Loading...
Please wait, while we are loading the content...
Similar Documents
Isolated rotor noise due to inlet distortion or turbulence
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Mani, R. |
| Copyright Year | 1974 |
| Description | Theoretical formulation, analysis, and results are presented that are necessary to analyze quadrupole noise generated from a loaded, subsonic rotor because of its interaction with an inflow distortion or inlet turbulence. The ratio of quadrupole to dipole noise is largely a function of the axial Mach number, wheel tip Mach number, rotor solidity, and total pressure ratio across the rotor. It is relatively independent of the specific form of the inflow distortion or inlet turbulence. Comparisons with experimental data only succeed in predicting gross levels at a given speed and fail to predict the variation of noise at fixed speed with flow and pressure ratio. Likely sources of this discrepancy are discussed. |
| File Size | 1423535 |
| Page Count | 47 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750002022 |
| Archival Resource Key | ark:/13960/t5z659c3x |
| Language | English |
| Publisher Date | 1974-10-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Turbulent Flow Flow Distortion Engine Noise Aircraft Noise Subsonic Flow Rotors Inlet Flow Aircraft Engines 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 |
