An extensive analysis of numerical ship self-propulsion prediction via a coupled BEM/RANS approach

Gaggero, Stefano; Villa, Diego; Viviani, Michele

doi:10.1016/j.apor.2017.05.005

Cited by 56 publications

(26 citation statements)

References 17 publications

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“…StarCCM+ is a general-purpose finite volume code widely used to solve naval problems. In the last several decades, it has been successfully applied to address several naval problems, ranging from simple cases such as the prediction of the hull resistance [24,25] or the numerical evaluation of the propeller performance [26], to complex interaction problems like rudder-propeller [27], self-propulsion estimations [28,29], or the prediction of ship maneuver characteristics [30]. Regarding applications directly related to the prediction of propeller performance, this code has demonstrated its accuracy in different conditions: with a spatial homogeneous wake [31] (i.e., in open water conditions), with inclined shaft [32], and in behind hull conditions, including cavitation [33].…”

Section: Numerical Methodologymentioning

confidence: 99%

Numerical and Experimental Comparison of Ducted and Non-Ducted Propellers

Villa

Gaggero

Tani

et al. 2020

JMSE

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Ducted propellers are unconventional systems that are usually adopted for ship propulsion. These devices have recently been studied with medium-fidelity computational fluid dynamics code (based on the potential flow hypothesis) with promising results. However, these tools, even though they provide a good prediction of the forces and moments generated by the blades and the duct, are not able to provide insight into the flow field characteristics due to their crude flow approximations. On the contrary, modern high-fidelity viscous-based computational fluid dynamics codes could give a better description of the near and far-field flow of these particular devices. In the present paper, forces and the most significant features of the flow field around two ducted propellers are analyzed by means of both experimental and computational fluid dynamics approaches. In particular, accelerating and decelerating ducts are considered, and we demonstrate the ability of the adopted solver to accurately predict the performance and the flow field for both types. These results, in particular for the less-studied decelerating duct, designate CFD as a useful tool for reliable designs.

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Section: Numerical Methodologymentioning

confidence: 99%

Numerical and Experimental Comparison of Ducted and Non-Ducted Propellers

Villa

Gaggero

Tani

et al. 2020

JMSE

Self Cite

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“…13, is shown in Figure 15 (b).The resultant value of R is relatively higher with VOF method. Traditionally, the effect of free surface treatment on R is assumed negligible when performing the self-propulsion balance [27] for cases in design draft.…”

Section: Self-propulsion Balance Conditionmentioning

confidence: 99%

“…These approaches are certainly time-consuming due to the large discrepancy between propeller rotation period and ship's traveling wave period. The later ones introduced Actuator Disk Method or Body Force Method to simulate the effect of propeller rotation, many attempts such as momentum theory [29], Boundary Element Method [10] [27] or Optimal Circulation Lifting Line Theory [20] [32] are performed to produce propeller's body force in ship wake. Free surface treatment is another important issue in simulating the self-propulsion.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Full-scale Ship Self-Propulsion Performance with direct Comparison to Statistical Sea Trail Results

Sun¹,

Hu²,

Hu³

et al. 2019

Preprint

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Accurate prediction of the self-propulsion performance is one of the most important factors for energy-efficient design of a ship. In general, the hydrodynamic performance of a full-scale ship could be achieved by model-scale simulation or towing tank test with extrapolations. With the development of CFD methods and computing power, directly predict ship performance with full-scale CFD is an important approach. In this article, a numerical study on the full-scale self-propulsion performance with propeller operating behind ship at model- and full-scale is presented. The study includes numerical simulations using RANS method with double-model and VOF model respectively and scale effect analysis based on overall performance, local flow fields and detailed vortex identification. Verification study on grid convergence is also performed for full-scale simulation with global and local mesh refinements. And a series of sea trail tests were performed to collect reliable data for the validation of CFD predictions. The analysis of scale effect on hull-propeller interaction shows that the difference on hull boundary layer and flow separation is the main source of scale effect on ship wake. And the results of the fluctuations of propeller thrust and torque along with circulation distribution and local flow field show that propeller’s loading is significantly higher for model-scale ship. It is suggested that the difference on vortex evolution and interaction is more pronounced and have larger effects on ship’s powering performance at model-scale than full-scale according to the simulation results. From the study on self-propulsion prediction, it could be concluded that the simplification on free surface treatment does not only affect the wave-making resistance for bare hull but also the propeller performance and propeller induced ship resistance which can produced up to 5% uncertainty to the power prediction. Roughness is another important factor in full-scale simulation because it has up to approximately 7% effect on the delivery power. As a result of validation study, the numerical simulations of full-scale ship self-propulsion shows good agreement with the sea trail data especially for cases that have considered both roughness and free surface effects. This result will largely enhance our confidence to apply full-scale simulation in the prediction of ship’s self-propulsion performance in the future ship designs.

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“…One of the most powerful tools in modern management is the controlling that provides comprehensive coordination and control over performance effectiveness. In addition to modern crisis factors, agribusiness has to respond to new global challenges related to supporting food security at the accelerated growth in population [1]. Maintaining food security by means of controlling implies sustainable intensification of agricultural sector with minimal impact on the natural environment and compliance with the norms of population rational nutrition [2].…”

Section: Introductionmentioning

confidence: 99%

“…In the process of designing any CPC SPP, including the control system (CS), various types of models at different stages are employed. Initially, if it is possible, analytical models for control problems are compiled, for example, in the form of systems of differential equations or logical-algebraic expressions [1]. Then the algorithms are selected that make it possible to bring solutions to the problems to numerical values.…”

Section: Introductionmentioning

confidence: 99%

Theoretical-applied aspects of the composition of regression models for combined propulsion complexes based on data of experimental research

Budashko

Golikov

2017

EEJET

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На підставі вивчення властивостей компо-нентів суднових енергетичних установок (СЕУ) комбінованих пропульсивних комплексів (КПК) і особливостей побудови рівнянь, що характеризу-ють енергетичні процеси у конкретній СЕУ кон-кретного КПК, були розроблені принципи побу-дови їхніх регресійних емпіричних моделей із визначенням функції зв'язку вхідних змінних із вихідною за даними експериментальних випробу-вань. Зроблено перевірку адекватності отриманої моделі із розрахунком відповідних критеріїв Ключові слова: суднова енергетична установ-ка, комбінований пропульсивний комплекс, регре-сійне моделювання, оцінка адекватності, експери-ментальні випробування На основании изучения свойств компонентов судовых энергетических установок (СЭУ) ком-бинированных пропульсивних комплексов (КПК) и особенностей построения уравнений, характе-ризующих энергетические процессы в конкретной СЭУ конкретного КПК, были разработаны прин-ципы построения их регрессионных эмпирических моделей с определением функции связи входных переменных со входной по данным эксперимен-тальных исследований. Выполнена проверка адек-ватности полученной модели с расчетом соот-ветствующих критериев Ключевые слова: судовая энергетическая уста-новка, комбинированный пропульсивный ком-плекс, регрессионное моделирование, оценка адек-ватности, экспериментальные испытания UDC 629.56:064.5+620.9+629.5

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An extensive analysis of numerical ship self-propulsion prediction via a coupled BEM/RANS approach

Cited by 56 publications

References 17 publications

Numerical and Experimental Comparison of Ducted and Non-Ducted Propellers

Numerical and Experimental Comparison of Ducted and Non-Ducted Propellers

Numerical Analysis of Full-scale Ship Self-Propulsion Performance with direct Comparison to Statistical Sea Trail Results

Theoretical-applied aspects of the composition of regression models for combined propulsion complexes based on data of experimental research

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