The Ffowcs Williams–Hawkings equation for hydroacoustic analysis of rotating blades. Part 1. The rotpole

What is it about?

Why and how a marine propeller generates noise underwater

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Why is it important?

The noise generated by propulsion devices based on rotating blades has been a relevant research topic in aeronautical industry for a long time. Then, many aspects of the problem are well known and have been taken for granted for hydroacoustic analysis of marine propellers too. Nevertheless, the source mechanisms occurring underwater are deeply different (compared to air) and the paper explains why, from both a physical and a mathematical point of view.

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