CN104314189A - Complete anechoic chamber for rotor noise test - Google Patents
Complete anechoic chamber for rotor noise test Download PDFInfo
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- CN104314189A CN104314189A CN201410424690.3A CN201410424690A CN104314189A CN 104314189 A CN104314189 A CN 104314189A CN 201410424690 A CN201410424690 A CN 201410424690A CN 104314189 A CN104314189 A CN 104314189A
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- anechoic chamber
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- room
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Abstract
The invention discloses a complete anechoic chamber for a rotor noise test, and belongs to the technical field of helicopter rotor tests. The complete anechoic chamber is characterized in that an air inlet is formed in the upper part of the anechoic chamber; an air exhaust is formed in the lower part of the anechoic chamber; a rotor test rig is fixed in the center of the air exhaust duct and stretches into the anechoic chamber; the air inlet and the air exhaust are annular; sound-absorbing linings are installed on the inner walls of an air inlet duct and an air exhaust duct; annular cylindrical array silencers are arranged at each of the air inlet and the air exhaust; a rotor center is positioned in a central position in the height direction of the anechoic chamber; the silencers at the air inlet and the air exhaust of the anechoic chamber and the sound-absorbing linings on the inlet duct and the air exhaust duct of the anechoic chamber use metal surfaces. Different from the conventional complete anechoic chamber, the complete anechoic chamber provided by the invention is provided with an airflow channel for large-flow airflow to pass through and takes effective sound-slickening and sound-insulating measures on the airflow channel, so that a free sound field is formed in the anechoic chamber and leaking noises meet environment-friendly requirements; a high-power rotor test rig is arranged inside the anechoic chamber and a rotor with relatively large size can run in the anechoic chamber, so that a noise test is wider in range and better in effect.
Description
Technical field
The invention belongs to lifting airscrew experimental technique field, be specifically related to a kind of rotor noise test whole elimination room.
Background technology
Sound attenuation room is a kind of audio acoustic fundamental test room manufactured and designed especially specially.In order to accurately measure the characteristic of sound source, sound source should be placed on one and not have noisy ideal space, such space is called " free found field ", the free found field that people are similar in indoor foundation, and Here it is " sound attenuation room ".
Sound attenuation room shape mostly is square or rectangle.Sound attenuation room adopts full-closed structure usually, by arranging soundproof door with turnover.
Be 200910046035.8 at number of patent application in prior art, patent name: ultra-low background noise whole elimination room, the applying date: on the books in 2009.2.10 document.
Rotor noise test sound attenuation room is the test facilities carrying out rotor noise experimental test.The tested main body of rotor noise test is helicopter model rotor system, and rotor system need be arranged on Rotor Test stand and test.Common whole elimination room all arranges sound absorption material due to inside, heavy high-power test stand can not be supported, in addition, when carrying out Rotor Test, large discharge air-flow pass through rotor disk, if sound attenuation room is closure designs, then can produces reflux and the pressure fluctuation phenomenon of air-flow in sound attenuation room, thus affect the test effect of Rotor Test.In view of above reason, the Airflow Environment that the configuration of rotor noise test room sound attenuation room must meet Rotor Test simultaneously requires and noise testing demand.
Summary of the invention
Object of the present invention:
Design a kind of whole elimination room for lifting airscrew noise testing.It both can meet the acoustic enviroment requirement of rotor noise test by Configuration Design, met the requirement of rotor running to air circulation simultaneously.
Technical scheme of the present invention:
The object of the present invention is achieved like this:
A kind of rotor noise test whole elimination room, it is characterized in that, sound attenuation room top has air inlet road junction, and bottom has exhaust road junction, and Rotor Test stand is fixed on exhaust duct central authorities, stretches into sound attenuation room.
Described air inlet road junction and exhaust road junction are annular.
Described air intake duct and exhaust duct inwall install sound absorption lining.
Described air inlet road junction and exhaust road junction are evenly equipped with circular cylindrical array type silencer.
Described rotor centers is positioned at the center of sound attenuation room height.
Described sound attenuation room air inlet road junction and exhaust road junction sound absorber and air intake duct, exhaust duct sound absorption lining all adopt metal surface.
