Systems and methods for turbine engine particle separation

A turbine engine incorporating a fine particle separation means, the turbine engine comprising:

• a radial compressor that rotates about an axis, and which compresses air fed thereto;
• a diffuser located downstream and radially outward, with respect to a longitudinal axis of the turbine engine, from the radial compressor, and which decreases a velocity of and increases a static pressure of the compressed air exiting the radial compressor;
• a flow path positioned downstream, with respect to the longitudinal axis, from the diffuser, wherein the flow path comprises an outer annular wall and an inner annular wall between which the compressed air flows, and wherein the flow path comprises an arc that redirects the compressed air from flowing in a substantially radial flow direction to a substantially axial flow direction;
• an extraction slot in the outer annular wall that fluidly connects with a scavenge plenum, the scavenge plenum being positioned adjacent to and radially outward, with respect to the longitudinal axis, from the outer annular wall at a position downstream axially along the flow path from the arc, the extraction slot also being positioned downstream axially along the flow path from the arc, wherein the extraction slot comprises a radial spacing between the outer annular wall of the flow path and an inner radial wall of the scavenge plenum, the extraction slot configured to direct a portion of the compressed air containing fine particles from the flow path into the scavenge plenum, the scavenge plenum configured to separate the fine particles from the portion of the compressed air;
• and
• an aspiration slot, downstream from the extraction slot with respect to a flow along the flow path, the scavenge plenum configured to recirculate the portion of compressed air in the scavenge plenum back into the flow path using the aspiration slot, wherein the aspiration slot comprises an opening from the scavenge plenum to a deswirl assembly positioned downstream from the extraction slot with respect to the flow along the flow path that passes through the inner radial wall of the scavenge plenum, such that the aspiration slot directs the portion of compressed air back into the flow path at the deswirl assembly.