Means for cooling exhaust nozzle sidewalls
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsTerry T. Eckert, Edward C. McDonough
Life of this patent
Estimating the term…
Abstract
A cooling arrangement for a gas turbine exhaust nozzle is provided which ludes a plurality of heat shield panels slidably positioned on tracks mounted on the nozzle casing. The panels are spaced apart to permit thermal expansion and include impingement baffles which are attached thereto intermediate the panels and the casing. Holes in the impingement baffles direct cooling air against the interior surface of the panels. The cooling air is directed by suitable means such as slots or film holes to form a film of cooling air along the surface of the panels exposed to hot gases.
Claims9
An exhaust nozzle sidewall heat shield and cooling means comprising:
- spaced heat shield means positioned over the nozzle sidewall portion exposed to high temperature gases;
- means included in said heat shield means for directing cooling air from areas in register with the sidewall portion to opposed surfaces of said heat shield means exposed to high temperature gases;
- and
- means secured to said nozzle and slidably receiving said heat shield means,
- said heat shield means exposed to high temperature exhaust gases secured to said nozzle at the forward end and allowed to expand longitudinally and transversely therefrom so as to avoid warping and distortion due to changing temperatures of the exhaust gases.
An expandable shield for protecting surfaces exposed to large temperature differentials such as in the exhaust nozzles of gas turbine engines comprising:
- heat shield means deployed on the nozzle sidewall and having an external area for collection and distribution of cooler air and an internal area for receiving and selectively releasing said cooler air along a surface directly exposed to exhaust gases,
- said heat shield means including an inner shield having a plurality of openings for diverting cooler air substantially perpendicular thereto and an outer shield having a plurality of openings for releasing the cooler air into the boundary layer on the surface of said shield means exposed to exhaust gases so that said inner shield is cooled by impingement cooling on one surface and film cooling on the opposite surface;
- and
- means secured to the nozzle sidewall for supporting said inner and outer shields in an arrangement which provides spacing so as to avoid warping and distortion of shield components.
Dependencies are inferred from the claim text.