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US 8,029,244 B2Granted
Fluid flow amplifier
OwnerElijah Dumas, Elisha Dumas +1inventors
InventorsElijah Dumas, Elisha Dumas, Howard Dumas
Life of this patent
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Abstract
A by-pass fluid flow amplifier which contains a primary nozzle and a primary profile for discharging compressed air into a conduit of the air amplifier and entraining ambient air in the process. A secondary nozzle and a secondary profile for discharging compressed air into the conduit of the air amplifier towards the rear that assists the primary nozzle such as to allow consistent fluid wall attachment of the compressed air and the entrained air caused by the primary nozzle and the primary profile. The secondary nozzle increases the total flow of the amplifier and prohibits the total flow from traveling towards the center of the conduit where flow reversal and turbulence are likely to occur.
Claims9
A fluid flow amplifier comprising:
- a fluid flow amplifier body having an inlet opening at one end, said one end being tapered with increase of said inlet opening in the outward direction;
- a plug inserted into and connected to the fluid flow amplifier body from the side opposite to the aforementioned inlet opening, said plug having a central through opening for a secondary fluid flow of the fluid flow amplifier, the central through opening having an inlet end located in proximity to the aforementioned inlet opening of the fluid flow amplifier body and an outlet end, said fluid flow amplifier body having an inner surface, and said plug having an outer surface, the inlet end of the central through opening forming with said inlet opening of the fluid flow amplifier body a primary nozzle, said primary nozzle having a profile that creates a near-wall flow effect for a flow of a secondary fluid that enters said inlet opening of the fluid flow amplifier body;
- at least one closed inner cavity formed between the aforementioned inner surface of the fluid flow amplifier body and the outer surface of the plug, said closed inner cavity being connected to the aforementioned central through opening via said primary nozzle;
- a channel for the supply of a primary fluid under pressure to the aforementioned inner cavity;
- and
- flow turbulence and reversing prevention means that connect the closed inner cavity with said central through opening near the aforementioned outlet end thereof, wherein the flow turbulence and reversing prevention means is at least one secondary nozzle that has a fluid passing diameter and is located near the outlet of the central through opening and creates a secondary flow of the primary fluid in the direction of the secondary flow for accelerating the aforementioned secondary flow, and wherein the flow turbulence and reversing prevention means have means for adjusting the aforementioned fluid passing diameter of the secondary nozzle.
3 more elements
A fluid flow amplifier comprising:
- a fluid flow amplifier body having an inlet opening at one end, said one end being tapered with increase of said inlet opening in the outward direction;
- a plug inserted into and connected to the fluid flow amplifier body from the side opposite to the aforementioned inlet opening, said plug having a central through opening for a secondary fluid flow of the fluid flow amplifier, the central through opening having an inlet end located in proximity to the aforementioned inlet opening of the fluid flow amplifier body and an outlet end, said fluid flow amplifier body having an inner surface, and said plug having an outer surface, the inlet end of the central through opening forming with said inlet opening of the fluid flow amplifier body a primary nozzle, said primary nozzle having a profile that creates a near-wall flow effect for a flow of a secondary fluid that enters said inlet opening of the fluid flow amplifier body;
- at least one closed inner cavity formed between the aforementioned inner surface of the fluid flow amplifier body and the outer surface of the plug, said closed inner cavity being connected to the aforementioned central through opening via said primary nozzle;
- a channel for the supply of a primary fluid under pressure to the aforementioned inner cavity;
- and flow turbulence and reversing prevention means that connect the closed inner cavity with said central through opening near the aforementioned outlet end thereof, wherein said one end which is tapered with increase of said inlet opening in the outward direction is tapered at an angle of 30 to 60°, the fluid is air, and the aforementioned profile that creates a near-wall flow effect for a flow of a secondary fluid is a Coanda profile, and wherein the flow turbulence and reversing prevention means have means for adjusting the aforementioned fluid passing diameter of the secondary nozzle.
2 more elements
Dependencies are inferred from the claim text.