发明名称 |
Apparatus and method for suppressing sound in a gas turbine engine powerplant |
摘要 |
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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申请公布号 |
US5157916(A) |
申请公布日期 |
1992.10.27 |
申请号 |
US19900608510 |
申请日期 |
1990.11.02 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
WYNOSKY, THOMAS A.;MISCHKE, ROBERT J. |
分类号 |
F02K1/34;F02K1/38;F02K1/46;F02K1/48;F02K3/02 |
主分类号 |
F02K1/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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