• Turkmen, Serkan
• Korkut, Emin
• Atlar, Mehmet
• Fitzsimmons, Patrick
• Aktas, Batuhan

Abstract

Theeffectofshaftinclination caninduce importantunsteady hydrodynamic phenomenon usually associated with small and high-speed craft. Thispaper presents systematic cavitation tunnel tests with a 214 mm diameter model propeller of a catamaran research vessel. Thepropeller is subjected to <br/>uniform and inclined flow conditions, to investigate itsefficiency,cavitation and underwater radiated noise characteristics. Theexperiments were conducted inthe Emerson Cavitation Tunnel ofNewcastle Uni- versity based onthe starboard 5-bladed right-hand propeller ofthe University's researchvessel, The Princess Royal.In thepaperthedetailsofthe tests and significant findings forthe effect ofthe shaft inclination onthe propeller efficiency,<br/>cavitation and underwater radiated noise characteristics are presented. A better understanding is sought inrelation to the noise signatures ofdifferent types of cavitation. Thesystematic tests presented inthe paper also have along-term objective, being the first of an organised roundrobin testcampaign thatisbeing currentlyundertakenbythemembers ofthe Underwater Noise Community of Practice (CoP)of Hydro-Testing Forum (HTF). Thislong-term <br/>objective is to repeat similar tests in the different facilities of all CoP members to reveal the relative merits of their testing facilities forunderwater noise investigations.<br/>

Topics

• impedance spectroscopy