Gas turbine engine with entrained particle separators

A turbine engine having an axial centerline, the turbine engine comprising:

• a compressor section;
• a combustor section having an annular combustor;
• an outer casing disposed radially outside of and spaced apart from the annular combustor, wherein a diffuser outer diameter (OD) flow path is disposed radially between the outer casing and the annular combustor;
• an inner diffuser case disposed radially inside of and spaced apart from the annular combustor, wherein a diffuser inner diameter (ID) flow path is disposed radially between the annular combustor and the inner diffuser case;
• a turbine section;
• a particle separator disposed within at least one of the diffuser OD flow path or the diffuser ID flow path, wherein the particle separator includes a housing having an interior cavity defined between an exterior wall and an interior wall, the housing extending between a forward end and an aft end, a plurality of helical dividers disposed within the interior cavity, at least one collection pocket, at least one inlet aperture, and a plurality of exit apertures;
• and
• a mechanism configured to produce an electrostatically charged surface on a portion of the particle separator;
• wherein the particle separator is configured so that an air flow enters the particle separator interior cavity through the at least one inlet aperture and enters a first passage defined by a respective helical divider and the electrostatically charged surface before exiting through the exit apertures;
• wherein the at least one collection pocket is in fluid communication with the first passage and is disposed to receive particulate matter entrained within the air flow.