Journal ArticleDOI
Study on the design of propeller blade sections using the optimization algorithm
Yoshihisa Takekoshi,Takafumi Kawamura,Hajime Yamaguchi,Masatsugu Maeda,Norio Ishii,Koyu Kimura,Tadashi Taketani,Akihiko Fujii +7 more
TLDR
In this article, a vortex lattice method is used to evaluate the performance and the time-dependent pressure distribution on the blade surface in a non-uniform flow, while efficient optimization algorithms are used to modify the blade sections.Abstract:
A new method for designing propeller blade sections is presented. A vortex lattice method is used to evaluate the performance and the time-dependent pressure distribution on the blade surface in a non-uniform flow, while efficient optimization algorithms are used to modify the blade sections. Two different designs were carried out in this study. The first was a design to realize a target pressure distribution in a rotating three-dimensional flow. A two-dimensional wing theory was used to obtain the target pressure distribution. The predicted increase in efficiency and the reduction in the cavity volume were confirmed by model experiments. The second was a design to maximize the propeller efficiency. By this method, the propeller efficiency was improved by 1.2% under the constrains of constant thrust and a prescribed margin for face cavitation.read more
Citations
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Journal ArticleDOI
Multidisciplinary design optimization: A survey of architectures
TL;DR: This paper provides a survey of all the architectures that have been presented in the literature so far, using a unified description that includes optimization problem statements, diagrams, and detailed algorithms.
Journal ArticleDOI
Sixty years of research on ship rudders: Effects of design choices on rudder performance
Jialun Liu,Robert Hekkenberg +1 more
TL;DR: In this paper, the authors present a consolidated review of design impacts on rudder performance in ship manoeuvrability, fuel consumption, and cavitation, and provide recommendations for industry practices in the selection of the rudder design choices.
Cavitation simulation on marine propellers
TL;DR: In this paper, hydrodynamic and numerical characteristics of several cavitation models developed for a viscous flow solver are investigated, and one of the models is verified for the cavitation simulation on marine propellers.
DissertationDOI
Simulation based design for high speed sea lift with waterjets by high fidelity URANS approach
Journal ArticleDOI
Design of propeller geometry using streamline-adapted blade sections
TL;DR: In this article, the authors refine the geometry of a propeller by modifying the blade sections to align them with surface streamlines, obtained by the panel method, together with a surface modeling scheme by which model propellers were built.
References
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Journal ArticleDOI
An SQP method for general nonlinear programs using only equality constrained subproblems
TL;DR: A new version of a sequential equality constrained quadratic programming method for general nonlinear programs with mixed equality and inequality constraints is described, which is much simpler to implement and allows any kind of changes of the working set in every step.
Journal ArticleDOI
A new technique for inconsistent QP problems in the SQP method
TL;DR: Numerical results are reported which show that this technique for regularizing inconsistent QP problems, combined with a special method for the case of regular subproblems, is quite competitive to highly appreciated established ones.
Journal ArticleDOI
On the mechanism of the bursting phenomena of propeller tip vortex cavitation
Akihisa Konno,Kazuaki Wakabayashi,Hajime Yamaguchi,Masatsugu Maeda,Norio Ishii,Shunji Soejima,Koyu Kimura +6 more
TL;DR: In this paper, the bursting phenomenon of tip vortex cavitation of a propeller sometimes causes severe high-frequency vibration, but its mechanism has not yet been elucidated, and two means were suggested to suppress the burst phenomenon, other than changing the wake distribution: stabilizing tip vortex cavity or reducing the cavity volume.
Journal ArticleDOI
Application of a numerical optimization technique to the design of cavitating propellers in nonuniform flow
TL;DR: In this paper, a numerical nonlinear optimization algorithm is developed for the automated, systematic design of cavitating blades in uniform flow and non-uniform flow, respectively, by using a cubic B-spline polygon net to define the blade mean camber surface.