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- W2322978097 abstract "This paper presents noise source location results for a turbofan engine with the bypass ratio of 2.4 obtained from engine static test, in which the engine was installed on aircraft. Source location data from this test was used to develop engine inlet sound absorbing liner and to design the aircraft fuselage sound insulation device. A linear array of 32 microphones was used in this program to determine the jet noise source distribution for the exhaust and the fan noise from inlet. Aeroacoustic beamforming with the delay and sum scheme in time domain was modified using the DAMAS deconvolution algorithm. Data were obtained for the engine power setting which is from 60% to 90% of the design power. It was shown that the noise source was one centralized source from engine inlet, and the location of this centralized source was almost immobile. The multiple sources were also detected in exhaust noise, and the location of distributed source was moving backward with the increase of engine power(that is with the increase of jet velocity). The haymow spectrum was observed for the exhaust noise, and obvious tone noise was observed in the spectrum of inlet noise." @default.
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- W2322978097 date "2013-05-24" @default.
- W2322978097 modified "2023-09-22" @default.
- W2322978097 title "An Investigation of the Inlet and Exhaust Noise Sources of Turbofan Using Linear Microphone Array" @default.
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- W2322978097 doi "https://doi.org/10.2514/6.2013-2296" @default.
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