Design and analysis of a new generation of CLT propellers

Gaggero, Stefano; González-Adalid, J.; Sobrino, Mariano

doi:10.1016/j.apor.2016.06.014

Cited by 57 publications

(25 citation statements)

References 14 publications

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“…The optimisation algorithms were compared in terms of optimisation convergence, constraints compliance and Pareto optimality. Based on experimental data and numerical results, Gaggero et al [12] devised an Technical Editor: Jose A. R. Parise.…”

Section: Introductionmentioning

confidence: 99%

Marine propeller parametric optimisation and matching to electric motor

Marques

Belchior

Caprace

2019

J Braz. Soc. Mech. Sci. Eng.

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There is still room to establish a methodology to optimise marine propellers, considering design requirements of the vessel, and match it to an electric motor. The method proposed herein consists in an optimisation whose objective function is power required in the electric motor shaft, and design variables are the parameters of Wageningen B-screw series propellers. A differential evolution optimisation algorithm was programmed in MATLAB environment to assess a number of propeller designs. Technical constraints of strength, cavitation, and peripheral velocity were considered. An actual ferryboat designed to operate in a lake in southeastern Brazil is proposed as the case study. The worst individual of the final population of propellers had its objective function increased by 25%, compared with the worst individual of the initial population, within only 123 s processing time. Substantially dissimilar propeller designs were found for direct and geared drive with open water propeller efficiency between 36.18 and 40.49%. The approach has shown significant gains as an early-stage design tool and highlighted the need for exploring a broad range of propellers to find the optimal motor-propeller matching.

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Section: Introductionmentioning

confidence: 99%

Marine propeller parametric optimisation and matching to electric motor

Marques

Belchior

Caprace

2019

J Braz. Soc. Mech. Sci. Eng.

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“…The advantages of hull optimization and related devices optimization (such as propellers and hydrofoils) have been demonstrated by several authors. Many design optimization approaches have been used in the design of traditional propellers [1,2], unconventional propulsion systems [3,4], appendages [5], and the optimization of the entire hull shape [6,7]. Recently, a lot of development has been done on the design of unconventional vessels with special mission profiles, from the standard mono-hull shapes [8,9], to unconventional multi-hulls [10,11], or hulls with special shapes, such as the Small Waterplane Area Twin Hull or SWAT [12].…”

Section: Introductionmentioning

confidence: 99%

Surrogate-Based Optimization Using an Open-Source Framework: The Bulbous Bow Shape Optimization Case

Guerrero

Cominetti

Pralits

et al. 2018

MCA

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Shape optimization is a very time-consuming and expensive task, especially if experimental tests need to be performed. To overcome the challenges of geometry optimization, the industry is increasingly relying on numerical simulations. These kinds of problems typically involve the interaction of three main applications: a solid modeler, a multi-physics solver, and an optimizer. In this manuscript, we present a shape optimization work-flow entirely based on open-source tools; it is fault tolerant and software agnostic, allows for asynchronous simulations, and has a high degree of automation. To demonstrate the usability and flexibility of the proposed methodology, we tested it in a practical case related to the naval industry, where we aimed at optimizing the shape of a bulbous bow in order to minimize the hydrodynamic resistance. As design variables, we considered the protrusion and immersion of the bulbous bow, and we used surrogate-based optimization. From the results presented, a non-negligible resistance reduction is obtainable using the proposed work-flow and optimization strategy.

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“…The endplates also prevents the flow on the face of the blades from escaping radially outwards (Gennaro, 2006). Several CFD studies have been completed into CLT propellers however they all use structured meshing (Gaggero et al, 2016b;Bertetta et al, 2012;Gaggero et al, 2016a;Brown et al, 2014) and managed to simulate open water tests with reasonable accuracy compared with experimental test data.…”

Section: Introductionmentioning

confidence: 99%

An investigation into contracted loaded tip propellers using computational fluid dynamics (CFD)

Williams

2018

Proceedings of the International Naval Engineering Conference and Exhibition (INEC)

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This paper investigates the potential performance improvements of adding contracted loaded tips to propellers. A Wageningen B5-75 Series propeller has been simulated and verified against published experimental test data. Contracted tips have then been added to a Wageningen propeller and the modified propeller then simulated. A CFD method and model has been developed. Pressure, velocity and vector plots have all been analysed detailing the mechanism behind the contracted tips. Limitations behind this method have been explored and explained, and recommendations for further studies made. The development of a database of propeller characteristics and performance chart data to allow quick evaluation of designs has also been proposed.

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Design and analysis of a new generation of CLT propellers

Cited by 57 publications

References 14 publications

Marine propeller parametric optimisation and matching to electric motor

Marine propeller parametric optimisation and matching to electric motor

Surrogate-Based Optimization Using an Open-Source Framework: The Bulbous Bow Shape Optimization Case

An investigation into contracted loaded tip propellers using computational fluid dynamics (CFD)

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