|
|
|
|
|
Oleksandr Kanifolskyi and Valerio Ruggiero
Usually, the need for research arises when there is a discrepancy between the theoretical and practical data. For example, the RINA (Registro Italiano Navale) Rules describe two navigation areas for yachts: unrestricted navigation and a navigation area w...
ver más
|
|
|
|
|
|
|
|
|
|
|
S. Polyzos and G. Tzabiras
The present work describes a simplified Computational Fluid Dynamics (CFD) approach in order to calculate the propulsive performance of a ship moving at steady forward speed in head seas. The proposed method combines experimental data concerning the adde...
ver más
|
|
|
|
|
|
|
|
|
|
|
Rasul Niazmand Bilandi, Simone Mancini, Luigi Vitiello, Salvatore Miranda and Maria De Carlini
In the current article, the hydrodynamic forces of single-stepped planing hulls were evaluated by an analytical method and compared against towing tank tests. Using the 2D + T theory, the pressure distribution over the wedge section entering the water an...
ver más
|
|
|
|
|
|
|
|
|
|
|
Rasul Niazmand Bilandi, Simone Mancini, Luigi Vitiello, Salvatore Miranda and Maria De Carlini
In the current article, the hydrodynamic forces of single-stepped planing hulls were evaluated by an analytical method and compared against towing tank tests. Using the 2D + T theory, the pressure distribution over the wedge section entering the water an...
ver más
|
|
|
|
|
|
|
|
|
|
|
Rasul Niazmand Bilandi, Simone Mancini, Luigi Vitiello, Salvatore Miranda and Maria De Carlini
In the current article, the hydrodynamic forces of single-stepped planing hulls were evaluated by an analytical method and compared against towing tank tests. Using the 2D + T theory, the pressure distribution over the wedge section entering the water an...
ver más
|
|
|
|
|
|
|
|
|
|
|
Jo?ko Parunov, Marta Pedi?ic-Buca, Inno Gatin and Ivan Catipovic
This paper deals with the resistance, towing, seakeeping, and open water propeller tests of an innovative tourist submarine model. Tests were performed in a 276 m long towing tank. As the submarine model is a complex structure composed of various parts a...
ver más
|
|
|
|
|
|
|
|
|
|
|
Daehan Lee, Sanggi Ko, Jongyeol Park, Yong Cheol Kwon, Shin Hyung Rhee, Myungjun Jeon and Tae Hyung Kim
The present study aims to reduce the pitch motion of an assault amphibious vehicle system in seaways by waterjet impeller revolution rate control. A series of seakeeping tests were performed in a towing tank with a 1/4.5-scale model. This vehicle is manu...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ivan Catipovic, Marta Pedi?ic-Buca and Jo?ko Parunov
An innovative tourist submarine was studied by scale-model tests in a towing tank to determine its steering capabilities and detect motion instabilities during usual manoeuvres and emergency rising. Motion instabilities are caused by the combination of t...
ver más
|
|
|
|
|
|
|
|
|
|
|
Vito Vasilis Zheku, Diego Villa, Benedetto Piaggio, Stefano Gaggero and Michele Viviani
During the early design stage of an underwater vehicle, the correct assessment of its manoeuvrability is a crucial task. Conducting experimental tests still has high costs, especially when dealing with small vehicles characterized by low available budget...
ver más
|
|
|
|
|
|
|
|
|
|
|
José Enrique Gutiérrez-Romero, Samuel Ruiz-Capel, Jerónimo Esteve-Pérez, Blas Zamora-Parra and Juan Pedro Luna-Abad
The real resistance that a ship must face when it is navigating in ice floes is the key factor for knowing the necessary power and the required engine size. The aim of this work is to provide valuable data to help other research in which numerical framew...
ver más
|
|
|
|
|
|
|
|
|
|
|
Filippo Cucinotta, Dario Mancini, Felice Sfravara and Francesco Tamburrino
The use of ventilated hulls is rapidly expanding. However, experimental and numerical analyses are still very limited, particularly for high-speed vessels and for stepped planing hulls. In this work, the authors present a comparison between towing tank t...
ver más
|
|
|
|
|
|
|
|
|
|
|
Wenyu Sun, Qiong Hu, Shiliang Hu, Jia Su, Jie Xu, Jinfang Wei and Guofu Huang
Accurate prediction of the self-propulsion performance is one of the most important factors for the 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 tan...
ver más
|
|
|
|
|
|
|
|
|
|
|
Da-Qing Li, Per Lindell and Sofia Werner
Unexpected low value of the relative rotative efficiency ?R is sometimes noted when scaling the towing tank model-test result with the ITTC-78 method to obtain the propulsive efficiency factors of propellers. The paper explains the causes of this phenome...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ana-Maria Chirosca, Antonio Medina, Florin Pacuraru, Simone Saettone, Liliana Rusu and Sandita Pacuraru
Reducing the added resistance in waves has become a crucial aspect of today?s ship design. The added resistance in waves is traditionally considered proportional to the square of wave height. However, this assumption is believed to be only partly valid, ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Francisco Pérez-Arribas, Arturo Silva-Campillo and Héctor Rubén Díaz-Ojeda
This paper presents the design and the experimental results of a new type of developable added bulbous bow that has been designated as a dihedral bow. This type of bow is based on polyhedral bows that are used in small vessels, whose origin is traced to ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Pál Schmitt, Song Fu, Ian Benson, Gavin Lavery, Stephanie Ordoñez-Sanchez, Carwyn Frost, Cameron Johnstone and Louise Kregting
Experimental testing of physical turbines, often at a smaller scale, is an essential tool for engineers to investigate fundamental design parameters such as power output and efficiency. Despite issues with scaling and blockage which are caused by limitat...
ver más
|
|
|
|
|
|
|
|
|
|
|
Zhizun Xu, Maryam Haroutunian, Alan J. Murphy, Jeff Neasham and Rose Norman
Underwater navigation presents crucial issues because of the rapid attenuation of electronic magnetic waves. The conventional underwater navigation methods are achieved by acoustic equipment, such as the ultra-short-baseline localisation systems and Dopp...
ver más
|
|
|
|
|
|
|
|
|
|
|
Pietro Casalone, Oronzo Dell?Edera, Beatrice Fenu, Giuseppe Giorgi, Sergej Antonello Sirigu and Giuliana Mattiazzo
The hydrodynamic investigation of a hull?s performance is a key aspect when designing a new prototype, especially when it comes to a competitive/racing environment. This paper purports to perform a fully nonlinear unsteady Reynolds Averaged Navier-Stokes...
ver más
|
|
|
|
|
|
|
|
|
|
|
Luca Savio, Lucia Sileo and Sigmund Kyrre Ås
Results of the fluid-structure co-simulations that were carried out as part of the FleksProp project are presented. The FleksProp project aims to establish better design procedures that take into account the hydroelastic behavior of marine propellers and...
ver más
|
|
|
|
|
|
|
|
|
|
|
Xifeng Gao, Zengwei Xu, Wanhai Xu and Ming He
Laboratory tests were carried out to investigate the cross-flow (CF) dynamic responses and hydrodynamic forces of a flexible pipe that subjected to vortex-induced vibration (VIV). The pipe had a critical mass ratio of 0.54 and an aspect ratio of 181.8. T...
ver más
|
|
|
|
|
|