COWL FOR NOZZLE OF GAS TURBINE ENGINE, WHICH CONTAINS TRIANGULAR ELEMENTS WITH POINT OF CURVATURE FOR JET FLOW NOISE REDUCTION, NOZZLE OF GAS TURBINE ENGINE, AND GAS TURBINE ENGINE Russian patent published in 2011 - IPC F02K1/46 

FIELD: engines and pumps.

SUBSTANCE: ring cowl of gas turbine engine nozzle includes many shaped elements made in continued part of rear edge of cowl and located from each other in circumferential direction. Each shaped element has circuit mainly of triangular shape with the base formed with some part of rear edge of cowl and the apex located downstream of the base and connected to it by means of two sides. Apex has mainly curved outline for each shaped element. Each side is adjacent to rear edge of cowl along the line mainly of curved outline with radius of curvature, which exceeds or equals to radius of curvature of the apex outline. Outline of each of the sides includes at least one curvature point with a tangent essentially parallel to the base. The other invention of the group refers to nozzle of gas turbine engine, which contains primary cowl made around longitudinal axis of nozzle and secondary cowl made concentrically around primary cowl; at that, primary and/or secondary cowls are made as specified above. One more invention refers to gas turbine engine containing nozzle with the cowl made as above.

EFFECT: inventions allow reducing jet flow noise at low and high frequencies.

7 cl, 5 dwg