FIELD: engines and pumps.
SUBSTANCE: invention relates to machine building, particularly to development of devices designed to suppress noise propagating in aerodynamic channels. Silencer of, primarily, bypass turbojet engine blower, comprises channel 1, circular case 3, circular grid of sections 2 and perforated screen 7. Circular case 3 embraces channel 1. Circular grid of sections 2 is arranged in inner space of case 1. Air spaces between grid adjacent sections are communicated with spaces of case 3 and channel 1. Channel section is lined with noise absorbing structures 8. Perforated screen 7 separates circular case space from channel space. Degree of perforation of said perforated screen 7 makes, at least 25 %. Distance from outlet section of channel 1 to circular grid d makes at least, 0.1 of channel diametre. Distance h from circular grid 2 to aforesaid noise absorbing lining 8 of channel h makes at least 0.1 of channel diametre. Axial length of circular grid 2 does not exceed 0.1 of diametre of channel 1.
EFFECT: higher efficiency of noise suppression.
5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SILENCER | 2007 |
|
RU2336425C1 |
| MUFFLER | 2004 |
|
RU2282042C1 |
| SILENCER (VERSIONS) | 2005 |
|
RU2291324C1 |
| SILENCER | 2004 |
|
RU2268384C1 |
| SOUND-INSULATING CASING WITH THE AERODYNAMIC ACOUSTIC SUPPRESSION SYSTEM | 2017 |
|
RU2651557C1 |
| SOUND-INSULATING CASING WITH AERODYNAMIC MUFFLERS | 2017 |
|
RU2651562C1 |
| JACKET OF TURBOJET ENGINE WITH MULTILAYER PANELS AND DRAINAGE SYSTEM | 2019 |
|
RU2716802C1 |
| SOUND-INSULATING CASING WITH AERODYNAMIC MUFFLERS | 2017 |
|
RU2660042C1 |
| NOISE MUFFLER | 2008 |
|
RU2372499C1 |
| SOUND-INSULATING CASING WITH AERODYNAMIC MUFFLERS | 2017 |
|
RU2671279C1 |
