埋地管道在不同含水率的土壤中泄漏数值模拟

针对管道在土壤中发生泄漏问题,借助CFD软件及采用有限容积法建立土壤多孔介质中油气水三相流的流固耦合数学模型,分别模拟了管道在土壤含水率为0、0.1及0.2的三种情况下泄漏前后周围土壤温度场变化及油品在土壤中扩散分布情况。模拟结果表明:泄漏前,管道周围温度场分布相同,均呈椭圆形分布,热影响区温度由内向外逐渐降低。泄漏后,三种情况下,油品在土壤中运移趋势基本相同,但由于土壤含水率不同,管道周围温度场变化情况及相同时间内油品的泄漏量不同。

Numerical Simulation of Underground Pipeline Leakage in Soil With Different Moisture Content

In view of the problem of pipeline leakage in soil, the finite volume method was used to establish mathematical model of fluid-structure interaction of oil-gas-water in the soil as a kind of porous by CFD software. Under three conditions of the soil moisture contents of 0, 0.1 and 0.2, soil temperature field change and oil distribution range before and after the leakage were numerically simulated. The simulation results show that： before leakage, the temperature field is oval distribution around the pipeline, the temperature decreases from interior to exterior; After leakage, the oil migration trends in the soil are same, but due to the different soil moisture contents, the change of temperature field and leakage rate are not same at the same time under three conditions.