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首页> 外文期刊>Journal of Cleaner Production >A method for fast simulating the liquid seepage-diffusion process coupled with internal flow after leaking from buried pipelines
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A method for fast simulating the liquid seepage-diffusion process coupled with internal flow after leaking from buried pipelines

机译：从地下管道泄漏后快速模拟渗流扩散过程与内部流动耦合的方法

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Once the oil pipeline leakage accident occurs, it is of great significance to predict the leakage volume and the diffusion range of leaked oil accurately and efficiently in order to reduce the contamination degree and formulate the environmental impact assessment and repair scheme. In this paper, a prediction model of leakage intensity of leaked oil and seepage-diffusion range in soil is proposed. Firstly, the entire leakage process inside and outside of buried product oil pipeline is simulated, including the process of pipe flow, orifice outflow, and seepage-diffusion, and thus the model of seepage-diffusion of oil in soil is established. Secondly, the coupling solution of seepage-diffusion in soil both before and after the transient pipe flow being terminated is accomplished via interactively transmitting the key parameters between the pipe flow and the seepage-diffusion process. Thirdly, the comparison of simulated data with experiment results proves that the flow-seepage-diffusion coupled model has better applicability and a higher accuracy in acquiring the severity, quantity, and range of the leakage. Finally, the effects of pressure transmission coefficient, leak orifice's size, leakage flowrate, pipe diameter, leak orifice's position, pipe depth, and diffusion resistance are systematically analyzed. Thus, the characteristics of dynamic seepage-diffusion of leaked oil in porous soil are investigated, which provides an important basis and technical support for pipeline accident treatment. (C) 2019 Elsevier Ltd. All rights reserved.
机译：一旦发生输油管道泄漏事故，准确有效地预测泄漏油的泄漏量和扩散范围，对于降低污染程度，制定环境影响评价与修复方案具有重要意义。提出了渗漏油渗漏强度与土壤渗流范围的预测模型。首先，模拟了地下成品油管道内外渗漏的全过程，包括管道流动，孔口流出，渗流扩散等过程，建立了土壤中油渗漏扩散模型。其次，通过在管道流与渗流过程之间交互传递关键参数，实现了在瞬态管道流终止之前和之后土壤中渗流扩散的耦合解。第三，将模拟数据与实验结果进行比较，证明渗流扩散耦合模型在获取泄漏的严重程度，数量和范围方面具有较好的适用性和较高的准确性。最后，系统地分析了压力传递系数，泄漏孔尺寸，泄漏流量，管道直径，泄漏孔位置，管道深度和扩散阻力的影响。因此，研究渗漏油在多孔土壤中的动态渗流扩散特性，为管道事故处理提供了重要的依据和技术支持。 （C）2019 Elsevier Ltd.保留所有权利。

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