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1.发明授权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
公开(公告)号：EP1115967B1
公开(公告)日：2006-11-15
申请号：EP99964945.2
申请日：1999-09-16
CPC分类号： B64D33/02 , B64D2033/0206 , B64D2033/0286 , F02C7/045 , F04D29/663 , F05D2260/96 , F05D2260/962 , G10K11/175 , Y02T50/671
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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2.发明公开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
公开(公告)号：EP1115967A2
公开(公告)日：2001-07-18
申请号：EP99964945.2
申请日：1999-09-16
CPC分类号： B64D33/02 , B64D2033/0206 , B64D2033/0286 , F02C7/045 , F04D29/663 , F05D2260/96 , F05D2260/962 , G10K11/175 , Y02T50/671
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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