Numerical and experimental investigation of the means for reducing the aeroacoustic loads in an extended rectangular cavity at subsonic and transonic freestream velocities


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The results of a comprehensive investigation including numerical calculations and experiments with models in a wind tunnel and a vehicle under flight conditions aiming to find the ways of reducing the pressure fluctuation levels in an extended cavity at subsonic and transonic freestream velocities are presented. It is shown that the reduction of these loads can be achieved using the means which have demonstrated their effectiveness for cavities with the open-type flows, for example, a permeable deflector and the bevelling of the rear wall but only in the case of a given combination of their geometric parameters. The mechanisms of the action of these devices on the flow, thanks to which the intensity of the wave disturbances generated by the rear wall is reduced, the instability wave growth in the mixing layer behind the deflector is limited, and the fluctuation level in the cavity decreases, are investigated. The results of numerical investigations of the flow in a cavity with a permeable deflector are apparently among the first.

作者简介

R. Abdrashitov

Sukhoi Design Bureau

Email: station_112@mail.ru
俄罗斯联邦, ul. Polikarpova 23B, Moscow, 125284

E. Arkhireeva

Central Research Institute of Mechanical Engineering (TSNIIMASH)

Email: station_112@mail.ru
俄罗斯联邦, ul. Pionerskaya 4, Korolev, Moscow oblast, 141070

B. Dan’kov

Central Research Institute of Mechanical Engineering (TSNIIMASH)

Email: station_112@mail.ru
俄罗斯联邦, ul. Pionerskaya 4, Korolev, Moscow oblast, 141070

V. Korotaev

Sukhoi Design Bureau

Email: station_112@mail.ru
俄罗斯联邦, ul. Polikarpova 23B, Moscow, 125284

A. Kosenko

Central Research Institute of Mechanical Engineering (TSNIIMASH)

Email: station_112@mail.ru
俄罗斯联邦, ul. Pionerskaya 4, Korolev, Moscow oblast, 141070

O. Popov

Sukhoi Design Bureau

编辑信件的主要联系方式.
Email: station_112@mail.ru
俄罗斯联邦, ul. Polikarpova 23B, Moscow, 125284

O. Strel’tsov

Sukhoi Design Bureau

Email: station_112@mail.ru
俄罗斯联邦, ul. Polikarpova 23B, Moscow, 125284

I. Chuchkalov

Sukhoi Design Bureau

Email: station_112@mail.ru
俄罗斯联邦, ul. Polikarpova 23B, Moscow, 125284

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