Abstract
This paper presents results obtained as part of an ongoing proof of concept program being carried out by the University of Nevada, Reno and the NASA Glenn Research Center. The goal of this program is to develop passive acoustic methods which can be applied to determine the performance of jet engines and/or turbines. Six (6) acoustic transducers were mounted around a ring on a High Pressure Burner Rig (HPBR) located at the NASA Glenn Research Center. Data were recorded using a multi-track Sony digital data recorder. The HPBR was operated over several hours using a prescribed duty cycle of different fuel/air mixtures. Several signal processing methods were applied to this data including time-frequency and correlation techniques. Some very interesting results were obtained and are presented in this paper including the ability to determine the fuel/air mixtures on a continuing basis using only passive acoustic signature analysis methods.
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