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Determination of optimum injection flow rate to achieve maximum micro bubble drag reduction in ships; An experimental approach

Sayyaadi, H ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.scient.2013.05.001
  3. Publisher: 2013
  4. Abstract:
  5. Reduction in ship resistance, in order to decrease fuel consumption and also achieve higher speeds, has been the topic of major research over the last three decades. One of the most attractive ideas in this field is micro bubble drag reduction, which attempts to obtain optimum injection flow rate based on ship specifications. The model test results of a 70 cm catamaran model was used to quantify the effect of air injection rate on drag reduction, and to estimate a simple formulation for calculating an efficient injection rate by considering the main parameters of the ship, such as: length, width and speed. The test results show that excessive air injection decreases the drag reduction effect, while suitable injection reduces total drag by about 5%-8%. © 2013 Sharif University of Technology. Production and hosting by Elsevier B.V. All rights reserved
  6. Keywords:
  7. Air injection ; Experimental approaches ; Injection flow rate ; Injection rates ; Main parameters ; Micro-bubble ; Reduction effects ; Ship resistances ; Drag reduction ; Flow rate ; Marine engineering ; Ships ; Decadal variation ; Experimental study ; Flow pattern ; Fuel consumption ; Optimization ; Ship design
  8. Source: Scientia Iranica ; Volume 20, Issue 3 , 2013 , Pages 535-541 ; 10263098 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1026309813000837