Abstract
Propeller research has generally been focussed on improving the open water efficiency, and by considering the various energy losses associated with the marine screw propeller, it can be seen that for a design brief with given main engine power and RPM input, plus a thrust requirement defined by the specified ship speed, the most fruitful area for improvement in efficiency by propeller design is a reduction in energy losses. The simple way to increase the efficiency is reduction of blade area, increase a load near the tip and larger diameter with low RPM. However, the vibration and noise will be the first obstacle thing when a designer tries to increase the efficiency of the propeller by these ways. This paper will present the simple prediction method of pressure fluctuations induced by thickness,
propeller loading and unsteady cavitation taking not only propeller dimensions but also stern shape in the beginning of propeller design stage.
propeller loading and unsteady cavitation taking not only propeller dimensions but also stern shape in the beginning of propeller design stage.
Original language | English |
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Pages | 1-6 |
Number of pages | 6 |
Publication status | Published - 7 Nov 2014 |
Event | 1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul - Istanbul, Turkey Duration: 6 Nov 2014 → 7 Nov 2014 |
Conference
Conference | 1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul |
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Country/Territory | Turkey |
City | Istanbul |
Period | 6/11/14 → 7/11/14 |
Keywords
- pressure fluctuations
- prediction method
- cavitation
- wake distributions near propeller
- propeller research
- vibration control