Sound absorbing apparatus for a supersonic jet propelling engine

Details Sound absorbing apparatus for a supersonic jet propelling engine Sound absorbing apparatus for a supersonic jet propelling engine

1995-09-11

1997-08-12

Casaregola, Louis J.

Power plants

Reaction motor

Including heat exchange means

2391273, 181222, F02K 138, F02K 144

Patent

active

056553617

ABSTRACT:
To reduce a noise and to cool a nozzle in a supersonic jet propelling engine, a sound absorbing member made of a porous plate (4) and a honeycomb structure (2) or a porous plate (4) and a torus core (3) is provided between a nozzle plate (5) and a liner (1), a cooling air (7) is caused to flow along an inner surface of the nozzle plate (5) and to impinge against the liner (1) through holes (10) of the porous plate (4). Furthermore, a number of holes (11) which are slanted on a rear side are formed in the liner (1) so that the cooling air (9) are injected through the holes (11).

REFERENCES:
patent: 4747543 (1988-05-01), Madden
patent: 5080284 (1992-01-01), Cires
patent: 5388765 (1995-02-01), Hill et al.

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