Sound attenuation room periphery is closed by Sound insulation for building structure, to reach sound insulation object.Sound attenuation room is by vibration isolation elastic construction supporting seat in out-building, and vibration isolation elastic construction is used for isolated extraneous vibration interference.Sound attenuation room top has circular air inlet road junction, and sound attenuation room bottom has circular row gas port, and inlet and outlet road inwall installs sound absorption lining, reduces noise reflection in passage.Inlet and outlet road junction is evenly equipped with circular cylindrical array type silencer, is ensureing that under the prerequisite that air-flow passes through, isolated outside noise disturbs and prevents internal noise from leaking.The air total flow that runner passes through is greater than rotor lift flow, can not produce and backflow and pressure fluctuation phenomenon.When the throughput passed through when gas channel in test reaches 200m3/s, the pressure loss of sound absorber is not more than 3pa.High-power Rotor Test stand is supported by reinforced concrete upright column and is fixed on exhaust duct central authorities, and rotor centers is positioned at the center of sound attenuation room height, is conducive to arranging microphone everywhere around it, to meet different testing requirements.Sound attenuation room wedge, the silencing equipments such as inlet and outlet road junction sound absorber and inlet and outlet road sound absorption lining all adopt metal surface, under the environment of Rotor Test, have best anti-gas shock ability.
Key point of the present invention:
Key point 1: a kind of rotor noise test whole elimination room, sound attenuation room structure is different from conventional hermetic whole elimination room, sound attenuation room is provided with air intake duct and exhaust duct, is the whole elimination room not exclusively closed having air flow passage for rotor noise test is custom-designed.
Key point 2: a kind of rotor noise test whole elimination room, inlet and outlet road junction is furnished with circular cylindrical array type silencer, and while allowing air-flow to pass through, effectively isolated outside noise disturbs and prevents internal noise from leaking.
Key point 3: a kind of rotor noise test whole elimination room, the high-power rotor model.test system of sound attenuation room internal fixtion, can carry out 4 rice diameter Rotor Tests.
Key point 4: a kind of rotor noise test whole elimination room, silencing equipment surface is metal material, compared with the silencing equipments such as common textile material surface wedge, under the environment of Rotor Test, there is best anti-gas shock ability, and there is attractive in appearance, environmental protection, fire prevention and the advantage such as easy to clean.
Beneficial effect of the present invention:
A kind of whole elimination room of applicable rotor noise test, with conventional whole elimination room unlike, be provided with and allow the gas channel that passes through of large flow-rate gas stream, and effective noise elimination, sound insulation means are taked to gas channel, make formation sound free sound field in sound attenuation room, the noise that leaks meets environmental requirement.Inside establish high-power rotor model.test system, allow to run large-size rotor, noise testing is wider, effective.
Accompanying drawing explanation
Fig. 1 is the structural representation of this invention
1-intake muffler 2-air intake duct 3-Sound insulation for building structure 4-sound attenuation room 5-rotor model.test system 6-vibration isolation elastic construction 7-exhaust duct 8-reinforced concrete upright column 9-exhaust silencer
Detailed description of the invention
Accompanying drawings 1, the present invention forms outer sound insulation building by Sound insulation for building structure 3, extraneous sound source air-borne sound and solid-borne sound transmission is effectively isolated, forms the indoor environment compared with low noise.It is inner that sound attenuation room 4 is supported in Sound insulation for building structure 3 by vibration isolation elastic construction 6, and inside sound attenuation room, wall is uniform puts wedge absorber.Sound attenuation room 4 top has circular air inlet road junction 2, and sound attenuation room bottom has circular row gas port 7, and inlet and outlet road inwall installs sound absorption lining, reduces noise reflection in passage.Be furnished with circular cylindrical array type silencer 1 above air inlet road junction, exhaust is furnished with circular cylindrical array type silencer 9 below road junction, is ensureing that under the prerequisite that air-flow passes through, isolated outside noise disturbs and prevents internal noise from leaking.The air total flow that runner passes through is greater than rotor lift flow, can not produce and backflow and pressure fluctuation phenomenon.
High-power rotor model.test system 5 is supported by reinforced concrete upright column 8 and is fixed on exhaust duct central authorities, and rotor centers is positioned at the center of sound attenuation room height.
