Power plants – Reaction motor – Method of operation
Patent
1990-11-02
1992-10-27
Bertsch, Richard A.
Power plants
Reaction motor
Method of operation
602261, 60264, F02K 302
Patent
active
051579162
ABSTRACT:
A method and apparatus for suppressing jet noise in a gas turbine engine powerplant 10 is disclosed. Various construction details are developed for providing sound suppression at sea level take-off operative conditions and not providing sound suppression at cruise operative conditions. In one embodiment, the powerplant 10 has a lobed mixer 152 between a primary flowpath 44 and a second flowpath 46, a diffusion region downstream of the lobed mixer region (first mixing region 76), and a deployable ejector/mixer 176 in the diffusion region which forms a second mixing region 78 having a diffusion flowpath 72 downstream of the ejector/mixer and sound absorbing structure 18 bounding the flowpath throughout the diffusion region. The method includes deploying the ejector/mixer 176 at take-off and stowing the ejector/mixer at cruise.
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Mischke Robert J.
Wynosky Thomas A.
Bertsch Richard A.
Fleischhauer Gene D.
Kocharov Michael I.
United Technologies Corporation
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