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首页> 外文期刊>Engineering Technology and Applied Science Research >Impact of a Single Spoiler on Scouring Depth Status Beneath a River Crossing Inclined Pipeline
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Impact of a Single Spoiler on Scouring Depth Status Beneath a River Crossing Inclined Pipeline

机译：单个扰流板对过河倾斜管道下方冲刷深度状态的影响

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Deep river crossing pipelines utilized to carry fluids are often placed upon the sand bed. Placement of pipe on the non-smooth bed would result in the production of some local gaps beneath the pipe. Asymmetric scouring is one of the main reasons for pipe underwater failures which are significant in pipeline management. So, in designing pipelines, knowing the interaction between pipelines and bed, and predicting the scour depth with respect to the pipe distance from the bed is significant to ensure that the pipe will finally deposit on the bed. Numerical models have been developed for predicting the balance depth of scouring beneath the pipelines. In this paper, the impact of pipe orientation on maximum scour depth beneath the pipelines is investigated. To do this, a pipe is modeled with various angles with the flow. To manage the local scouring, some spoilers are placed and modeled upon some pipes too. Also, in order to know the effects of placement of a pipe at various distances from the bed, the impact of placement of each pipe at a distance of 0.2D, 0.4D and 0.6D is investigated as well. To model the pipe with and without a spoiler, the finite element model Flow-3D is utilized and the results show good accordance with previous experimental studies and proof the current model’s precision in predicting the scour depth. Results show that in the placement of the pipe in angles not investigated before and also with the installing of a spoiler, the scour process has a reverse ratio with the distance which would result in full deposition of the pipe on the bed. The least scour depth belongs to the condition in which the pipe has a 130° angle with the side wall.
机译：用于输送流体的深河过河管道通常放置在沙床上。将管道放置在不光滑的床上会导致在管道下方产生一些局部间隙。不对称冲刷是导致管道水下故障的主要原因之一，这在管道管理中非常重要。因此，在设计管线时，了解管线与床身之间的相互作用以及相对于距床身的管道距离预测冲刷深度对于确保管道最终沉积在床身上具有重要意义。已经开发了用于预测管道下方冲刷平衡深度的数值模型。本文研究了管道方向对管道下方最大冲刷深度的影响。为此，要对管道建模，使其具有与流动不同的角度。为了管理本地搜索，还放置了一些扰流板，并在一些管道上建模。同样，为了知道在离床不同距离处放置管道的影响，还研究了在0.2D，0.4D和0.6D距离处放置每个管道的影响。为了对带有或不带有扰流板的管道进行建模，使用了有限元模型Flow-3D，结果表明与先前的实验研究非常吻合，并证明了当前模型在预测冲刷深度方面的精度。结果表明，在以未曾研究过的角度放置管道以及安装扰流板时，冲刷过程与距离的比率相反，这将导致管道完全沉积在床上。最小冲刷深度属于管道与侧壁成130°角的条件。

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