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Ciencia y Tecnologia de Buques     Open Access  
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Ciencia y Tecnologia de Buques
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1909-8642 - ISSN (Online) 2619-645X
Published by COTECMAR Homepage  [1 journal]
  • Editorial Note

    • Authors: Carlos Eduardo Gil de los Ríos
      Pages: 5 - 7
      PubDate: 2022-01-30
      Issue No: Vol. 15, No. 30 (2022)
       
  • Numerical simulation of a SEA Arrow Bow for a fishing vessel

    • Authors: Edgar S. Chávez Hipolito, Nain M. Ramos Álvarez, José L. Roggero Roggero
      Pages: 9 - 14
      Abstract: The hull designs of the Peruvian fishing fleet lack hydrodynamic studies, which is why, in the present work, a study of the resistance to the advance of a classical model of the type mentioned, called "MMS", is carried out. An experimental numerical correlation is carried out with this model to validate the proposed methodology. The numerical methodology uses CFD using Ansys-Fluent software, considering turbulent behaviour for a multiphase fluid (water-air), a mesh with inflation layers and refinements, among other characteristics. The results show a maximum error of 5% in relation to the results obtained experimentally. Based on this methodology, the behaviour of the adaptation of a SEA Arrow type bow to the MMS model is analysed. The results of this new proposal consider a decrease of up to 10% in the total resistance at different operating speeds.
      PubDate: 2022-01-30
      DOI: 10.25043/19098642.224
      Issue No: Vol. 15, No. 30 (2022)
       
  • Eletromechanical model of a based catamaran vessel

    • Authors: Laura María Núñez Álvarez, Juan Camilo Urbano Gómez, Juan Pablo Giraldo Grajales, Andrés David Wagner Arenas, Daniel Padierna Vanegas, Obed Pantoja Hernández, José Mauricio Jaramillo Pulgarín, Johan Gerardo Morales Barbosa, Daniel Padierna Vanegas
      Pages: 15 - 25
      Abstract: The objective of this research is to provide a tool that allows to quantify the power requirements, energy consumption and the efficiency of the propulsion system of a catamaran with two degrees of freedom according to its speed. Furthermore, it seeks to improve the design process from a phenomenological perspective that gives rise to a better reliability of the result. To achieve this, an electromechanical model is being developed by using the methodology for obtaining phenomenological-based semi-physical models. This model couples the dynamics of a geometry-known ship with its propulsion system, which is constituted by a propeller and a brushless direct current (BLDC) electric motor; at the same time, it uses data from computational simulations related to the hydrodynamics of the submerged components. Finally, the results of using the model with parameters of a specific catamaran and motor are presented. This model allows to properly couple the dynamics of a boat with two degrees of freedom.
      PubDate: 2022-01-30
      DOI: 10.25043/19098642.225
      Issue No: Vol. 15, No. 30 (2022)
       
  • Latam Shipbuilding Competitiveness

    • Authors: Raúl E. Podetti
      Pages: 27 - 36
      Abstract: After an introduction on the region’s shipbuilding industry, it moves into an analysis of some aspects of this industry’s competitiveness, comparing Latin American (LatAm) shipyards with those of other regions with more developed industries. Among the m se aspects are: productivity, learning curve, specialization, labor cost, delivery times and government policies. Second part deals with specific opportunities for domestic shipyards and ideas for developing their competitive advantages to generate value and social impact in the region, while safeguarding the environment. Six niches or opportunities are presented here, which are in all cases related to casting a new regard on Nature in our region. Nature being understood as the sum of natural resources, with the riches in fishery and offshore hydrocarbons standing out among them, but also those of the broad navigable rivers and lastly that of a privileged geographical position in terms of the extreme closeness to the Antarctic.
      PubDate: 2022-01-30
      DOI: 10.25043/19098642.226
      Issue No: Vol. 15, No. 30 (2022)
       
  • How to improve the shipbuilding industry with the Internet of ships
           concept

    • Authors: Rodrigo Pérez Fernández, Francisco J. Regueira
      Pages: 37 - 46
      Abstract: The goal of this research is to explain one of the most interesting technologies that exist today, Internet of Ships (IoS), the IoT applied to the maritime sector. This technology is an enabling of other existing within what is known as Industry 4.0, such as the digital twin, cloud calculations or augmented reality. Something as common as barcodes, were precursors of this technology and have been the cause of many stores have made the leap to smart tags, like RFID ones, which help them to perform both inventory and collection of things in the cashier, making that one jacket in the store an individual item in the collection of objects but perfectly controlled by the system. During the last years we have worked on implementing this transversal technology in the naval industry, and in this paper some examples will be shown.
      PubDate: 2022-01-30
      DOI: 10.25043/19098642.227
      Issue No: Vol. 15, No. 30 (2022)
       
  • Shallow Water Resistance Estimation for a Riverine Light Patrol Boat using
           Computational Fluid Dynamics

    • Authors: Nicolás Ruiz, Bharat Verma, Luís Leal, Mauricio García
      Pages: 47 - 57
      Abstract: For the design of naval ships, the operational environmental conditions in which ship navigation will take place must be taken into account. The present study presents the effect of shallow water on ship's drag. Numerical simulations using Computational Fluid Dynamics with the Star CCM+ Commercial Software has been performed for sea depths in which the BCFBC Shallow Draft River Combat Boat will perform operations. A full-scale validation campaign of the simulations with the built boat has been developed. The shallow water effect on ship total resistance and the residual resistance for different depths and speed has been evaluated.
      PubDate: 2022-01-30
      DOI: 10.25043/19098642.228
      Issue No: Vol. 15, No. 30 (2022)
       
 
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