In this paper, a series of analysis with finite element method was carried out varying hole shapes perforation as well plate dimensions. Eight different models about holes that number edges at the is four to infinite namely circular presented. Than analyze results these boundary conditions fixed supported and simply were compared. study it has shown when for infinite, in other words circular, m...

A cavitation bubble expanding and collapsing near a rigid boundary develops directed jet flow towards the boundary. In case of perforated plate, some passes through plate thus acts as pump transporting liquid from one side to opposite side. The transport is rather complex, time dependent varies with geometric parameters connecting channel. Therefore, we first model for large range then compare ...

In general, plates are classified as thick when the minimum dimension to thickness ratio (b/h) is less than 10, thin b/h ranges from 10 about 100, provided that plate maximum deflection (w/h) 0.2, and membranes approaches 100 w/h ≥ 0.2. Thick develop internal stress resultants governed by three-dimensio...

A Helmholtz resonator with a curved cavity is studied for reducing jet-installation noise in configuration comprised by subsonic jet and nearby flat plate. The face-sheet are designed the Guess method impedance verified through an experiment simulation of tube. Both single double degree-of-freedom liners, latter perforated septum inside cavity, studied. good agreement obtained curves from desig...

This paper presents the analysis, design, fabrication, and testing of a condenser microphone utilizing a thin low-stress polycrystalline silicon diaphragm suspended above a p+ perforated back plate. The microphone is fabricated using a combination of surface and bulk micromachining techniques in a single wafer process without the need of wafer bonding. The device shows sensitivities of -34 dB (...

Based on our previous work, we propose a homogenized model of acoustic waves propagating through periodically perforated elastic plates with metamaterial properties due to embedded arrays soft inclusions serving for resonators. Such structures enable suppress the transmission selected frequency bands. Homogenization vibro-acoustic fluid-structure interaction problem in 3D complex geometry layer...

Within the new generation of advanced central solar receivers, microchannel pressurised gas receivers are emerging as reliable and efficient alternatives to operate at high temperatures pressures. This paper presents an optimisation comparative analysis different compact plate-fin type structures, constituting receiver’s absorber panels, classified according fin arrangement inside: plain rectan...