US2944386A - Device for increasing the impulsion of a fluid, especially applicable as a lift or propulsion device - Google Patents

Device for increasing the impulsion of a fluid, especially applicable as a lift or propulsion device Download PDF

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Publication number
US2944386A
US2944386A US667831A US66783157A US2944386A US 2944386 A US2944386 A US 2944386A US 667831 A US667831 A US 667831A US 66783157 A US66783157 A US 66783157A US 2944386 A US2944386 A US 2944386A
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Prior art keywords
fluid
divergent
convergent
lift
impulsion
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Expired - Lifetime
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US667831A
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Bertin Jean Henri
Schmitt Henri Francois
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Bertin Technologies SAS
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Bertin et Cie SA
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C23/00—Influencing air flow over aircraft surfaces, not otherwise provided for
    • B64C23/005—Influencing air flow over aircraft surfaces, not otherwise provided for by other means not covered by groups B64C23/02 - B64C23/08, e.g. by electric charges, magnetic panels, piezoelectric elements, static charges or ultrasounds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
    • F02K1/28—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto using fluid jets to influence the jet flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
    • F02K1/36—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto having an ejector

Definitions

  • Thisapparatus is characterised by the combination of a convergent tubular member which brings the fluid up to speed and a divergent portion serving to reduce the convergent 1 is induced by the action of the fluid screen discharged from the slot 3.
  • the divergent tube 5 is intended to channel the flow induced through the convergent 1 and the screenissuing from the slot 3, when this screen, after a certain active trajectory through the air, indicated by the arrows F and F, has lost the greater part of its energy and therefore of its eifectiveness.
  • the tube 5 then acts to relay this fluid screen in its action and improves the pressure coupling between the induced i jet and the atmosphere. In addition, this regularisation of.
  • the tube 5 must be coupled to the fluid screen and in view of the large divergence of this screen (half-angle at the apex of,30, for example), its diameter at'the neck must be clearly greater than that of the, neck 2 of the convergent '1 (by, 'to 50%, for' 1 example).
  • the said portion being formed by a fluid screen produced by the discharge of a fluid under pressure through a nozzle in the form of a suitably orientatedslotarranged on the solid convergent tubular member.
  • the present invention has for its object improvements made to this device, in particular with a'view to rendering its use more convenient, more practical and more efiective. r
  • a solid divergent is provided at a certain distance from the convergent so as.
  • this divergent having an intake section suitably adapted to thatoflthe fluid 7 screen and greater than the neck of the convergent from which it is separated by a space in which the fluidrscreen acts alone.
  • Fig. 1 shows in axial cross-section an impulsionincreasing device combined with a solid divergent.
  • Fig. 2 relates to an improvement in the lift device applicable to the casein which the divergent fluid screen is formed'by a liquid.
  • Fig. 1 there is seen at 1 the convergent of the lift device terminating at the neck 2 or very slightly on the certain distance by a tubular divergent member '5, which 5 is usually fairly short, and which is coupled to the convergent 1 by arms 6 and 6'.
  • This tube 5 may comprise a small convergent 7.
  • Fig. 2 shows a lift device of this type, in which the fluid divergent is formed by a liquid passed into the collector 4.
  • a pump'41' driven by a motor 42 brings back this liquid, under pressure, into the collector 4.
  • Jet augmenter comprising a convergent duct bounded by a physical wall and ending with an orifice open tothe atmosphere, a pressure chamber integral with said wall and extending outside said duct in the vicinity of said orifice, means for supplying pressure liquid to said chamber, a slot-like nozzle communicating with said chamber'and adapted to dischargesaid liquid in the form said orifice and facing in a direction diverging slightly 1 from the axis of said duct whereby the jet issuingv from, said nozzle forms a divergent liquid wall extending the convergent physical wall of the duct and bathed by the atmosphere, a divergent duct bounded by a physical wall and substantially coaxial with the convergent duct, said divergent duct extending at a distance downstream of the convergent duct and around the path of the divergent .jet, an annular chamber formed on said divergent duct and having an annular: inlet. facing towards said slot-like,

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)

