Particle separator with scroll scavenging means

Claim 1

In a gas turbine engine assembly wherein an improved engine inlet particle separator includes a pair of spaced apart wall members defining an annular inlet and an annular outlet for communication with the engine inlet, wall means defining a collection chamber in flow communication with the annular passageway for receiving and removing extraneous matter from the stream of air supplied to the engine inlet through the passageway and means for centrifuging the extraneous matter out of the air stream within the passageway into the collection chamber, the improvement comprising: scroll scavenging means having a plurality of turning vanes with the leading edge of each vane spaced upstream of the trailing edge of an adjacent vane to divide the collection chamber and define an annular extraction manifold at the downstream portion thereof thereby reducing the likelihood that particles of extraneous matter entrained within the extraction manifold are rebounded back into the passageway, whereby all particles entering the collection chamber may be inhibited from rebound back into the passageway after only limited circumferential travel around the collection chamber, and means for continuously ducting extraneous matter from the extraction manifold including a blower for establishing a vacuum within the extraction manifold and drawing out the extraneous matter entrained within the manifold.