APU Exhaust Housing Perforated Ring
AssigneeUnited Technologies Corporation
InventorsJon Szymanski, Farooq Rehman, Ara J. Hovhannisian, Anthony C. Jones
Life of this patent
Estimating the term…
Abstract
According to one embodiment of the present disclosure, an exhaust apparatus for an auxiliary power unit is disclosed. The exhaust apparatus may include an exhaust housing including a perforated body surrounding an exhaust airflow of the auxiliary power unit. The perforated body may include an outer surface, an inner surface, and a plurality of holes through which ambient air passes to mix with the exhaust airflow, the plurality of holes extending through the body from the outer surface to the inner surface.
Claims19
An exhaust apparatus for an auxiliary power unit comprising:
- an exhaust housing including a perforated body surrounding an exhaust airflow of the auxiliary power unit, the perforated body including:
- an outer surface,
- an inner surface, and
- a plurality of holes through which ambient air passes to mix with the exhaust airflow, the plurality of holes extending through the body from the outer surface to the inner surface.
An auxiliary power unit comprising:
- an engine casing;
- and
- an exhaust housing downstream of the engine casing, the exhaust housing including a perforated section for mixing ambient air with an exhaust airflow.
A method for reducing noise in an auxiliary power unit, comprising:
- directing an exhaust airflow out of a turbine section of the auxiliary power unit and into an exhaust housing;
- and
- mixing ambient air with the exhaust airflow through the use of a perforated section of the exhaust housing to decrease a velocity of the exhaust airflow.
Dependencies are inferred from the claim text.