发明公开
EP1115967A2 FAN NOISE REDUCTION FROM TURBOFAN ENGINES USING ADAPTIVE HERSCHEL-QUINCKE TUBES
有权
减速装置的噪声蜿蜒定制赫歇耳-昆克TUBES
- 专利标题： FAN NOISE REDUCTION FROM TURBOFAN ENGINES USING ADAPTIVE HERSCHEL-QUINCKE TUBES
- 专利标题（中）： 减速装置的噪声蜿蜒定制赫歇耳-昆克TUBES
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申请号： EP99964945.2申请日： 1999-09-16
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公开(公告)号： EP1115967A2公开(公告)日： 2001-07-18
- 发明人: BURDISSO, Ricardo , SMITH, Jerome P.
- 申请人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
- 申请人地址： Suite 1625,1872 Pratt Drive Blacksburg, VA 24060 US
- 专利权人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
- 当前专利权人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
- 当前专利权人地址： Suite 1625,1872 Pratt Drive Blacksburg, VA 24060 US
- 代理机构： Seaborn, George Stephen
- 优先权： US159634 19980924
- 国际公布： WO0020748 20000413
- 主分类号： F02K3/02
- IPC分类号： F02K3/02 ; F01N1/02
摘要：
An array of adaptive or fixed Herschel-Quincke tubes (1) aligned in a circumferential or helical array about an inlet (38) of a turbofan engine. The array of tubes effectively divide the acoustic energy generated by the engine. One of the energy components propagates within the tubes while the other propagates within the engine compartment. The acoustic energy within the tubes is reintroduced into the engine compartment to cancel the acoustic energy remaining in the engine as it propagates from the fan (36) towards the inlet and the outlet (34) openings.
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