YC-15 EBF (Externally-Blown Flap) STOL (Short Takeoff and Landing) Airplane Fuselage and Interior Noise Environment.

reportActive / Technical Report | Accession Number: ADA131462 | Open PDF

Abstract:

The purpose of this effort was to investigate the exterior fuselage and interior noise of the USAFMcDonnell-Douglas YC-15 Advanced Medium-Range Short-Takeoff- and Landing Transport airplane. This aircraft employs an under-the-wing, externally-blown-flap powered lift system designed to create augmented lift, which creates an intense acoustic environment. The blowing of the flap produces higher noise levels at lower frequencies than does the jet alone, increasing the acoustic environment of the fuselage and inside the cabin. A combination of exterior flush-mounted microphones, accelerometers, interior centerline and sidewall microphones were used during this investigation. Test conditions analyzed included takeoff, cruise, landing, taxi, and ground static over the full range of operating conditions. The effects of different flight parameters are displayed in the form of the octave, one-third octave, and narrowband plots and are compared to the changes on the acoustic environment. Author

Author(s):
Miller, Vincent R.
Author Organization(s):
AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH
Descriptive Note:
Final technical rept. Oct 81-Feb 83,
Pagination:
0081

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFWAL-TM-83-170-FIBE
Task Number(s):
01
Project Number(s):
2401
 Subject Terms
Joint Capability Areas:
JCA_6.3.3_Spectrum Management; JCA_6_Net Centric; JCA_6.3_Net Management; JCA_6.1_Information Transport; JCA_6.2.1_Information Sharing; JCA_6.2.2_Computing Services; JCA_1_Force Support; JCA_4.1_Deployment and Distribution; JCA_5_Command and Control; JCA_JCA_4.1.2_Sustain the Force; JCA_6.2_Enterprise Services; JCA_5.3_Planning; JCA_8_Building Partnerships
Modernization Areas:
Microelectronics; 5G
Communities of Interest:
Air Platforms
Descriptor(s):
*Short takeoff aircraft, *Flaps(Control surfaces), *Noise, Fuselages, Aircraft cabins, External, Internal, Level(Quantity), Acoustics, Noise reduction, Transport aircraft, Powered lift, Environments, Acoustic measurement, Test equipment, Test methods
Field(s)/Group(s):
Transport Aircraft, VSTOL, Acoustics
Keyword(s):
YC 15 aircraft, Externally blown flaps, Power lift noise, Acoustic loads, Exterior noise, Internal noise, PE62201F, WUAFWAL24010146
Report Date:
1983 May 01