Emerging topics in aeroacoustics: Interdisciplinary perspectives

Recent studies on use of drone self-noise for improved control algorithms and sound generated by flapping flight of insects are presented in dedication. The flapping flight studies encompasses experimental and computational investigations of invasive insect species Coconut Rhinoceros Beetle (Oryctes rhinoceros) and the Oriental Flower Beetle (Protaetia orientalis). Three dimensional, unsteady flow simulations were conducted using compressible flow software (CAESIM, Adaptive Research, Inc.) with a TVD methodology. Flapping wing motion uses mesh deformation with a rotation with a prescribed bending coupled to rotation and translation of the wing’s hinge position. Sound generation by trailing edge and tip vortices is discussed with respect to second harmonic sounds. Benchmarks and validations of sound propagation are highlighted.