Nozzle

A high-thrust, low-noise nozzle comprising a body having means defining a passageway, an entrance for admitting a pressurized primary fluid to said passageway, and an exit at one end of said body for discharging a stream of said primary fluid from said passageway, said body also having an exterior surface that is disposed so as to converge toward said passageway at said one end, and flow inducing means including at least one port communicating with said passageway between said exit and said entrance for conducting some of the pressurized primary fluid out of said passageway via said port and directing it along said surface toward said one end so as to induce a secondary fluid surrounding said body to flow along said surface and merge with the stream of primary fluid discharged from said exit.

A high-thrust low-noise nozzle adapted to effect movement of a secondary fluid by a pressurized primary fluid comprising, tubular means forming a passageway having an entrance and an exit orifice, said entrance being adapted for connection to a source of pressurized primary fluid, at least one port communicating with the passageway between said entrance and exit orifices, at least one other port communicating with said passageway between the first mentioned port and said exit orifice, means cooperating with said first mentioned and one other ports for directing flow of primary fluid from each of said ports in a direction so as to induce flow of a secondary fluid along the outside of said tubular means toward said exit, and noise-reducing means positioned in said passageway between said exit orifice and said one other port for effecting substantially laminar flow of the stream of pressurized primary fluid discharged from said exit orifice, said noise-reducing means creating sufficient back pressure to force some of the pressurized primary fluid to flow out of said passageway via said first mentioned and one other ports.

A high-thrust, low-noise nozzle comprising a body having means defining a passageway, an entrance for admitting a pressurized primary fluid to said passageway, and an exit at one end of said body for discharging a stream of said primary fluid from said passageway, said body also having first and second exterior surfaces that are disposed so as to converge toward said passageway at said one end, and flow inducing means including at least two ports, one of said ports communicating with said passageway between said exit and said entrance for conducting some of the pressurized primary fluid out of said passageway via said one port and directing it along said first surface toward said one end so as to induce a secondary fluid surrounding said body to flow along said first surface, and the other of said ports communicating with said passageway between said exit and said one port for conducting some of the pressurized primary fluid out of said passageway via said other port and directing it along said second surface toward said one end to induce more of said secondary fluid surrounding said body and the said fluids flowing along said first surface to merge with the stream of primary fluid discharged from said exit.