FIELD: engines and pumps.
SUBSTANCE: gas outlet pipe of jet turbine engine includes central housing, primary and secondary fairings. Primary ring-shaped fairing coaxially envelopes the central housing, thus forming together with it the primary ring-shaped channel. Secondary fairing coaxially envelopes primary fairing, thus forming together with it the secondary ring-shaped channel located coaxially in relation to primary channel. Secondary fairing consists of fixed and movable parts; at that, as a result of movement of movable part the pipe section changes at gas outlet point and/or at neck location point in it. On fixed part of secondary fairing there is provided multiple projections continuing its rear edge in longitudinal direction. Outer surface of movable part of secondary fairing includes multiple cavities the shape of which complements the projections of fixed part. The other invention of the group refers to two-circuit gas turbine engine containing the above pipe.
EFFECT: inventions allow improving aerodynamic characteristics of nacelle of gas turbine engine and reducing acoustic emissions of gas outlet pipe.
4 cl, 3 dwg
