GB715323A - Jet propulsion units - Google Patents

Jet propulsion units

Info

Publication number
GB715323A
GB715323A GB8839/51A GB883951A GB715323A GB 715323 A GB715323 A GB 715323A GB 8839/51 A GB8839/51 A GB 8839/51A GB 883951 A GB883951 A GB 883951A GB 715323 A GB715323 A GB 715323A
Authority
GB
United Kingdom
Prior art keywords
jet
pulse
ram
units
air
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
GB8839/51A
Inventor
Francois Gilbert Paris
Jean Le Foll
Jean Bertin
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 GB715323A publication Critical patent/GB715323A/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
    • F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
    • F02K7/10—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof characterised by having ram-action compression, i.e. aero-thermo-dynamic-ducts or ram-jet engines
    • F02K7/20—Composite ram-jet/pulse-jet engines

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

715,323. Jet propulsion plant. SOC. NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION. April 16, 1951 [Oct. 7, 1950], No. 8839/51. Class 110(3) A jet propulsion unit comprises a ram jet duct having in succession a frontal air intake of diverging form, an intermediate portion of greater cross section and a rearwardly directed propulsion nozzle and a pulse-jet unit substantially entirely enclosed by air flow in the ram jet duct having inlet adjacent or near to the intermediate portion of the ram jet chest and its combustion chamber at least partly inside the intermediate portion. A pulse-jet unit is defined as a pulsatory combustion chamber and a nozzle which ejects the gases intermittently. In the arrangement shown Figs. 1 and 2, four pulse jet units p<SP>1</SP>, p<SP>2</SP>, p<SP>3</SP> and p<SP>4</SP> are arranged in the casing, 1 forming a ram jet unit. Air entering the casing 1 at 2 is slowed down in a diffuser 5 and then divided. Part of the air enters the inlets 4 of the pulse jets and part flows over the pulse jets to the propulsion nozzle 3. The air passing through the inlets 4, which are provided with aerodynamic valves, enters pulsatory combustion chambers 6 which exhaust through tubes 7. The tubes 7 are surrounded by nozzle 8 which allow part of the air which has passed over the pulse jets to mix with the combustion gases from these jets. An aerodynamic valve is a valve which has a greater resistance flow in one direction than in another. These valves allow a certain amount of the combustion gases to flow back through the inlets 4 and to avoid the loss of these gases a bent tube 13 is provided to lead them in the same direction as the flow through the ram jet. The combustion chambers of the pulse jet units may be provided with fins 11 so as to assist in the transfer of heat to the air passing over the units. Some of these fins may be extended as at 12 to enable the pulse jet units to be supported relative to one another and to the casing 1. In a modification, the pulse-jet units are arranged in line and are surrounded by a ram jet of elongated form. This unit is stated to be suitable for installation in an aircraft wing with its inlet situated near the leading edge and its outlet near the trailing edge of the wing. It is also stated that supplementary fuel may be burnt in the ram jet unit. The outlets 10 of the pulse-jet units may be arranged, as shown after the outlet 3 of the ram jet or may terminate a little before the outlet 3. Additional fuel may be burnt in the airflow through the ram jet duct. Specifications 653,629 and 711,281 are referred to.
GB8839/51A 1950-10-07 1951-04-16 Jet propulsion units Expired GB715323A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR715323X 1950-10-07

Publications (1)

Publication Number Publication Date
GB715323A true GB715323A (en) 1954-09-15

Family

ID=9088855

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8839/51A Expired GB715323A (en) 1950-10-07 1951-04-16 Jet propulsion units

Country Status (1)

Country Link
GB (1) GB715323A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1429016A1 (en) * 2002-12-11 2004-06-16 General Electric Company Methods and apparatus for operating gas turbine engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1429016A1 (en) * 2002-12-11 2004-06-16 General Electric Company Methods and apparatus for operating gas turbine engines
US6813878B2 (en) 2002-12-11 2004-11-09 General Electric Company Methods and apparatus for operating gas turbine engines

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