|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 9 인용 특허 : 0|
A method and apparatus for jet noise suppression through control of the static pressure of the jet and control of the rate of entrainment of ambient fluid into the jet downstream of the exhaust nozzle is disclosed and serving to regulate the momentum flux over an extended region of the jet, affecting Reynolds stresses in the jet and the spreading angle of the jet. Static pressure is controlled through a long hollow, porous nozzle plug centerbody which may be selectively vented to ambient conditions, connected to a vacuum source, or supplied with fluids o...
A method of directing the sound in a jet comprising the steps of: (a) providing a jet exhaust nozzle; (b) providing a porous centerbody internally along the entire nozzle length with a portion thereof extending rearward from the exhaust nozzle and downstream in the jet; (c) injecting a cryogenic fluid coolant through the porous centerbody into the jet thereby; (d) creating a heat sink along the jet extending downstream of the exhaust nozzle whereby the heat sink will attract acoustical energy in the jet and channel the jet noise in the direction of the h...