Interior noise ground tests conducted on a DC-9 aircraft test section are described. The objectives were to study ground test and analysis techniques for evaluating the effectiveness of interior noise control treatments for advanced turboprop aircraft, and to study the sensitivity of the ground test results to changes in various test conditions. Noise and vibration measurements were conducted under simulated advanced turboprop excitation, for two interior noise control treatment configurations. These ground measurement results were compared with results of earlier UHB (Ultra High Bypass) Demonstrator flight tests with comparable interior treatment configurations. The Demonstrator is an MD-80 test aircraft with the left JT8D engine replaced with a prototype UHB advanced turboprop engine.
Analysis of Interior Noise Ground and Flight Test Data for Advanced Turboprop Aircraft Applications
1991
66 pages
Report
Keine Angabe
Englisch
Aircraft , Acoustics , Aircraft compartments , Aircraft noise , Control systems design , Engine noise , Ground tests , Noise reduction , Turboprop aircraft , Turboprop engines , Acoustic excitation , Bypasses , Dc 9 aircraft , Flight tests , Noise measurement , Prototypes , Structural vibration , Test chambers
Comparison of Advanced Turboprop Interior Noise Control Ground and Flight Test Data
British Library Conference Proceedings | 1992
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