Compressor with particle separation

An air compressor having a flow path, cambered stationary guide vanes in said flow path, said cambered guide vanes having concave surfaces on at least a part of one side of said guide vanes, said guide vanes creating a curving centrifugal flow field between them due to the camber of said vanes, said concave surfaces incorporating a porous material on at least a part of said surfaces, said porous material having sufficient porosity to trap airborne particles,

• whereby said curving centrifugal flow field causes said airborne particles to impinge on said concave surfaces and be trapped by said porous material.

An air compressor having a rotor for adding energy to air flowing through said compressor, a shroud surrounding said rotor, said shroud having a radially innermost surface, and a porous material on at least a part of said surface, said addition of energy by said rotor imparting circumferential velocity and a corresponding centrifugal flow field to said air flowing through said compressor, said centrifugal flow field causing airborne particles to be thrown radially outward and against said radially innermost surface on said shroud,

• whereby said airborne particles impacting said radially innermost surface due to said centrifugal flow field are trapped by said porous material.