|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B64C-021/02 B64C-009/14 B64C-009/22|
|미국특허분류(USC)||244/1N ; 244/204 ; 244/210|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 14 인용 특허 : 0|
Acoustic noise resulting from the interaction of a periodic pressure and velocity fluctuation induced by a periodically passing blade wake interacting with a downstream airfoil (10)is attenuated by locating an antisymmetric pressure wave generator (30) adjacent the leading edge (18) of the vane (10).
In an airfoil having a pressure surface, a suction surface, a leading edge and a chordal dimension, and wherein said airfoil is subject to a flow of fluid over said surfaces, said fluid flow defining a regularly fluctuating pressure and flow field, and wherein the interaction of said airfoil and said fluid flow results in the generation of acoustic noise having a characteristic frequency and wavelength, the improvement comprising wherein said airfoil includes means disposed adjacent the leading edge of said airfoil, for generating an antisymmetric period...