GB782852A - A device for varying the effective nozzle area of a rocket or other jet propulsion unit - Google Patents

A device for varying the effective nozzle area of a rocket or other jet propulsion unit

Info

Publication number
GB782852A
GB782852A GB3230/55A GB323055A GB782852A GB 782852 A GB782852 A GB 782852A GB 3230/55 A GB3230/55 A GB 3230/55A GB 323055 A GB323055 A GB 323055A GB 782852 A GB782852 A GB 782852A
Authority
GB
United Kingdom
Prior art keywords
nozzle
rocket
annular
propulsion
jet
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
GB3230/55A
Inventor
Marcel Kadosch
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.)
Safran Aircraft Engines SAS
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
SNECMA SAS
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA, SNECMA SAS filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of GB782852A publication Critical patent/GB782852A/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
    • F02K1/06—Varying effective area of jet pipe or nozzle
    • F02K1/08—Varying effective area of jet pipe or nozzle by axially moving or transversely deforming an internal member, e.g. the exhaust cone
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/80—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by thrust or thrust vector control
    • F02K9/82—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by thrust or thrust vector control by injection of a secondary fluid into the rocket exhaust gases

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Abstract

782,852. Jet propulsion nozzles. SOC. NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION. Feb. 3, 1955 [Feb. 11, 1954], No. 3230/55. Addition to 745,630. Class 110 (3). A rocket or jet propulsion unit having a jet propulsion nozzle as claimed in the parent Specification in which the area of the propulsion nozzle is varied by means of an annular auxiliary jet inclined upstream with respect to the flow through the nozzle, has the passage extending around the end of the nozzle supplied with motive gas tapped from the main stream in the nozzle in a part thereof upstream of the end of the nozzle or in a part of the unit in direct communication with the nozzle. In the arrangement shown, gas from the main jet flow enters an annular conduit formed between the surface ABC of an annular body mounted in the propulsion nozzle and the propulsion nozzle casing. This gas is expanded in the nozzle CF. The annular body is attached by arms 1 to pistons 3, 31 mounted in a cylinder 6. Springs 8, 81 maintain the pistons 3, 3<SP>1</SP> in the mean position. When it is desired to vary the effective area of the propelling nozzle, compressed air is supplied through one of the conduits 7a, 7<SP>1</SP>a and the annular body is thereby moved to increase or decrease the width of the nozzle CF. In a modification applied to a rocket, an annular conduit, arranged around the end of the nozzle, communicates with the main flow through an annular slot. This conduit is supplied with fluid from the combustion chamber of the rocket through a by-pass pipe provided with a butterfly control valve. This valve may be automatically controlled by speed or altitude or by a clockwork movement.
GB3230/55A 1954-02-11 1955-02-03 A device for varying the effective nozzle area of a rocket or other jet propulsion unit Expired GB782852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR65303T 1954-02-11

Publications (1)

Publication Number Publication Date
GB782852A true GB782852A (en) 1957-09-11

Family

ID=8698225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3230/55A Expired GB782852A (en) 1954-02-11 1955-02-03 A device for varying the effective nozzle area of a rocket or other jet propulsion unit

Country Status (2)

Country Link
FR (1) FR65303E (en)
GB (1) GB782852A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1155971A (en) * 1956-07-11 1958-05-12 Snecma Improvement to multi-stream jet thrusters
GB820059A (en) * 1956-07-30 1959-09-16 Bristol Aero Engines Ltd Improvements in or relating to jet propulsion nozzles
FR1182810A (en) * 1957-09-16 1959-06-30 Snecma Improvements to adjustable section ejection nozzles

Also Published As

Publication number Publication date
FR65303E (en) 1956-02-08

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