An Airflow Generator

Abstract: An airflow generator (1) comprising: an electrically powered ducted fan (2) provided with an inlet (3) and an outlet (4), a fluid conduit (5); and an air multiplier (6) for discharging air along a first axis (A), said air multiplier (6) comprising an inlet (8) and an outlet (9), said fluid conduit (5) fluidly connecting the outlet (4) of the ducted fan (2) to the inlet (8) of the air multiplier (6). The air multiplier (6) comprises an aerodynamic profile defined by a cross-sectional profile shape (P) swept along a profile path (PA), wherein the cross-sectional profile shape (P) comprises outer wall portions defining an inner space (S) and defining said outlet (9) which fluidly connects the inner space (S) to ambient air. The outer wall portions comprise a rounded leading portion (P1) for facing incoming ambient air moved by the air multiplier (6), an elongated first side portion (P2) extending from the leading portion (P1) towards a trailing portion (PT) of the profile shape (P), and an elongated second side portion (P3) extending from the leading portion (P1) towards the trailing portion (PT) of the profile shape (P), wherein the first side portion (P2) extends non-overlapping with respect to itself, wherein the second side portion (P3) extends non-overlapping with respect to itself, and wherein the first side portion comprises a curved end portion (P4) extending along said first axis (A) past a free end (E) of the second side portion (P3).

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