Gas turbine engine air intake

Claim 1

A gas turbine engine air intake comprising: a duct having a circular cross-section shape; a centre body having a hollow interior and having a circular cross-section shape, said centre body having a first portion coaxially positioned upstream of said duct, said first portion having a part thereof of greater diameter than said duct, said centre body further having a second portion aligned with said first portion and extending coaxially within said duct and defining therewith an annular air inlet, said first portion and said second portion having spaced confronting edges; a first drain means positioned on said first portion of said centre body and providing communication between the exterior and hollow interior of said centre body, said first drain means being defined by said confronting edges of said aligned portions of said centre body so that said first drain means provide the only interruption of the otherwise continuous exterior of said centre body, and being positioned to direct at least some of any liquid droplets impacting and subsequently flowing across the exterior of said first portion of said centre body into the hollow interior of said centre body; means to reduce the air pressure within the hollow interior of said centre body whereby the flow of liquid droplets through said drain means is enhanced, said means to reduce the air pressure within said centre body comprising a plurality of apertures in said centre body interconnecting said annular air inlet with the interior of said centre body; and a second drain means operatively associated with said centre body for draining liquid from the hollow interior of said centre body to a location remote from said engine air inlet.