GB877532A - Improvements in sound attenuators for exhaust gases - Google Patents
Improvements in sound attenuators for exhaust gasesInfo
- Publication number
- GB877532A GB877532A GB2359460A GB2359460A GB877532A GB 877532 A GB877532 A GB 877532A GB 2359460 A GB2359460 A GB 2359460A GB 2359460 A GB2359460 A GB 2359460A GB 877532 A GB877532 A GB 877532A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rods
- spacers
- fret
- vibrate
- housing
- 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
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- 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
- F02K1/78—Other construction of jet pipes
- F02K1/82—Jet pipe walls, e.g. liners
- F02K1/827—Sound absorbing structures or liners
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
877,532. Exhaust-silencers. LEMMERMAN Inc., C. W. July 6, 1960, No. 23594/60. Class 7(2). [Also in Group XXVI] An aircraft gas turbine tail section acting as a silencer for exhaust gases comprises a housing 16, a plurality of axially extending elongate vibratory rods 22 fixed at each end to annular end rings 24, 26 and maintained under tension in a cylindrical array within and concentrically spaced inwardly of the housing, and a part-annular fret 34 mounted to engage a portion of the rods in a plane transverse to the housing axis, the fret being positioned transversely of the rods to divide them into axial portions isolated to vibrate independently. As shown, four spacers 28 are fixed between the two end-rings 24, 26, at equal circumferential intervals and an equal number of axially offset arcuate frets 34, 36, 46, 48 are attached to the spacers one fret being disposed between adjacent pairs of spacers. The frets are so positioned between the spacers that the fundamental frequency of one axial portion of the divided rods is a multiple of the fundamental frequency of the other portion. The rods are welded to a V-shaped inner ridge on members 24, 26 with the ends 30, 32 extending beyond the member 24, 26. These ends vibrate as clamped free bars at a very high frequency. The rods are preferably of stainless steel and of a diameter to vibrate at a frequency determined by the tension thereof. A diffuser (not shown) clamps to a flange 18.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US746268A US2965190A (en) | 1958-07-02 | 1958-07-02 | Jet engine muffler |
GB2359460A GB877532A (en) | 1960-07-06 | 1960-07-06 | Improvements in sound attenuators for exhaust gases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2359460A GB877532A (en) | 1960-07-06 | 1960-07-06 | Improvements in sound attenuators for exhaust gases |
Publications (1)
Publication Number | Publication Date |
---|---|
GB877532A true GB877532A (en) | 1961-09-13 |
Family
ID=10198207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2359460A Expired GB877532A (en) | 1958-07-02 | 1960-07-06 | Improvements in sound attenuators for exhaust gases |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB877532A (en) |
-
1960
- 1960-07-06 GB GB2359460A patent/GB877532A/en not_active Expired
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