Effect of waves on cavitation and pressure pulses
Artikel i vetenskaplig tidskrift, 2016

In view of environmental concerns, there is increasing demand to optimize the ships for the actual operating condition rather than for calm water. Now, in order to apply this for propeller design, a first step would be to study the effects of waves on propeller operation. Therefore, the aim of this paper is to identify and quantify the effect of various factors affecting the propeller in waves. The performance of KVLCC2 propeller in the presence of three different waves has been compared with calm water performance. Changes in performance in terms of cavitation, pressure pulses, and efficiency have been studied. Significant increase in pressure pulses has been observed due to wake change in waves even though cavitation did not show any significant change. An analysis using cavitation bucket diagram in different wave conditions indicates that a propeller optimized for calm water wake may perform much worse in the presence of waves. Therefore, having wake variation at least in critical wave conditions (where the wavelength is close to ship length) in addition to calm water wake could be very useful to ensure that the propeller performs equally well in the presence of waves.

Marine propeller

Cavitation

motions

Propeller performance in waves

kvlcc2

Pressure pulses

Propulsion in waves

Engineering

Oceanography

head waves

Författare

B. Taskar

Norges teknisk-naturvitenskapelige universitet

S. Steen

Norges teknisk-naturvitenskapelige universitet

Rickard Bensow

Chalmers, Sjöfart och marin teknik, Marin teknik

B. Schroder

Rolls-Royce PLC

Applied Ocean Research

0141-1187 (ISSN)

Vol. 60 61-74

Ämneskategorier

Vattenteknik

Etologi

Marin teknik

DOI

10.1016/j.apor.2016.08.009