GB788316A - Jet propulsion system and discharge nozzles therefor - Google Patents

Jet propulsion system and discharge nozzles therefor

Info

Publication number
GB788316A
GB788316A GB34254/54A GB3425454A GB788316A GB 788316 A GB788316 A GB 788316A GB 34254/54 A GB34254/54 A GB 34254/54A GB 3425454 A GB3425454 A GB 3425454A GB 788316 A GB788316 A GB 788316A
Authority
GB
United Kingdom
Prior art keywords
holes
nozzle
fluid stream
hydraulic jack
convergent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB34254/54A
Inventor
Peter Frederick Ashwood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Power Jets Research and Development Ltd
Original Assignee
Power Jets Research and Development Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Power Jets Research and Development Ltd filed Critical Power Jets Research and Development Ltd
Publication of GB788316A publication Critical patent/GB788316A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F02K1/30—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 for varying effective area of jet pipe or nozzle

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)

Abstract

788,316. Jet propulsion plant. POWER JETS (RESEARCH & DEVELOPMENT), Ltd. Nov. 17, 1955 [Nov. 25, 1954], No. 34254/54. Class 110 (3). In a jet propulsion system, the discharge nozzle has a retaining wall for the propulsive fluid stream including a throat portion and an outlet portion diverging downstreamwardly of the throat portion, at least one circumferentially extending fenestration in these portions at a region upstream of the nozzle outlet end for placing the fluid stream in communication with fluid outside the nozzle, means for interrupting the communication and means operable to constrict the transverse area of the fluid stream at the fenestration. The nozzle wall has a convergent entry portion 7, Fig. 2, a throat portion 8, and a divergent outlet portion 9. Four circumferentially-extending rectangular holes 10 are provided in the portion 8, and are closable by a ring 11 having four corresponding holes 13 and rotatable about the nozzle axis by means of an hydraulic jack 15. The ring 11 may instead be arranged to move axially. When the holes 10 are open, atmospheric air enters through the holes and changes the fluid flow from convergent-divergent to convergent form. A valve 21 may be opened when the holes 10 are open or closed, to admit air from the compressor of the gas turbine engine through a circumferential slit 18 in the form of a jet which impinges on the fluid stream and reduces its cross-sectional area. In an alternative construction, Fig. 5, each hole 10 has a tube 23 extending radially to an outer casing 5 and closable by a butterfly valve 25. The valves 25 are operated in unison by an hydraulic jack 15 which rotates a ring 28 connected to the valves through links 30 and cranks 27. The cross-sectional area of the fluid flow can be reduced by calipers 35, Fig. 6, pivotally mounted at 34 within a peripheral recess 32 located upstream of the holes 10. The calipers 35 are actuated by a double-ended hydraulic jack 39. A variable iris mechanism may be used instead.
GB34254/54A 1954-11-25 1954-11-25 Jet propulsion system and discharge nozzles therefor Expired GB788316A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1140440X 1954-11-25

Publications (1)

Publication Number Publication Date
GB788316A true GB788316A (en) 1957-12-23

Family

ID=10877151

Family Applications (2)

Application Number Title Priority Date Filing Date
GB30035/48A Expired GB654344A (en) 1954-11-25 1948-11-18 Method of regulating gas turbine jet-propulsion plants, and means therefor
GB34254/54A Expired GB788316A (en) 1954-11-25 1954-11-25 Jet propulsion system and discharge nozzles therefor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB30035/48A Expired GB654344A (en) 1954-11-25 1948-11-18 Method of regulating gas turbine jet-propulsion plants, and means therefor

Country Status (3)

Country Link
CH (1) CH269899A (en)
FR (2) FR1006139A (en)
GB (2) GB654344A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957310A (en) * 1959-05-11 1960-10-25 Orenda Engines Ltd Convergent-divergent nozzle assembly
US3041825A (en) * 1958-11-18 1962-07-03 Gen Electric Flow stabilizing means for converging-diverging nozzle
US3048973A (en) * 1959-10-29 1962-08-14 Marcus C Benedict Exhaust nozzle
DE1139702B (en) * 1958-10-08 1962-11-15 Snecma Device for adapting a convergent-divergent nozzle to variable relaxation conditions

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073242B (en) * 1960-01-14 Power Jets (Research &. Develop ment) Limited London Jet propulsion nozzle
DE1085720B (en) * 1954-04-27 1960-07-21 Napier & Son Ltd Jet engine
US2957306A (en) * 1955-06-16 1960-10-25 John S Attinello Gas jets for controlling entrance and/or exit flow effective diameter
US3109284A (en) * 1956-06-14 1963-11-05 Power Jets Res & Dev Ltd Discharge nozzles for propulsive jets
US2994193A (en) * 1956-06-14 1961-08-01 Gen Motors Corp Jet thrust reversing means for jet engines
GB820059A (en) * 1956-07-30 1959-09-16 Bristol Aero Engines Ltd Improvements in or relating to jet propulsion nozzles
US2986002A (en) * 1957-06-05 1961-05-30 Curtiss Wright Corp Leaky-type exhaust nozzle for jet propulsion devices
US3098387A (en) * 1957-08-19 1963-07-23 Thompson Ramo Wooldridge Inc Turbine
FR1182810A (en) * 1957-09-16 1959-06-30 Snecma Improvements to adjustable section ejection nozzles
US2971327A (en) * 1957-11-26 1961-02-14 Westinghouse Electric Corp Discharge control of an overexpanding propulsion nozzle
US3049873A (en) * 1958-02-04 1962-08-21 Westinghouse Electric Corp Exhaust nozzle having a flow area of variable convergency and divergency
US3010280A (en) * 1958-03-25 1961-11-28 United Aircraft Corp Variable-expansion nozzle
US3032977A (en) * 1958-06-05 1962-05-08 Gen Electric Correlated bypass inlet and outlet control for a supersonic reaction powerplant
US3044258A (en) * 1958-11-25 1962-07-17 Gen Electric Adjustable converging-diverging nozzle
US2959917A (en) * 1959-04-06 1960-11-15 Boeing Co Sound suppressor for jet engines
US3095696A (en) * 1959-09-25 1963-07-02 Roy W Rumble Combustion-engine exhaust systems
NL262125A (en) * 1960-04-01
DE1230620B (en) * 1963-01-09 1966-12-15 Rolls Royce Vertical lift engine system for aircraft
US4018384A (en) * 1976-02-13 1977-04-19 Chandler Evans Inc. Flow attachment device for thrust vector control
US5683033A (en) * 1989-02-08 1997-11-04 United Technologies Corporation Rocket nozzle for a rocket engine
US5619851A (en) * 1989-02-08 1997-04-15 United Technologies Corporation Rocket nozzle for a rocket engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139702B (en) * 1958-10-08 1962-11-15 Snecma Device for adapting a convergent-divergent nozzle to variable relaxation conditions
US3041825A (en) * 1958-11-18 1962-07-03 Gen Electric Flow stabilizing means for converging-diverging nozzle
US2957310A (en) * 1959-05-11 1960-10-25 Orenda Engines Ltd Convergent-divergent nozzle assembly
US3048973A (en) * 1959-10-29 1962-08-14 Marcus C Benedict Exhaust nozzle

Also Published As

Publication number Publication date
FR1140440A (en) 1957-07-22
FR1006139A (en) 1952-04-21
GB654344A (en) 1951-06-13
CH269899A (en) 1950-07-31

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