|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||244/001N ; 244/017.11 ; 244/017.13 ; 244/199 ; 244/207|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 22 인용 특허 : 9|
An active control device for reducing high-speed impulsive ("HSI") and blade vortex interaction ("BVI") noise in a rotor aircraft, such as a helicopter, is disclosed. The system comprises a plurality of rotor blades extending radially in spaced relationship from a central hub, each of the blades having spaced apart upper and lower surfaces, an interior volume between the surfaces, and leading and trailing edges at the respective joined edges of the upper and lower surfaces. Air intake passages are disposed on the surfaces of each blade proximate the lead...
[ What is claimed:] [1.]1. A system for reducing high speed impulsive blade noise (HSI) in aircraft rotors, the system comprising:a plurality of rotor blades extending radially in spaced relationship from a central hub, each of said blades having spaced apart upper and lower surfaces, an interior volume between said surfaces, and leading and trailing edge portions at respective opposing joined edges of said upper and lower surfaces of each blade;air intake passages disposed on the upper and lower surfaces of each blade proximate the leading edge and tip ...