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Acoustic liner drag: a parametric study of conventional configurations
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Jones, Michael G. Howerton, Brian M. |
| Copyright Year | 2015 |
| Description | Interest in the characterization of the aerodynamic drag performance of acoustic liners has increased in the past several years. This paper details experiments in NASA Langley's Grazing Flow Impedance Tube to quantify the relative drag of several conventional perforate-over-honeycomb liner configurations. For a fixed porosity, facesheet hole diameter and cavity depth are varied to study the effect of each. These configurations are selected to span the range of conventional liner geometries used in commercial aircraft engines. Detailed static pressure and acoustic measurements are made for grazing flows up to M=0.5 at 140 dB SPL for tones between 400 and 2800 Hz. These measurements are used to calculate a resistance factor (λ) for each configuration. Analysis shows a correlation between perforate hole size and the resistance factor but cavity depth seems to have little influence. Acoustic effects on liner drag are observed to be limited to the lower Mach numbers included in this investigation. |
| File Size | 1050121 |
| Page Count | 11 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20160006010 |
| Archival Resource Key | ark:/13960/t4jm78j44 |
| Language | English |
| Publisher Date | 2015-06-22 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Acoustics Aerodynamic Drag Acoustic Measurement Drag Hole Geometry Mechanics Linings Porosity Commercial Aircraft Pressure Measurement Manufacturing Aircraft Engines Honeycomb Structures Holes Mechanics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
