Physics-Informed Acoustic Liner Optimization: Balancing Drag and Noise
AIAA Journal(2024)
摘要
We present pore-resolved Direct Numerical Simulations (DNS) of turbulent
flows grazing over acoustic liners with aerodynamically and/or acoustically
optimized orifice configurations. Our DNS explore a large parameter space,
studying various families of orifice geometries, including the influence of
orifice shape, orientation, and the number of orifices. All flow cases show an
increase in drag compared to the smooth wall. However, the added drag can be
reduced by as much as ∼55% as compared to conventional acoustic liners by
simply altering the shape of the orifice or its orientation, in the case of a
non-circular orifice. Complementary acoustic simulations demonstrate that this
reduced drag may be achieved while maintaining the same noise reduction
properties over a wide range of frequencies.
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