GB654904A - Improvements in or relating to the silencing of the exhaust of gas turbine engine installations - Google Patents

Improvements in or relating to the silencing of the exhaust of gas turbine engine installations

Info

Publication number
GB654904A
GB654904A GB2681048A GB2681048A GB654904A GB 654904 A GB654904 A GB 654904A GB 2681048 A GB2681048 A GB 2681048A GB 2681048 A GB2681048 A GB 2681048A GB 654904 A GB654904 A GB 654904A
Authority
GB
United Kingdom
Prior art keywords
jet
baffles
sound
exhaust
parallel
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
GB2681048A
Inventor
Frederick Reginald Murray
George Roland Gahagan
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB2681048A priority Critical patent/GB654904A/en
Publication of GB654904A publication Critical patent/GB654904A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
    • B64F1/00—Ground or aircraft-carrier-deck installations
    • B64F1/26—Ground or aircraft-carrier-deck installations for reducing engine or jet noise; Protecting airports from jet erosion

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Exhaust Silencers (AREA)

Abstract

654,904. Silencing gaseous currents. ROLLS-ROYCE, Ltd. Oct. 14, 1948, No. 26810. [Class 7(ii)] A silencer for a gas 'turbine installation when running on the ground, either under test or operating a wind tunnel, comprises overlapping baffles 14 made of sound-absorbing materials and arranged to reflect the sound waves 13 emanating from the exhaust nozzle 10 and to induce a layer of cold air around the jet 11. The edges of the baffles adjacent the exhaust jet lie approximately in a'line corresponding with the edge of the jet cone. The baffles may be transverse to the sound waves as shown, or parallel to the jet axis 12. In addition to the two sets of baffles, seen in plan view, a further set may be provided above the jet. Alternatively they may be formed arch-shaped or annular. The baffles may be curved and have their left-hand ends only parallel to the jet axis 12. They are preferably made of perforated sheet-metal casings filled with sound-absorbing material and have a thickness which is one quarter of the lowest wave-length they have to absorb. The device may be mounted on a wheeled trolley. The nozzle' 10 may be elliptical or rectangular with the major axis parallel to the ground which is preferably covered with a thick layer of sound absorbing material.
GB2681048A 1948-10-14 1948-10-14 Improvements in or relating to the silencing of the exhaust of gas turbine engine installations Expired GB654904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2681048A GB654904A (en) 1948-10-14 1948-10-14 Improvements in or relating to the silencing of the exhaust of gas turbine engine installations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2681048A GB654904A (en) 1948-10-14 1948-10-14 Improvements in or relating to the silencing of the exhaust of gas turbine engine installations

Publications (1)

Publication Number Publication Date
GB654904A true GB654904A (en) 1951-07-04

Family

ID=10249592

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2681048A Expired GB654904A (en) 1948-10-14 1948-10-14 Improvements in or relating to the silencing of the exhaust of gas turbine engine installations

Country Status (1)

Country Link
GB (1) GB654904A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015270B (en) * 1952-07-25 1957-09-05 Alec David Young Sound absorber device for jet jet devices, especially aircraft jet engines
US2955418A (en) * 1958-08-06 1960-10-11 Ryan Aeronautical Co Combination augmenter, sound suppressor and thrust reverser for jet engines
DE1247750B (en) * 1964-04-20 1967-08-17 Oskar Bschorr Dipl Ing Silencer for high-speed exhaust gas flows, especially for the exhaust gas flow of jet engines
DE202012003865U1 (en) * 2012-04-18 2013-07-19 Gesellschaft für Lärmschutz mbH Noise protection device for aircraft

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015270B (en) * 1952-07-25 1957-09-05 Alec David Young Sound absorber device for jet jet devices, especially aircraft jet engines
US2955418A (en) * 1958-08-06 1960-10-11 Ryan Aeronautical Co Combination augmenter, sound suppressor and thrust reverser for jet engines
DE1247750B (en) * 1964-04-20 1967-08-17 Oskar Bschorr Dipl Ing Silencer for high-speed exhaust gas flows, especially for the exhaust gas flow of jet engines
DE202012003865U1 (en) * 2012-04-18 2013-07-19 Gesellschaft für Lärmschutz mbH Noise protection device for aircraft

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