Loading...
Please wait, while we are loading the content...
Similar Documents
Effect of inflow control on inlet noise of a cut-on fan. [in an anechoic chamber
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Glaser, F. W. Woodward, R. P. |
| Copyright Year | 1980 |
| Description | The control of turbulence and other inflow disturbances in anechoic chambers for static turbofan noise studies was studied. A cut-on, high tip speed fan stage was acoustically tested with three configurations of an inflow control device in an anechoic chamber. Although this was a cut-on design, rotor inflow interaction appeared to be a much stronger source of blade passing tone radiated from the inlet than rotor stator interaction for the 1.6 mean rotor chord separation. Aft external suction applied to the area where the inflow control device joined the inlet produced a further reduction in blade passing tone, suggesting that disturbances in the forward flow on the outside of the inlet were superimposed on the inlet boundary layer and were a significant source of tone noise. |
| File Size | 5541693 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800014609 |
| Archival Resource Key | ark:/13960/t3dz52d03 |
| Language | English |
| Publisher Date | 1980-01-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Anechoic Chambers Air Intakes Engine Noise Noise Reduction Turbofans Rotors Rotor Stator Interactions Control Equipment Stators Inlet Flow Static Tests Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
