发明名称 |
Method and device for reducing the noise of turbo-machines |
摘要 |
A device for reducing the noise generated by the blades of at least one ring of rotor blades in a turbo-machine by the production of a counter-noise of opposed phase. This is achieved by injection of jets of fluid under pressure through orifices borne by the rotor located near to the periphery of the blades, and the flow of the fluid is modulated at a frequency which is a whole number multiple of the rotational frequency of the rotor shaft. Regulation of phase of the modulated injected fluid is carried out in such a manner that the acoustic waves generated by the injected fluid are substantially in opposition, with respect to phase, to those of the noise to be reduced.
|
申请公布号 |
US4199295(A) |
申请公布日期 |
1980.04.22 |
申请号 |
US19770849407 |
申请日期 |
1977.11.07 |
申请人 |
NAT ETUDE CONSTRUCTION MOTEURS AVIAT |
发明人 |
ANDRE, PIERRE A;GIRAULT, JEAN-PIERRE Y B;RAFFY, PIERRE M;RICHTER, GERHARD;THEVENIN, JEAN-CLAUDE P H P |
分类号 |
F02C7/045;F04D29/66;G10K11/175;(IPC1-7):F04D29/66 |
主分类号 |
F02C7/045 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|