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  1. Home
  2. Indian Institute of Technology Madras
  3. Publication3
  4. Parametric CFD investigation of ALS technique on reduction in drag of bulk carrier
 
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Parametric CFD investigation of ALS technique on reduction in drag of bulk carrier

Date Issued
20-04-2020
Author(s)
Sindagi, Sudhir
Vijayakumar, R. 
Indian Institute of Technology, Madras
Saxena, B. K.
DOI
10.1080/17445302.2019.1661617
Abstract
Development has been made in the field of Naval Architecture to enhance the fuel efficiency of ships by using techniques which reduces pressure drag at higher speeds. However, for slower moving vessels, the major concern is higher percentage of frictional drag. It is well-known fact that, frictional drag depends on the wetted surface area of a ship, viscosity and density of fluid flowing around it. Applications to change the viscosity and/or density and/or wetted surface area of the ship is need of an hour. In the Air lubrication system technique, alteration of above is possible by injecting air bubbles below the hull. In this study, numerical investigations into frictional drag reduction by injection of air bubbles were carried out in Star CCM+ for a 1:23 scaled model of a Bulk Carrier for two speeds and for different air injection rates using different diameters of series of injection holes.
Volume
15
Subjects
  • air lubrication syste...

  • ALS

  • BDR

  • Bubble drag reduction...

  • frictional drag reduc...

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