Acoustic Measurements from a Rotor Blade-Vortex Interaction Noise Experiment in the German-Dutch Wind Tunnel (DNW)

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Abstract:

Acoustic data are presented from a 40-percent-scale model of the four-bladed BO-105 helicopter main rotor, tested in a large aeroacoustic wind tunnel. Rotor blade-vortex interaction BVI noise data in the low-speed flight range were acquired using a traversing in-flow microphone array. The experimental apparatus, testing procedures, calibration results, and experimental objectives are fully described. A large representative set of averaged acoustic signals are presented.

Author(s):
Martin, R. M. ; Splettstoesser, W. R. ; Elliott, J. W. ; Schultz, K. -j.
Author Organization(s):
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER
Descriptive Note:
Technical memo.
Pagination:
0182

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NASA-L-16368, AVSCOM-TR-87-B-4
Project Number(s):
1L161102AH45
Monitor Series:
TM-4024, NASA
 Subject Terms
Joint Capability Areas:
JCA_3_Force Application; JCA_3.1.1_Maneuver to Engage; JCA_3.1_Maneuver; JCA_6_Net Centric; JCA_6.3.3_Spectrum Management; JCA_3.2_Engagement; JCA_3.2.1_Kinetic Means; JCA_5_Command and Control; JCA_5.3_Planning; JCA_6.3_Net Management; JCA_1.2.7_Experimentation; JCA_6.1_Information Transport; JCA_6.2.1_Information Sharing; JCA_6.2.2_Computing Services; JCA_6.2_Enterprise Services
Modernization Areas:
Fully Networked C3; Directed Energy
Communities of Interest:
Air Platforms
Descriptor(s):
*AERODYNAMIC NOISE, *ROTOR BLADES(ROTARY WINGS), *WIND TUNNELS, ACOUSTIC DATA, ACOUSTIC MEASUREMENT, ACOUSTIC SIGNALS, AERODYNAMIC CHARACTERISTICS, CALIBRATION, FLIGHT, GRAPHS, HELICOPTER ROTORS, INTERACTIONS, LOW VELOCITY, SOUND TRANSMISSION, VORTICES, WIND TUNNEL TESTS
Field(s)/Group(s):
Test Facilities, Equipment and Methods, Acoustics
Keyword(s):
BO 105 AIRCRAFT, ASH45, PE61102A
Report Date:
1988 Mar 01