47th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition 2009
DOI: 10.2514/6.2009-624
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The Advanced Noise Control Fan Baseline Measurements

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Cited by 23 publications
(14 citation statements)
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“…Tones Power Levels (PWL) are computed from the measured Sound Pressure Level (SPL) at the BPFs up to the 6 th fan harmonics for each microphone. Other dynamic and static pressure probes are also available in the measurements 14,15 . More recent measurements 14 include flow characterizations using hot-film anemometer as well as dedicated aerodynamic performance measurements 16 including further static and total pressure probe rakes allowing mass flow as well as shaft axial velocities measurements.…”
Section: Available Far Field Acoustic Measurementsmentioning
confidence: 99%
See 1 more Smart Citation
“…Tones Power Levels (PWL) are computed from the measured Sound Pressure Level (SPL) at the BPFs up to the 6 th fan harmonics for each microphone. Other dynamic and static pressure probes are also available in the measurements 14,15 . More recent measurements 14 include flow characterizations using hot-film anemometer as well as dedicated aerodynamic performance measurements 16 including further static and total pressure probe rakes allowing mass flow as well as shaft axial velocities measurements.…”
Section: Available Far Field Acoustic Measurementsmentioning
confidence: 99%
“…Results in this area are sensitive to the geometry and missing details or parts can explain the discrepancy. A complete description of the ANCF facility is available in publications 14,15 for comparison. The absence of tip clearance and outlet shaft are also good candidates to explain the differences.…”
Section: B Far-field Sound Pressure Levelsmentioning
confidence: 99%
“…For details of how the data were acquired and processed see reference 10. Keep in mind that the liners were not individually designed for optimum attenuation, but rather to validate the design and manufacture process.…”
Section: Resultsmentioning
confidence: 99%
“…Figure 5 shows the far-field directivity of the generated mode at AE modes and M ¼ 0 or À0.12. Far-field acoustic directivities 14 were acquired using 30 microphones placed at a 12 ft radius from the duct centerline and 10 ft high. Fifteen of these were in an arc about the inlet exit plane (0 -90 measured from the inlet axis) and 15 were in an arc about the exhaust exit plane (90 -165 with 180 being the exhaust axis).…”
Section: Horizontal Orientationmentioning
confidence: 99%