TURBOMACHINE NOZZLE COWL HAVING JET NOISE REDUCTION PATTERNS
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United States of America Patent
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N/A
Issued Date -
Apr 2, 2009
app pub date -
Sep 15, 2008
filing date -
Sep 28, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a cowl for a turbomachine nozzle, the cowl including a plurality of repetitive patterns disposed to extend a trailing edge of said cowl and spaced circumferentially apart from one another. Each pattern is in the form of a quadrilateral having a base that is formed by a portion of the trailing edge of the cowl and two vertices that are spaced downstream from the base and that are connected thereto via two sides, each side having the shape of a parabola. Each pattern is asymmetrical relative to a midplane of the pattern containing a longitudinal axis of said cowl, and it comprises a first portion inclined radially towards the inside of the cowl, and a second portion inclined radially towards the outside of the cowl.
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