|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||415/119 ; 181/212 ; ; 60/2261|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 26 인용 특허 : 5|
Noise attenuating linings for a turbofan engine inlet are installed around the upper crown area and/or around the lower lip. The acoustical lining at the upper crown area attenuates those fan noise emissions which are normally reflected from the crown area downward toward the ground. The acoustical lining at the lower inlet lip attenuates those fan noise emissions which travel along the inner surface of the lip and are diffracted around the lower lip downward toward the ground.
A method for reducing noise emissions from an inlet of a turbofan engine, the method comprising the steps of: a. installing noise attenuating material at a lower portion of the inlet having a lower leading edge; b. installing the noise attenuating material in a manner that it extends from the lower leading edge in a direction rearward along an inner surface of the lower inlet portion to a throat portion of the inlet; and c. installing the noise attentuating material in a manner that it extends from the lower leading edge in a direction rearward along an ...