Helicopter gas turbine engine with sound level lowered by...

Details Helicopter gas turbine engine with sound level lowered by... Helicopter gas turbine engine with sound level lowered by...

2011-08-09

2011-08-09

Nguyen, Ninh H (Department: 3745)

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

C415S211200, C415S124100

Reexamination Certificate

active

07993099

ABSTRACT:
A helicopter gas turbine engine having a combustion chamber, at least one turbine arranged downstream from the combustion chamber to receive combustion gases emitted by the latter and a nozzle is disclosed. The nozzle has one part forming a diffuser, connected downstream from the turbine and an ejector which has an upstream part surrounding the downstream end of the diffuser and defining therewith an outlet passage for an engine compartment cooling air secondary flow, the ejector running in the downstream direction beyond the downstream end of the diffuser. The ejector has a wall formed at least partially by a sound attenuator calculated to attenuate sound frequencies generated by the rotation of the or each turbine and/or by the combustion chamber.

REFERENCES:
patent: 4001473 (1977-01-01), Cook
patent: 4433751 (1984-02-01), Bonneau
patent: 5127602 (1992-07-01), Batey et al.
patent: 5157916 (1992-10-01), Wynosky et al.
patent: 5592813 (1997-01-01), Webb
patent: 5947412 (1999-09-01), Berman
patent: 1 010 884 (2000-06-01), None
patent: 2 873 167 (2006-01-01), None
patent: 865 838 (1961-04-01), None
patent: 2 044 359 (1980-10-01), None
U.S. Appl. No. 11/854,915, filed Sep. 13, 2007, Baude.

Affiliated with

Also associated with

Rating

Helicopter gas turbine engine with sound level lowered by... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Helicopter gas turbine engine with sound level lowered by..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Helicopter gas turbine engine with sound level lowered by... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2666447