COWL FOR NOZZLE OF GAS TURBINE ENGINE, WHICH CONTAINS TRIANGULAR ELEMENTS WITH DOUBLE TOPS FOR JET FLOW NOISE REDUCTION, NOZZLE OF GAS TURBINE ENGINE, AND GAS TURBINE ENGINE Russian patent published in 2011 - IPC F02K1/48 

FIELD: engines and pumps.

SUBSTANCE: annular cowl of nozzle of gas turbine engine includes shaped elements made as continued part of rear edge of cowl. Each shaped element has triangle-shaped contour with the base formed with the part of cowl rear edge, sides and two tops. Each top has curved contour and is connected to the other top by means of curved section with the curvature radius exceeding curvature radii of contour of the tops. Each side is adjacent to rear edge of cowl along the line of curved contour with curvature radius exceeding curvature radii of contour of the tops and exceeding the curvature radius of contour of curved section connecting the tops. Tops and curved section connecting them have a radial inclination inward the cowl in relation to its rear edge; at that, curved section connecting the above tops is offset radially outward in relation to the tops. The other inventions of the group refer to nozzle of gas turbine engine, which contains the above annular cowl, and to gas turbine engine including such nozzle.

EFFECT: inventions allow providing noise reduction of jet flow simultaneously at low and high frequencies.

5 cl, 5 dwg