Vibration control by propeller design

Lyn Bodger, Stephan Helman, Noriyuki Sasaki

Research output: Contribution to conferencePaper

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.

Conference

Conference1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul
CountryTurkey
CityIstanbul
Period6/11/147/11/14

Fingerprint

Vibration control
Propellers
Energy dissipation
Cavitation
Ships
Engines
Water

Keywords

  • pressure fluctuations
  • prediction method
  • cavitation
  • wake distributions near propeller
  • propeller research
  • vibration control

Cite this

Bodger, L., Helman, S., & Sasaki, N. (2014). Vibration control by propeller design. 1-6. Paper presented at 1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul, Istanbul, Turkey.
Bodger, Lyn ; Helman, Stephan ; Sasaki, Noriyuki. / Vibration control by propeller design. Paper presented at 1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul, Istanbul, Turkey.6 p.
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keywords = "pressure fluctuations, prediction method, cavitation, wake distributions near propeller, propeller research, vibration control",
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note = "1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul ; Conference date: 06-11-2014 Through 07-11-2014",

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Bodger, L, Helman, S & Sasaki, N 2014, 'Vibration control by propeller design' Paper presented at 1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul, Istanbul, Turkey, 6/11/14 - 7/11/14, pp. 1-6.

Vibration control by propeller design. / Bodger, Lyn ; Helman, Stephan; Sasaki, Noriyuki.

2014. 1-6 Paper presented at 1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul, Istanbul, Turkey.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Vibration control by propeller design

AU - Bodger, Lyn

AU - Helman, Stephan

AU - Sasaki, Noriyuki

PY - 2014/11/7

Y1 - 2014/11/7

N2 - 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.

AB - 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.

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Bodger L, Helman S, Sasaki N. Vibration control by propeller design. 2014. Paper presented at 1st International meeting on Propeller Noise and Vibration Odabasi Colloquium, 2014 Istanbul, Istanbul, Turkey.