Local scour around two pipelines in tandem in steady current

Zhao, Ming; Vaidya, Shailesh; Kaja, Kalyani; Thapa, Jitendra

doi:10.1201/b17703-50

Cited by 2 publications

(3 citation statements)

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“…Westerhorstmann conducted the investigation using two pipelines in tandem, the results show that the gap ratio (G/D) has effect to the vortex shedding and scour process [4]. Then, Zhao simulated the gap ratio (G/D) from 0.5 -4 in interval 0.5 to investigate the effect of gap ratio to the scour depth and time scale [3]. It show that the scour around the upstream reach the equilibrium faster than the downstream.…”

Section: Literature Reviewmentioning

confidence: 99%

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Numerical Model for Prediction the Scour Depth around Two Pipelines in Tandem

Lasatira

Suntoyo

Armono

2017

AMM

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Scour around submarine pipelines is one of the factors that affecting their stability which need to be considered. There have been several experimental investigations on scour depth. Although many studies have been conducted to investigate scour below a single pipeline, the effects of the spacing between two pipelines on scour characteristics are not properly understood. This study is focused to investigate the effects of pipeline diameters (D), gap ratio (G/D) between the pipelines, and the Reynolds Number (Re) on the scour depth. Simulations are conducted for two pipelines with diameters 0.075 m and 0.1 m, where the gap ratio is , , and . In case the pipeline diameter, , it is found that the relative scour depth increases with increasing the gap ratio, where and are upstream and downstream pipeline diameters, respectively. Meanwhile, when , the scour depth decreases with decreasing the gap ratio. For the gap, , the scour depth is smaller than at the gap and due to the disturbance of the vortex shedding around the upstream pipeline.

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Section: Literature Reviewmentioning

confidence: 99%

“…Westerhorstmann investigated scour below two or three pipelines in tandem arrangement [2]. Zhao and Cheng studied scour below a piggyback pipeline with different diameters [3]. Some numerical models have been developed by Liang and Cheng for simulating scour process around the pipeline, however it was complex and takes a long time [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical Model for Prediction the Scour Depth around Two Pipelines in Tandem

Lasatira

Suntoyo

Armono

2017

AMM

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“…Mao [8], Sumer et al [9][10][11][12], Chiew [13][14][15], Neelamani and Rao [16], Yang et al [17], and Gao et al [18] mainly studied the local scour process and mechanism of submarine pipeline by establishing physical models. Van Beek and Wind [19], Zhao et al [20], and Liu et al [21] used numerical simulation methods to study the flow field changes, bed surface pressure distribution, and pipeline surface pressure distribution during the local scour process of submarine pipelines. In addition, with the development of new technologies, some new equipment and methods have also been applied to the study of pipeline scouring.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Local Scour and Related Mechanical Effects at River‐Crossing Underwater Oil and Gas Pipelines

Cui

Hao

et al. 2021

Advances in Civil Engineering

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Among the various geological disasters that threaten the safe operation of long-distance oil and gas pipelines, water-damage disasters are numerous and widely developed. Especially the pipelines crossing river channels or gullies are vulnerable to scouring hazards from storms and floods. A water-damage disaster physical model was established to investigate the characteristics of the riverbed scour profile and the pipeline force when the pipeline was buried at different depths under the condition of different particle size riverbed sediment. Results indicated that the equilibrium scour depth changed in a spoon shape with the gradual increase of the embedment ratio in general. The equilibrium scour depth formed by the fine sand riverbed was the largest, about 1.5 times the pipeline diameter. When the pipeline was half exposed, the clay riverbed was more resistant to the scour of the river than the riverbed of fine sand and very fine pebbles with a larger particle size. In the riverbed of three particle sizes, fine sand was more difficult to withstand the scour of the river. The scour profile formed by the sand bed around the pipeline and the force and deformation of the pipeline were related to pipeline location and riverbed sediment type. Results of this study might be useful for the safety warning and protection measures of underwater pipeline crossing.

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Local scour around two pipelines in tandem in steady current

Cited by 2 publications

References 0 publications

Numerical Model for Prediction the Scour Depth around Two Pipelines in Tandem

Numerical Model for Prediction the Scour Depth around Two Pipelines in Tandem

Experimental Study on Local Scour and Related Mechanical Effects at River‐Crossing Underwater Oil and Gas Pipelines

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