|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||415/119; 415/914; 415/115; 415/1731|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 43 인용 특허 : 8|
Existing pressure oscillations created by axial or centrifugal fans in a diverging shroud are utilized to power a passive, acoustic jet, the nozzle of which directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, or a duct, the fluid particles in the resonant chamber of the passive acoustic jet being replenished with low momentum flux particles drawn from the fluid flow in a direction normal to the surface, thereby to provide a net time averaged flow of increased momentum flux particles to defe...
1. A fluid flow system, comprising:a fluid flow path having a surface and a stream of fluid flowing within said path, said fluid flow having a boundary layer adjacent said surface, said fluid flow having oscillatory pressure fluctuations; a passive acoustic chamber disposed near said surface; and a fluid passage interconnecting said chamber with said fluid flow path at a small acute angle with respect to said surface, said chamber and said passage forming a resonant, passive acoustic jet of which said passage forms a nozzle, the resonant frequency of sai...