Noise control chevron for a nozzle, and nozzle and turboshaft engine provided with such a chevron

Abstract

According to the invention, the shape of each of said chevrons is defined: by two lateral sides (21, 22) having front ends (21A, 22A) that are connected to said nozzle (4, 10) and that, when moving away from the latter, converge towards each other without joining so that the rear ends (21R, 22R) of said lateral walls (21, 22) are spaced from each other; and by a curvilinear transverse line (23.1) connecting the rear ends (21R, 22R) of said lateral walls (21, 22) by forming two rounded side protrusions (24.1, 25.1 ) separated by an intermediate rounded recess (26.1).

Description

Anti-noise V-shaped trailing edges for exhaust nozzles, exhaust nozzles and turbine engines with such V-shaped trailing edges technical field The invention relates to a noise-resistant V-shaped trailing edge for a tailpipe of an aircraft turbine engine, as well as to a tailpipe with said V-shaped trailing edge and a turbine engine with at least one such tailpipe. Background technique We know that at the rear of the turbine engine, the jet from the turbine engine is in contact with at least one other air flow: in the case of a single-flow turbine engine, the jet is in contact with the ambient air, and in the case of a double-flow turbine engine In this case, the cold and hot currents are not only in contact with each other, but also with the ambient air. Since the speed of the jet stream ejected from the tail nozzle is different from the speed of other air flows encountered by the jet stream, fluid shear is caused when the streams enter each other, and the fluid shear will...

AI Technical Summary

Problems solved by technology

The known V-shaped trailing edge is generally effective for attenuating jet noise; however, it has the disadvantage of creating a lot of wake, especially in cruising flight

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