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首页> 外文会议>International Conference on Ocean, Offshore and Arctic Engineering >NUMERICAL INVESTIGATION OF SCOUR BENEATH A SUBSEA PIGGYBACK PIPELINE
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NUMERICAL INVESTIGATION OF SCOUR BENEATH A SUBSEA PIGGYBACK PIPELINE

机译：海底背驮式管道下缝的数值调查

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摘要

In present study, two-dimensional numerical simulations have been carried out to investigate scour beneath a piggyback pipeline subjected to a subsea boundary layer flow using SedFoam (an open-source multi-dimensional Eulerian two-phase solver for sediment transport based on OpenFOAM). In the piggyback configuration, a small pipeline is attached on the upstream and downstream sides of a large pipeline. This form of piggyback can reduce the scour depth beneath the pipeline (Yang et al., 2019). In the solver, the turbulence Reynolds stress is resolved using a two-phase modified k-ε model. The particle stresses caused by the binary collisions and contacts are modeled by the kinetic theory for granular flow and a phenomenological frictional model, respectively. The effects of the locations of the small pipelines attached on the large pipeline on the scour and the surrounding flow field are discussed.
机译：在目前的研究中，已经进行了二维数值模拟，以研究使用SEDFOAM（基于OpenFoam的沉积物传输的沉积物传输的开源多维欧拉两阶段求解器，对肩扛管线下面的冲击管道下面的冲刷。在肩扛配置中，一个小型管道安装在大型管道的上游和下游侧。这种形式的背驮式可以减少管道下方的冲刷深度（杨等，2019）。在求解器中，使用两相修改的K-ε模型来解析湍流雷诺应力。由二元碰撞和触点引起的粒子应力分别由粒状流动和现象学摩擦模型进行建模。讨论了附着在浅滩上的大管道上的小管道的位置和周围流场的影响。

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