Wall Pressure Fluctuations on the Surface of a Fairing in the Shape of a Semi-Ellipsoid and in its Vicinity

A. Yu. Golubev; Голубев А. Ю.; S. V. Kuznetsov; Кузнецов С. В.

doi:10.31857/S1024708423600227

Wall Pressure Fluctuations on the Surface of a Fairing in the Shape of a Semi-Ellipsoid and in its Vicinity

Authors: Golubev A.Y.¹, Kuznetsov S.V.¹
Affiliations:
1. Zhukovski Central Aerohydrodynamic Institute
Issue: No 6 (2023)
Pages: 75-85
Section: Articles
URL: https://rjmseer.com/1024-7084/article/view/672160
DOI: https://doi.org/10.31857/S1024708423600227
EDN: https://elibrary.ru/QKJXKW
ID: 672160

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Abstract

The wall pressure fluctuation fields on fairing surfaces and in the surrounding turbulent boundary layer are experimentally investigated. The fairings were in the shape of semi-ellipsoids and were mounted on the wall of a subsonic low-noise wind tunnel. Their heights amounted to 25% of the oncoming boundary layer thickness. The main physical features of the flows under consideration are determined by means of the surface oil-flow visualization. The fluctuating wall pressure field is compared with the flow pattern. It is shown that the greatest pressure fluctuation levels are recorded in the nose region of the fairing surface. It is established that lengthening the model leads to a considerable reduction of the pressure fluctuation strength in the region of flow separation from the fairing surface.

Keywords

pressure fluctuations, separation flow, turbulent boundary layer

About the authors

A. Yu. Golubev

Zhukovski Central Aerohydrodynamic Institute

Email: alexeygolubev@yandex.ru
140180, Moscow, Russia

S. V. Kuznetsov

Zhukovski Central Aerohydrodynamic Institute

Author for correspondence.
Email: international@yandex.ru
140180, Moscow, Russia

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