Description

July 12, 1960 J.- H. BERTIN ETAL 2,944,386
DEVICE FOR INCREASING THE IMPULSION OF A FLUID, ESPECIALLY APPLICABLE AS A LIFT OR PROPULSION DEVICE Filed June 25, 1957 INVENTORS a -Mu M JM 1B1 Mafia-x), 8:4,, M v d/afiar ATTORNEYS DEVICE FOR INCREASING THE IMPULSION A V FLUID, ESPECIALLY APPLICABLE AS A LIFI OR PROPULSION DEVICE Jean Henri Bel-tin, Neuilly sur-Seine, and Henri Francois Schmitt, Bourg la-Reine, France, assignors to Societe Bertin & Cie, Paris, France, a French company i Filed June 25, 1957, Ser. No. 667,831 7 Claims priority, application France June 25, 1956 1 Claim. (Cl. 60-355) In their patent application No. 624,811 of Nov. 28, 1956, now Patent No. 2,922,277, the applicants have described a device for increasing the impulsion of a flow of fluid which is especially applicable as a lift or propulsion device for aircraft.
Thisapparatus is characterised by the combination of a convergent tubular member which brings the fluid up to speed and a divergent portion serving to reduce the convergent 1 is induced by the action of the fluid screen discharged from the slot 3. The divergent tube 5 is intended to channel the flow induced through the convergent 1 and the screenissuing from the slot 3, when this screen, after a certain active trajectory through the air, indicated by the arrows F and F, has lost the greater part of its energy and therefore of its eifectiveness. I The tube 5 then acts to relay this fluid screen in its action and improves the pressure coupling between the induced i jet and the atmosphere. In addition, this regularisation of. the induced flow is accompanied by an increase in the quantity of this flow'which acts concurrently-m increase the thrust produced. The tube 5 must be coupled to the fluid screen and in view of the large divergence of this screen (half-angle at the apex of,30, for example), its diameter at'the neck must be clearly greater than that of the, neck 2 of the convergent '1 (by, 'to 50%, for' 1 example).
speed, the said portion being formed by a fluid screen produced by the discharge of a fluid under pressure through a nozzle in the form of a suitably orientatedslotarranged on the solid convergent tubular member.
The present invention has for its object improvements made to this device, in particular with a'view to rendering its use more convenient, more practical and more efiective. r
In accordance withthe invention, a solid divergent is provided at a certain distance from the convergent so as. i
v of a' jet, said nozzle extending along the periphery of to envelop and sustain the divergent fluid screen which,
at that distance, has lost a great part of its energy and in consequence of its eflectiveness, this divergent having an intake section suitably adapted to thatoflthe fluid 7 screen and greater than the neck of the convergent from which it is separated by a space in which the fluidrscreen acts alone. a
In the accompanying drawings:
Fig. 1 shows in axial cross-section an impulsionincreasing device combined with a solid divergent.
Fig. 2 relates to an improvement in the lift device applicable to the casein which the divergent fluid screen is formed'by a liquid.
In Fig. 1, there is seen at 1 the convergent of the lift device terminating at the neck 2 or very slightly on the certain distance by a tubular divergent member '5, which 5 is usually fairly short, and which is coupled to the convergent 1 by arms 6 and 6'. I This tube 5 may comprise a small convergent 7.
from as a divergent jet, and a pump which sucks the liquid collected in said vannular chamber and discharges downstream side of this neck, at 3 the nozzle in the It will be assumed in this example that the flow in the. i
Fig. 2"shows a lift device of this type, in which the fluid divergent is formed by a liquid passed into the collector 4. A ring 39.disposed coaxially with the convergent 1 and provided with an annular slot 40 recovers the liquid used for the fluid screen. v A pump'41' driven by a motor 42 brings back this liquid, under pressure, into the collector 4.
What is claimed is:
Jet augmenter comprising a convergent duct bounded by a physical wall and ending with an orifice open tothe atmosphere, a pressure chamber integral with said wall and extending outside said duct in the vicinity of said orifice, means for supplying pressure liquid to said chamber, a slot-like nozzle communicating with said chamber'and adapted to dischargesaid liquid in the form said orifice and facing in a direction diverging slightly 1 from the axis of said duct whereby the jet issuingv from, said nozzle forms a divergent liquid wall extending the convergent physical wall of the duct and bathed by the atmosphere, a divergent duct bounded by a physical wall and substantially coaxial with the convergent duct, said divergent duct extending at a distance downstream of the convergent duct and around the path of the divergent .jet, an annular chamber formed on said divergent duct and having an annular: inlet. facing towards said slot-like,
nozzle in order to collect part ofthe liquid issuing thereit into said pressure chamber.
References Cited in the file of this patent Germany July 4, 1910
US667831A 1956-06-25 1957-06-25 Device for increasing the impulsion of a fluid, especially applicable as a lift or propulsion device Expired - Lifetime US2944386A (en)

Applications Claiming Priority (1)

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FR864028X 1956-06-25

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DE (1) DE1049712B (en)
GB (1) GB864028A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230702A (en) * 1959-10-16 1966-01-25 Bertin & Cie Jet diffuser usable as a propeller shroud
US4272499A (en) * 1979-11-28 1981-06-09 Lone Star Steel Company Process and apparatus for the removal of particulate matter and reactive or water soluble gases from carrier gases
WO1983003777A1 (en) * 1982-04-26 1983-11-10 Western Electric Company, Inc. Vapor-phase axial deposition system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE223896C (en) *
US284962A (en) * 1883-09-11 William huston
US1415406A (en) * 1917-06-01 1922-05-09 British Westinghouse Electric Elastic-fluid-operated ejector
US2000762A (en) * 1933-10-26 1935-05-07 Gen Electric Fluid jet pump
US2379436A (en) * 1942-05-20 1945-07-03 Distillation Products Inc Method and apparatus for producing vacuums

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE223896C (en) *
US284962A (en) * 1883-09-11 William huston
US1415406A (en) * 1917-06-01 1922-05-09 British Westinghouse Electric Elastic-fluid-operated ejector
US2000762A (en) * 1933-10-26 1935-05-07 Gen Electric Fluid jet pump
US2379436A (en) * 1942-05-20 1945-07-03 Distillation Products Inc Method and apparatus for producing vacuums

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230702A (en) * 1959-10-16 1966-01-25 Bertin & Cie Jet diffuser usable as a propeller shroud
US4272499A (en) * 1979-11-28 1981-06-09 Lone Star Steel Company Process and apparatus for the removal of particulate matter and reactive or water soluble gases from carrier gases
WO1983003777A1 (en) * 1982-04-26 1983-11-10 Western Electric Company, Inc. Vapor-phase axial deposition system

Also Published As

Publication number Publication date
GB864028A (en) 1961-03-29
DE1049712B (en) 1959-01-29

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