The hull-waterjet interaction of a planing trimaran

Jiang, Jiabing; Ding, Jiangming

doi:10.1016/j.oceaneng.2020.108534

Cited by 13 publications

(3 citation statements)

References 11 publications

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“…It can be seen that the relative error between numerical and experimental results of bare hull resistance becomes larger with the increase in the ship's speed, which reaches 7.66% at Fr = 0.542 (design speed). Jiang and Ding [24] found that with the speed growth, the spray resistance became larger, its proportion to total resistance was also growing, and there was obvious water spray around the hull at high speeds in the model test. However, the VOF method cannot accurately capture the fluid spray in the numerical simulation, leading to relatively large differences between the numerical and experimental resistances.…”

Section: Resistance Calculations Of Bare Hullmentioning

confidence: 97%

“…Ji et al [23] studied the effect of improving the blade tip size in pump-jet propulsor through CFD numerical simulation. Jiang and Ding [24] studied the hull-waterjet interaction of a planning trimaran, including analysis of thrust deduction and interaction efficiency. They also conducted detailed investigations on the respective effect of waterjet suction and jet action on hull resistance with Froude Number, as well as the effect of hull displacement on the hydrodynamics for the same planning trimaran [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis on Self-Propulsion of a Waterjet-Propelled Ship with Different Propulsion Models

Zhang

Yang

2022

Applied Sciences

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The hydrodynamics of the waterjet-propelled ship is a challenging issue due to the sophistication of waterjet system geometry as well as waterjet–hull interaction. In current study, three different propulsion models, namely, multiple reference frame (MRF) model, sliding mesh model and body-force model, are utilized to simulate the self-propulsion of a waterjet-propelled ship model. A body-force model based on a User-Defined Function (UDF) on the ANSYS Fluent platform is proposed. The computational cost, wave pattern, jet stream surface, and self-propelled hull resistance of the MRF model and body-force model are compared. Comprehensive comparisons of the internal ingested flow field of the control volume are made, especially at the capture area and nozzle section, with the two different models. In addition, the resistance increment fraction and jet system thrust deduction fraction with the two different models are investigated. Lastly, the flow field with the steady MRF model, the body-force model (RANS) and the transient sliding mesh model (URANS) are compared.

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Section: Resistance Calculations Of Bare Hullmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Numerical Analysis on Self-Propulsion of a Waterjet-Propelled Ship with Different Propulsion Models

Zhang

Yang

2022

Applied Sciences

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“…Propellers working in certain environments may also experience cavitation (Duerr and Ellenrieder, 2015), which can significantly affect the propeller's performance and structure. When used in conjunction with hulls, the water jet propeller's internal flow field becomes even more complicated, and the propeller-hull interaction has unique characteristics (Terwisga, 1996;Jiang and Ding, 2021). A detailed study of the water jet propeller and its coupling with the hull is necessary to better EC 41,3 understand the characteristics of the device and the distribution of flow fields.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the performance of hull and water jet propeller under mooring conditions: effects of shallow water depths and varying inflow speeds

Zhang,

Hou,

Tao

2024

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PurposeWater jet propulsion is widely used in various military and civilian fields due to its advantages of simple structure and high propulsion efficiency. The process of mooring involves utilizing specially designed equipment to secure a ship at a designated berth. During the process of water jet propulsion, the single propeller operates within a complex and turbulent three-dimensional flow. Hence, studying the coupling between the water jet propeller and the hull is critical to comprehending the characteristics of the device and the distribution of the flow field in detail.Design/methodology/approachFirstly, we conducted computational fluid dynamics (CFD)-based self-propulsion calculations to evaluate the interaction between the hull and the propeller. We subsequently analyzed the propeller's performance and the forces acting on the hull to understand how the presence or absence of the hull influenced the water jet propeller. Finally, we performed calculations and analysis of the cavitation characteristics of the coupling between the hull and the water jet propeller, considering different rotational speeds and water depths at the bottom of the pool.FindingsThe study demonstrated that the presence of the hull boundary layer under the hull-propeller coupling condition led to reduced uniformity of propeller inlet flow and lower efficiency of the propulsion pump. However, it also increased the bias toward low-flow conditions. Additionally, increasing the impeller speed led to a gradual increase in the cavitation volume within the water jet propeller, resulting in a gradual decrease in the propeller's performance.Originality/valueThis research provides the technical support required for effective design and operation of water jet propulsion systems. This paper involves studying and analyzing the performance and flow field of the coupling between the hull and propeller under mooring conditions with a specified hull model.

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Experimental and numerical investigations into flow features in an intake duct for the waterjet propulsion under mooring conditions

Huang

Zhang²,

Wang

et al. 2021

Acta Mech. Sin.

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The hull-waterjet interaction of a planing trimaran

Cited by 13 publications

References 11 publications

Numerical Analysis on Self-Propulsion of a Waterjet-Propelled Ship with Different Propulsion Models

Numerical Analysis on Self-Propulsion of a Waterjet-Propelled Ship with Different Propulsion Models

Analyzing the performance of hull and water jet propeller under mooring conditions: effects of shallow water depths and varying inflow speeds

Experimental and numerical investigations into flow features in an intake duct for the waterjet propulsion under mooring conditions

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