the 12 leakage scenarios,the amount of crude oil leakage in the Lancang River was considered as the maximum,the diffusion and distribution of crude oil on the surface of the river and the diffusion distance of the crude oil in the direction of the river were analyzed,and the migration and diffusion laws of crude oil in Lancang River with the influence of various factors were summarized.The simulation results are of strong reference significance for predicting the location of crude oil diffusion and the release of oil booms on site,and could provide strong technical support for emergency treatment of oil spills and environment protection in the Lancang River crossing section.