Seabed scour induced by a propeller jet

Tan, Remziye Ilayda; Yüksel, Yalçın

doi:10.1016/j.oceaneng.2018.04.076

Cited by 34 publications

(23 citation statements)

References 9 publications

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“…Yew [15] used a co-rotating system to rotate the twin-propeller in the same direction, which is inconsistent with normal actual twin propeller ship systems. The predicted value is close to Tan & Yuksel [30], with 0.5% variation. The current experiments found that the maximum scour depth did not significantly change after two hours (7200 s).…”

Section: Comparisonsupporting

confidence: 70%

“…Stewart [19] proposed the conversion of the small-scale laboratory works to predict the efflux velocity of full-scale single-propeller. Mujal-Colilles et al [29] and Tan & Yuksel [30] emphasised the importance of maximum scour depth without consideration of the time factors.…”

Section: Implementation Of Equations On Full-scale Vesselmentioning

confidence: 99%

“…The prediction from the proposed equations is compared with the previous works from Hamill [5], Hong et al [9], Yew [15], Mujal-Colilles et al [29], and Tan & Yuksel [30]. The case of twin-propeller TE-1 was used in the comparison and Table 6 shows the predicted scour depth and variations.…”

Section: Comparisonmentioning

confidence: 99%

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Temporal Model for Ship Twin-Propeller Jet Induced Sandbed Scour

Cui

Lam

Zhang

et al. 2019

JMSE

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This research paper proposes the use of empirical equations to estimate the temporal maximum scour that is induced by twin-propeller ( ε t w i n = Ω t [ l n ( t ) ] Γ t ) when acting over non-cohesive bed materials. A purpose built experimental apparatus is used to obtain the measurement data required for the calculation of the empirical constants. The output from rigorous experimental investigations demonstrates that the maximum scour depth produced from the operation of twin-propeller ( ε t w i n ), within the confines of a harbour basin, varies as a logarithmic function of time. A dimensional analysis of the standard single propeller configuration is used as the foundation upon which the scour equation is postulated. This is extended to include the influence of the operating distance between the twin-propeller configurations for the first time. The division of scours by twin-propeller and single-propeller ( ε twin / ε m ) enables the establishment of mathematical relation to calculate C1, C2, A, and B. The constants are C 1 = 366.11, C 2 = 0.3376, A = 0.859, and B = 0.1571. The proposed scour equation is more reliable within the time zone up to two hours based on the experimental data.

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Section: Comparisonsupporting

confidence: 70%

Section: Implementation Of Equations On Full-scale Vesselmentioning

confidence: 99%

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Temporal Model for Ship Twin-Propeller Jet Induced Sandbed Scour

Cui

Lam

Zhang

et al. 2019

JMSE

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“…It may vary from time to time. In order to ensure that the TCT can work effectively all the time and avoid the scour effects due to propeller jet velocities [26] [27] and the negative impact of TCT on reducing scour pit depths [28] [29], the TCT will be suspended from a rotating platform, which can rotate around the monopile foundation of the OWT to ensure that the rotor plane of the TCT always faces the direction of the tidal current. The schematic diagram of the proposed technique is shown in Fig.2.…”

Section: Fundamental Mechanism Of the New Countermeasurementioning

confidence: 99%

A feasibility study of reducing scour around monopile foundation using a tidal current turbine

et al. 2021

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“…One of these risks is how the scouring effect on the seabed induced by ship propellers during ship arrival and departure manoeuvres near the harbour structures can affect their stability: Bergh & Magnussen, 1987;Chait, 1987;Fuehrer, Pohl, & Römish, 1987;Hamill, Johnston, & Stewart, 1999;Hamill, Ryan, & Johnston, 2009 studied the propeller scouring effects using experimental scenarios; Mujal-Colilles et al, 2017a compared and applied previous formulas to a real case. Latelly, Schokking, Janssen, & Verhagen, 2003;Symonds, Britton, Donald, & Loehr, 2017;Tan & Yüksel, 2018 were using both numerical and experimental methods to predict propeller scouring effects. When scour occurs, the eroded material is deposited in other areas of the harbour, affecting ship manoeuvring capabilities due to a significant reduction of the water column height.…”

mentioning

confidence: 99%

Alternative Manoeuvres to Reduce Ship Scour

Sanabra¹,

Mujal-Colilles²,

Marroig³

et al. 2020

J. Navigation

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Scouring and sedimentation effects on the seabed induced by ship propellers during ship manoeuvring near harbour structures affect both structure stability and ship manoeuvring capabilities. This contribution proposes solutions at an operational level using the automatic identification system (AIS) and a bridge simulator. Two new alternative manoeuvres were designed and tested on a bridge simulator to obtain expected maximum scour depth and the results were compared with that of real manoeuvres (i) using mooring lines, and (ii) with tug assistance. A total of 42 test scenarios combining several manoeuvres and meteorological conditions were reproduced. Results confirmed a clear reduction in erosion depth with the alternative manoeuvres, with total reduction when using the tugboat. The presented methodology can be very useful to port authorities to prevent the effects of ship erosion on harbour infrastructures.

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Seabed scour induced by a propeller jet

Cited by 34 publications

References 9 publications

Temporal Model for Ship Twin-Propeller Jet Induced Sandbed Scour

Temporal Model for Ship Twin-Propeller Jet Induced Sandbed Scour

A feasibility study of reducing scour around monopile foundation using a tidal current turbine

Alternative Manoeuvres to Reduce Ship Scour

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