A particle separator (12, 212) for use with a gas turbine engine (10, 210), the particle separator comprising: an adaptive-area hub (22, 222) arranged circumferentially about an axis of the particle separator to define an inner profile of the particle separator, the adaptive-area hub includes an inner wall (44, 244) arranged circumferentially about the axis, a plurality of outer slats (48, 248) arranged circumferentially about the inner wall, and a plurality of inner slats (46, 246) located radially between the inner wall and the plurality of outer slats; an outer wall (24, 224) arranged circumferentially about the adaptive-area hub (22, 222) to define an inlet passageway between the outer wall and the adaptive-area hub, the inlet passageway adapted to receive a mixture of air and particles suspended in the air; and a splitter (26, 226) located aft of the adaptive-area hub (22, 222) and configured to separate the mixture of air and particles into a clean flow substantially free of particles and a dirty flow containing the particles during operation of the particle separator (12, 212); wherein the adaptive-area hub (22, 222) is configured to move between a non-austere position in which the plurality of inner slats (46, 246) is aligned circumferentially with the plurality of outer slats (48, 248) to cause the inner wall (44, 244) to provide the inner profile of the particle separator such that the inlet passageway has a first area and an austere position in which the plurality of inner slats is misaligned circumferentially with the plurality of outer slats to cause the plurality of inner slats and the plurality of outer slats to cooperate to provide the inner profile of the particle separator such that the inlet passageway has a second area smaller than the first area to encourage the particles into the dirty flow. an adaptive-area hub (22, 222) arranged circumferentially about an axis of the particle separator to define an inner profile of the particle separator, the adaptive-area hub includes an inner wall (44, 244) arranged circumferentially about the axis, a plurality of outer slats (48, 248) arranged circumferentially about the inner wall, and a plurality of inner slats (46, 246) located radially between the inner wall and the plurality of outer slats; an outer wall (24, 224) arranged circumferentially about the adaptive-area hub (22, 222) to define an inlet passageway between the outer wall and the adaptive-area hub, the inlet passageway adapted to receive a mixture of air and particles suspended in the air; and a splitter (26, 226) located aft of the adaptive-area hub (22, 222) and configured to separate the mixture of air and particles into a clean flow substantially free of particles and a dirty flow containing the particles during operation of the particle separator (12, 212); wherein the adaptive-area hub (22, 222) is configured to move between a non-austere position in which the plurality of inner slats (46, 246) is aligned circumferentially with the plurality of outer slats (48, 248) to cause the inner wall (44, 244) to provide the inner profile of the particle separator such that the inlet passageway has a first area and an austere position in which the plurality of inner slats is misaligned circumferentially with the plurality of outer slats to cause the plurality of inner slats and the plurality of outer slats to cooperate to provide the inner profile of the particle separator such that the inlet passageway has a second area smaller than the first area to encourage the particles into the dirty flow.