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Updated: Jul 30, 2025

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Published on: February 13, 2018
On the noise generation and unsteady performance of combined heaving and pitching foils
Nathan Wagenhoffer1, Keith W Moored2, Justin W Jaworski3
1Computer Science and Engineering, Penn State Abington, Abington, PA 19001, United States of America.
Abstract:
A transient two-dimensional acoustic boundary element solver is coupled to a potential flow boundary element solver via Powell's acoustic analogy to determine the acoustic emission of isolated hydrofoils performing biologically-inspired motions. The flow-acoustic boundary element framework is validated against experimental and asymptotic solutions for the noise produced by canonical vortex-body interactions. The numerical framework then characterizes the noise production of an oscillating foil, which is a simple representation of a fish caudal fin. A rigid NACA 0012 hydrofoil is subjected to combined heaving and pitching motions for Strouhal numbers (0.03
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