Porous panels with fixed ends lose stability by divergence

Hajian, Rozhin; Jaworski, Justin

doi:10.1016/j.jfluidstructs.2019.102823

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…The model developed by Howe was later used by Jaworski and Peake 9 to analyze the trailing edge noise from a semi-infinite plate with a porous surface. They determined that the porosity affected the trailing edge noise differently at different non-dimensional frequencies and specified their results in terms of a frequency dependent Mach number scaling.…”

Section: Introductionmentioning

confidence: 99%

Acoustic transmission loss and noise from Kevlar wind tunnel walls

Glegg

Szőke

Devenport

2022

International Journal of Aeroacoustics

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In this paper we will develop a model for the acoustic transmission loss and self-noise generated by a Kevlar wind tunnel wall. It is shown that the porosity of the fabric is the most important controlling factor of the transmission loss, and the effect of wind tunnel flow speed is to increase the losses, as observed in experiments. In addition, a model is developed for the weave noise generated by a Kevlar wind tunnel wall, which is found to be caused by the pumping of the fluid through the pores in the Kevlar and depends on their open area ratio. The mechanism for this sound generation is similar to the roughness noise mechanism for a turbulent boundary layer in that the pore spacing couples with the small wavelength disturbances in the boundary layer to cause acoustic radiation at the sum and difference frequencies.

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Section: Introductionmentioning

confidence: 99%

Acoustic transmission loss and noise from Kevlar wind tunnel walls

Glegg

Szőke

Devenport

2022

International Journal of Aeroacoustics

View full text Add to dashboard Cite

show abstract

“…An analytical expression for the unsteady pressure distribution was presented and evaluated for the special cases of uniform and variable-porosity panels undergoing harmonic deformations, where the effect of the panel end conditions was also investigated. Subsequent research used these unsteady loads to show generally that the primary instability of porous panels with fixed ends is aeroelastic divergence (Hajian & Jaworski 2020).…”

Section: Introductionmentioning

confidence: 99%