Claims (6)
1. a rotor noise test whole elimination room, it is characterized in that, sound attenuation room top has air inlet road junction, and bottom has exhaust road junction, and Rotor Test stand is fixed on exhaust duct central authorities, stretches into sound attenuation room.
2. rotor noise test whole elimination room according to claim 1, described air inlet road junction and exhaust road junction are annular.
3. rotor noise test whole elimination room according to claim 1, described air intake duct and exhaust duct inwall install sound absorption lining.
4. rotor noise test whole elimination room according to claim 1, described air inlet road junction and exhaust road junction are evenly equipped with circular cylindrical array type silencer.
5. rotor noise test whole elimination room according to claim 1, described rotor centers is positioned at the center of sound attenuation room height.
6. rotor noise according to claim 1 test whole elimination room, described sound attenuation room air inlet road junction and exhaust road junction sound absorber and air intake duct, exhaust duct sound absorption lining all adopt metal surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424690.3A CN104314189B (en) | 2014-08-26 | 2014-08-26 | A kind of rotor noise tests whole elimination room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424690.3A CN104314189B (en) | 2014-08-26 | 2014-08-26 | A kind of rotor noise tests whole elimination room |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104314189A true CN104314189A (en) | 2015-01-28 |
| CN104314189B CN104314189B (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410424690.3A Active CN104314189B (en) | 2014-08-26 | 2014-08-26 | A kind of rotor noise tests whole elimination room |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092204A (en) * | 2015-07-24 | 2015-11-25 | 南京航空航天大学 | Apparatus used for helicopter rotor blade-vortex interference noise experiment |
| CN106996204A (en) * | 2017-05-04 | 2017-08-01 | 中国航发沈阳发动机研究所 | A kind of anechoic room for Fan/Compressor Operated aerodynamic noise test |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1666251A (en) * | 2002-04-26 | 2005-09-07 | 出光兴产株式会社 | Sound absorbing body, sound absorbing structure, and method for manufacturing sound absorbing structure |
| RU2275476C1 (en) * | 2005-03-24 | 2006-04-27 | Государственное Унитарное Предприятие "Водоканал Санкт-Петербурга" | Noise-protective structure |
| CN201162278Y (en) * | 2008-03-07 | 2008-12-10 | 蓝军 | Audiometric laboratory |
| CN201202185Y (en) * | 2008-05-14 | 2009-03-04 | 鹤壁市绿色环保生产有限公司 | Efficient sound control room |
| CN101644476A (en) * | 2008-08-05 | 2010-02-10 | 株式会社海广 | Exhaust system of dust free room and construction method thereof |
-
2014
- 2014-08-26 CN CN201410424690.3A patent/CN104314189B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1666251A (en) * | 2002-04-26 | 2005-09-07 | 出光兴产株式会社 | Sound absorbing body, sound absorbing structure, and method for manufacturing sound absorbing structure |
| RU2275476C1 (en) * | 2005-03-24 | 2006-04-27 | Государственное Унитарное Предприятие "Водоканал Санкт-Петербурга" | Noise-protective structure |
| CN201162278Y (en) * | 2008-03-07 | 2008-12-10 | 蓝军 | Audiometric laboratory |
| CN201202185Y (en) * | 2008-05-14 | 2009-03-04 | 鹤壁市绿色环保生产有限公司 | Efficient sound control room |
| CN101644476A (en) * | 2008-08-05 | 2010-02-10 | 株式会社海广 | Exhaust system of dust free room and construction method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092204A (en) * | 2015-07-24 | 2015-11-25 | 南京航空航天大学 | Apparatus used for helicopter rotor blade-vortex interference noise experiment |
| CN106996204A (en) * | 2017-05-04 | 2017-08-01 | 中国航发沈阳发动机研究所 | A kind of anechoic room for Fan/Compressor Operated aerodynamic noise test |
| CN106996204B (en) * | 2017-05-04 | 2019-09-06 | 中国航发沈阳发动机研究所 | A kind of anechoic room for fan forced grade aerodynamic noise test |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104314189B (en) | 2017-12-29 |
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