CN103790733A - Device capable of lowering jet noise of jet aircraft - Google Patents
Device capable of lowering jet noise of jet aircraft Download PDFInfo
- Publication number
- CN103790733A CN103790733A CN201410028817.XA CN201410028817A CN103790733A CN 103790733 A CN103790733 A CN 103790733A CN 201410028817 A CN201410028817 A CN 201410028817A CN 103790733 A CN103790733 A CN 103790733A
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- China
- Prior art keywords
- jet
- noise
- aircraft
- lowering
- device capable
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Abstract
The invention discloses a device capable of lowering the jet noise of a jet aircraft. The device capable of lowering the jet noise of the jet aircraft is characterized in that four wave trappers are symmetrically arranged on the outer side of the tail portion of an exhaust valve of an aircraft engine at intervals. The device capable of lowering the jet noise of the jet aircraft has the advantages that airflow of the wave trappers rushes to the middle of the exhaust valve suddenly after passing a windward side and interferes with and is mixed with noise waves discharged by the exhaust valve, and thus the jet noise of the aircraft is lowered.
Description
Technical field
The present invention relates to aircraft noise, specifically a kind of device that can reduce jet airplane jet noise.
Background technique
The noise of airplane engine can reach 100-140 decibel, causes noise pollution, affects health, and current solution can only be based upon airport apart from urban district and residential belt place far away.
Summary of the invention
The object of this invention is to provide a kind of device that can reduce jet airplane jet noise.
The technological scheme that realizes the object of the invention is:
Can reduce a device for jet airplane jet noise, be that interval is symmetrical arranged four traps outside the afterbody of airplane engine exhaust valve.
Described trap is a leg-of-mutton projection in obtuse angle.
The high 0.3-0.5 rice of described trap, long 1 meter.
Advantage of the present invention is: the air-flow of trap washes away to exhaust valve middle part suddenly behind windward side, mixes, to reduce aircraft jet noise with the noise waves interference that exhaust valve is discharged.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram that the present invention can reduce jet airplane jet noise;
Fig. 2 is the worm's eye view of Fig. 1.
In figure: 1. exhaust valve 2. traps.
Embodiment
With reference to Fig. 1-2, a kind of device that can reduce jet airplane jet noise, is that interval is symmetrical arranged four high 0.3-0.5 rice outside the afterbody of airplane engine exhaust valve 1, the trap 2 of long 1 meter, and trap 2 is a leg-of-mutton projection in obtuse angle.
Claims (3)
1. the device that can reduce jet airplane jet noise, is characterized in that: outside the afterbody of airplane engine exhaust valve, interval is symmetrical arranged four traps.
2. device according to claim 1, is characterized in that: described trap is a leg-of-mutton projection in obtuse angle.
3. device according to claim 1, is characterized in that: the high 0.3-0.5 rice of described trap, long 1 meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410028817.XA CN103790733A (en) | 2014-01-22 | 2014-01-22 | Device capable of lowering jet noise of jet aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410028817.XA CN103790733A (en) | 2014-01-22 | 2014-01-22 | Device capable of lowering jet noise of jet aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103790733A true CN103790733A (en) | 2014-05-14 |
Family
ID=50666721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410028817.XA Pending CN103790733A (en) | 2014-01-22 | 2014-01-22 | Device capable of lowering jet noise of jet aircraft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103790733A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786016A (en) * | 1986-04-30 | 1988-11-22 | United Technologies Corporation | Bodies with reduced surface drag |
| JP2004076596A (en) * | 2002-08-12 | 2004-03-11 | Ishikawajima Harima Heavy Ind Co Ltd | Lobe mixer |
| CN101031713A (en) * | 2004-09-29 | 2007-09-05 | Snecma固体燃料推进器公司 | Mixer for separate-flow nozzle |
| CN101970843A (en) * | 2007-08-17 | 2011-02-09 | 空中巴士营运公司 | Turboshaft engine with reduced noise emission for aircraft |
| CN102439282A (en) * | 2009-05-20 | 2012-05-02 | 斯奈克玛 | Cowling for a turbine engine nozzle provided with side fins for reducing the noise of the jet |
-
2014
- 2014-01-22 CN CN201410028817.XA patent/CN103790733A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786016A (en) * | 1986-04-30 | 1988-11-22 | United Technologies Corporation | Bodies with reduced surface drag |
| JP2004076596A (en) * | 2002-08-12 | 2004-03-11 | Ishikawajima Harima Heavy Ind Co Ltd | Lobe mixer |
| CN101031713A (en) * | 2004-09-29 | 2007-09-05 | Snecma固体燃料推进器公司 | Mixer for separate-flow nozzle |
| CN101970843A (en) * | 2007-08-17 | 2011-02-09 | 空中巴士营运公司 | Turboshaft engine with reduced noise emission for aircraft |
| CN102439282A (en) * | 2009-05-20 | 2012-05-02 | 斯奈克玛 | Cowling for a turbine engine nozzle provided with side fins for reducing the noise of the jet |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140514 |