Hydrodynamic Effects of the Length and Angle of the Ducted Propeller

  • Sohrab Majdfar Department of Marine Engineering, Imam Khomeini University, Nowshahr, Iran.
  • Hassan Ghassemi Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran.
  • Hamid Forouzan Department of Marine Engineering, Imam Khomeini University, Nowshahr, Iran.
DOI: http://dx.doi.org/10.36842/jomase.v25i1.434

Abstract

Ducted propellers used in many vessels, especially fishing vessels, trawlers and submarine which provide the higher efficiency. In this article, the effects of the duct length and duct angle are investigated on the hydrodynamic performance. First, did the modeling of duct 19A. The Kaplan propeller performance with nozzle 19A by turbulence model of SST-K-w analyzed and validated with experimental results that indicate acceptable accuracy. Finally, by changing the nozzle at a rate of 10% and 20% of the original length of the nozzle and also change the angle of the nozzle, analyzed the effects of the changes made. The Kaplan propeller with 19A nozzle is selected for case study. A Reynolds Average Navier-Stokes (RANS) turbulence model of the SST-K- w employed for the present calculations. Numerical results are included pressure distribution, hydrodynamic characteristics and velocity behind the propeller at various geometry and physical conditions. Comparisons of the results are shown with acceptable agreement by the experimental data. It is concluded that the position of the propeller and increasing the duct angle inside the duct may be limited.

##Keywords:## Ducted propeller, RANS, Hydrodynamic Characteristics.

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Published
Nov 30, 2015
How to Cite
MAJDFAR, Sohrab; GHASSEMI, Hassan; FOROUZAN, Hamid. Hydrodynamic Effects of the Length and Angle of the Ducted Propeller. Journal of Ocean, Mechanical and Aerospace -science and engineering-, [S.l.], v. 25, n. 1, p. 19-25, nov. 2015. ISSN 2527-6085. Available at: <https://isomase.org/Journals/index.php/jomase/article/view/434>. Date accessed: 22 june 2026. doi: http://dx.doi.org/10.36842/jomase.v25i1.434.
Citation Formats
Issue
Vol 25 No 1 (2015): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
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Articles

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