The data processing of static engine noise test, especially the elimination of ground reflection to access the free-field sound pressure level, has been defined as one of the basic steps in aircraft noise prediction on the noise certification procedure by ICAO. Based on the importance of the method, this paper will study the impact of the ground reflection effects on the aircraft engine noise experimental, especially made a detailed overview for the calculation method of reflective index. This paper also gives the method of fixing this effect to get the free field sound pressure level, while making experiments to verify the feasibility of this method, so that make the noise analysis and prediction according to the noise certification procedures.
The Analysis on the Effect of Ground Reflection in the Noise Test of Aircraft Engine
2013
5 Seiten
Aufsatz (Konferenz)
Englisch
Ground reflection effects on aircraft flyover noise
AIAA | 1980
|Ground noise suppressors for aircraft engine operation
AIAA | 1975
|General aviation aircraft engine noise test facility
AIAA | 2000
|Ground Reflection of Jet Noise
NTRS | 1958
|