Rotary kinetic fluid motors or pumps – With sound or vibratory wave absorbing or preventing means...
Patent
1977-12-27
1981-03-10
Casaregola, Louis J.
Rotary kinetic fluid motors or pumps
With sound or vibratory wave absorbing or preventing means...
181206, 60226R, F01D 510, F01D 526
Patent
active
042550831
ABSTRACT:
A method and device for reducing the noise produced in a turbo-machine by e interaction of the blades of a ring of rotor blades and the vanes of a ring of stator vanes by the creation of a counter-noise of opposed phase. This is achieved by the injection of a fluid into the flow passage of the machine in which the blades and vanes are located. The injection is carried out through orifices located on stationary parts of the machine and equal in number to the vanes of rings of stator vanes, the flow through the orifices being modulated at the frequency of the noise to be reduced and with a phase difference which increases in an incremental manner from one orifice to the next. The phase of the modulated flows injected through the orifices is simultaneously regulated so that the acoustic waves created by the flows are substantially in opposition, with respect to phase, to those of the noise to be reduced.
REFERENCES:
patent: 3693749 (1972-09-01), Motsinger et al.
patent: 3936606 (1976-02-01), Wanke
patent: 3951566 (1976-04-01), Mattei et al.
patent: 4044203 (1977-08-01), Swinbanks
Andre Pierre A.
Girault Jean-Pierre Y. B.
Richter Gerhard
Thevenin Jean-Claude P. H. P.
Casaregola Louis J.
Societe Nationale D'Etude Et De Construction De Moteurs D'Aviati
LandOfFree
Method and device for reducing the noise of turbo-machines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for reducing the noise of turbo-machines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for reducing the noise of turbo-machines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1291956