Analyzing Cavitation in Marine Propeller: A Computational Approach with Consideration for Polymer Applications

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Year : 2024 | Volume : | : | Page : –
By
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Nikhil Babu P,

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T. J. S Jothi,

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Jaison Cletus,

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A.V. Ramesh Kumar,

  1. Research Scholar, Department of Mechanical Engineering, NIT Calicut, Kerala and Naval Physical and Oceanographic Laboratory (NPOL),Kochi, Kerala, India
  2. Associate Professor, Department of Mechanical Engineering, NIT Calicut, Kerala, India
  3. Scientist ‘E’, Naval Physical and Oceanographic Laboratory (NPOL),Kochi, Kerala, India
  4. Scientist ‘G’, Naval Physical and Oceanographic Laboratory (NPOL),Kochi, Kerala, India

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A major source of noise and blade damage in marine propellers is because of the phenomenon of hydrodynamic cavitation. The Computational Fluid Dynamics (CFD) analysis approach is employed for the prediction of the cavitating propeller’s performance characteristics under various conditions of operation with the advance coefficient (J) ranging from 0.55 to 0.91 and cavitation number (σ) in the range of 0.80 to 4.50. The numerical simulation is performed on INSEAN E779A propeller model with diameter, D = 0.227 m (radius, R = 0.1135 m). The results of torque coefficient (KQ), thrust coefficient (KT) and open water efficiency (η) are compared with open water characteristics and found that the relative error is ≤ 10% for KQ, and ≤ 15% in cases of KT and η. The vapor volume fraction and static pressure contours are employed to visualize the extent of cavitation. The maximum volume fraction distribution is observed to be 72% along the chord length of 0.7R. Similarly, the maximum velocity is found to be 42.5 m/s for the operating condition of J = 0.55 and σ =0.80. The determination of these maximum extends is performed in order to determine the areas on propeller surface for applying suitable polymer coatings for cavitation mitigation. Finally, from the acoustic analysis, it is identified that the Sound Pressure Level (SPL) is higher when the propeller operates at J = 0.55 and σ = 0.80. The average increase in the overall Sound Pressure Level (SPL) is 21.23 dB between the two extreme cases, (a) case 1: J = 0.91 and σ = 4.50, and (b) case 6: J = 0.55 and σ = 0.80.

Keywords: Marine propeller, Hydrodynamic cavitation, Propeller performance, INSEAN E779A, cavitation number, acoustic analysis, numerical simulation.

How to cite this article:
Nikhil Babu P, T. J. S Jothi, Jaison Cletus, A.V. Ramesh Kumar. Analyzing Cavitation in Marine Propeller: A Computational Approach with Consideration for Polymer Applications. Journal of Polymer and Composites. 2024; ():-.
How to cite this URL:
Nikhil Babu P, T. J. S Jothi, Jaison Cletus, A.V. Ramesh Kumar. Analyzing Cavitation in Marine Propeller: A Computational Approach with Consideration for Polymer Applications. Journal of Polymer and Composites. 2024; ():-. Available from: https://journals.stmjournals.com/jopc/article=2024/view=0


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Ahead of Print Open Access Original Research
Volume
Received 21/03/2024
Accepted 12/07/2024
Published 23/10/2024
198

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