US 4,250,703 AGranted

Swinging door particle separator and deicing system

AssigneeAvco Corporation

InventorsRichard M. Norris, Joseph P. Murphy

Life of this patent

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Abstract

In a gas turbine engine, a duct is constructed extending axially and communicating directly, through a transverse opening, with the engine plenum. The plenum extends upward into the engine nacelle and connects with the inlet to the compressor of the gas turbine engine. A portion of the air entering the duct is drawn into the plenum. The remainder is exhausted out of the rear portion of the duct. To create inertial separation, a door is mounted on a lever arm which may be rotated between two positions. In one position the door partially closes the entrance to the plenum causing the airflow to turn through a greater angle in order to enter the plenum. The turning motion of the airflow divides the particles of heavier mass to the outside of the turn. These particles will be exhausted from the rearward exit of the duct. In a second position the door closes the rear portion of the duct so that the entire volume of air entering the duct is supplied to the engine plenum.

Claims4

Dependent claims

A particle separator and deicing system for the inlet of a gas turbine engine which is enclosed in a nacelle of an aircraft comprising:

a housing extending outward from the exterior of the nacelle and being constructed with an axially extending longitudinal duct;
said duct having a forward facing inlet and a rearward facing outlet to allow for the flow of air;
an opening is constructed in an interior wall of the housing adjacent to the nacelle, said opening communicating with the intake plenum of the gas turbine engine, and the duct, to form an entrance for the flow of air into the plenum;
a door mounted in the entrance to the plenum for movement between a first position and second position, where in the first position the door extends partially across the entrance to the plenum to force the airflow entering the plenum to bend through a substantial angle thereby causing particles of significant mass in the airflow to be separated by inertia and exhausted through the outlet of the duct;
and in the second position the door blocks the rearward facing exit to force substantially all of the air entering the duct to flow into the engine plenum;
and
actuating means operatively associated with the door to move said door between the first and second positions.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/021,422Filed 15 Mar 1979
Granted: 17 Feb 1981
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F02C 7/052
Having provisions for obviating the penetration of damaging objects or particles: with dust-separation devices
B64D 33/02
Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for: of combustion air intakes
F02C 7/05
Air intakes for gas-turbine plants or jet-propulsion plants: having provisions for obviating the penetration of damaging objects or particles
B64D 2033/0233
Of combustion air intakes: comprising de-icing means