### Features of subsonic air flow around perforated plates

**Published:**11.05.2020

**Authors:** Golubev A.G., Stolyarova E.G., Kalugina M.D.

**Published in issue: **#5(101)/2020

**DOI: **10.18698/2308-6033-2020-5-1980

**Category:** Aviation and Rocket-Space Engineering | **Chapter:** Aerodynamics and Heat Transfer Processes in Aircrafts

The paper considers the process of flow around a flat plate with rounded front and side edges at various degrees of surface perforation. The flow patterns were studied both near the plate with zero degree of perforation, and at the surface of plates with a perforation degree of more than 20%. The features of air flow directly inside the holes at various values of the angle of attack are considered. Isobars of pressure distribution in the vertical plane of the flow over a solid plate are given. A simulation of the flow around a perforated plate at subsonic speed of the incoming air flow is performed, aerodynamic characteristics are obtained and graphical dependencies of the aerodynamic coefficients of longitudinal and normal force on the angle of attack are presented. Special attention is paid to the comparative analysis of aerodynamic characteristics for solid (with zero degree of perforation) and perforated plates.

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