This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Design of a Quiet Inlet for a 6×6 Boundary Layer Flow Duct
Technical Paper
2011-01-1617
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The turbulent boundary layer (TBL) that forms on the outer skin of the aircraft in flight is a significant source of interior noise. However, the existing quiet test facilities capable of measuring the TBL wall pressure fluctuations tend to be at low Mach numbers. The objective of this study was to develop a new inlet for an existing six inch square (or 6×6) flow duct that would be adequately free from facility noise to study the TBL wall pressure fluctuations at higher, subsonic Mach numbers. First, the existing flow duct setup was used to measure the TBL wall pressure fluctuations. Then the modified inlet was successfully used to make similar measurements up to Mach number of 0.6. These measurements will be used in the future to validate wall pressure spectrum models for interior noise analysis programs such as statistical energy analysis (SEA) and dynamic energy analysis (DEA).
Recommended Content
| Technical Paper | The Design Considerations of an Anechoic Chamber |
| Technical Paper | Flight Investigation of Cabin Noise Control Treatments for a Light Turboprop Aircraft |
| Technical Paper | Test Bench for the Acoustic Behaviour of Air-Boxes for Motorcycles |
Authors
Citation
Miller, T., Lee, S., Holup, G., Gallman, J. et al., "Design of a Quiet Inlet for a 6×6 Boundary Layer Flow Duct," SAE Technical Paper 2011-01-1617, 2011, https://doi.org/10.4271/2011-01-1617.Also In
References
- Gallman, J. Kunze, R. Breer, M. “Measurement of the Boundary Layer Growth Due to Transpiration Flow Through Nacelle Acoustic Liners,” 20th AIAA Applied Aerodynamics Conference, AIAA 2002-3063
- Drouin, M Gallman, J. Olsen, R. “Sound Level Effect on Perforated Panel Boundary Layer Growth,” 27 th AIAA Aeroacoustics Conference, AIAA-2006-2411
- Goody, M. “Empirical Spectral Model of Surface Pressure Fluctuations,” AIAA Journal 42 9 Sept. 2004 1788 1794
- Efimtsov, B.M. “Characteristics of the Field of Turbulent Wall Pressure Fluctuations at Large Reynolds Numbers,” Soviet Physics- Acoustics 28 4 Jul. Aug. 1982 289 292
- Simpson, R.L. Ghodbane, M. McGrath, B.E. “Surface Pressure Fluctuations in a Separating Turbulent Boundary Layer,” Journal of Fluid Mechanics 177 1987 167 186