Loading...
Please wait, while we are loading the content...
Similar Documents
Improved method for design of expansion-chamber mufflers with application to operational helicopter
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Parrott, T. L. |
| Copyright Year | 1974 |
| Description | Field test of muffler designed with aid of this method was conducted on helicopter with known exhaust-noise problem. When exhaust noises were compared for hover-flight conditions, muffler system was found to reduce exhaust noise by approximately 11 db. No significant degradation in engine performance was observed. |
| File Size | 67205 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730000471 |
| Archival Resource Key | ark:/13960/t74v1cj72 |
| Language | English |
| Publisher Date | 1974-03-01 |
| Access Restriction | Open |
| Subject Keyword | Mufflers Noise Reduction Aircraft Noise Cdc 6000 Series Computers Helicopter Design Acoustic Attenuation Computer Programs Exhaust Systems Fortran Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |