Preliminary Study on Acoustic Detection of Faults Experienced by a High-Bypass Turbofan Engine

Boyle, Devin K.

PID  :  NTRS Document ID: 20140010472
RP-ID  :  AFRC-E-DAA-TN15764

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The vehicle integrated propulsion research (VIPR) effort conducted by NASA and several partners provided an unparalleled opportunity to test a relatively low TRL concept regarding the use of far field acoustics to identify faults occurring in a high bypass turbofan engine. Though VIPR Phase II ground based aircraft installed engine testing wherein a multitude of research sensors and methods were evaluated, an array of acoustic microphones was used to determine the viability of such an array to detect failures occurring in a commercially representative high bypass turbofan engine. The failures introduced during VIPR testing included commanding the engine's low pressure compressor (LPC) exit and high pressure compressor (HPC) 14th stage bleed values abruptly to their failsafe positions during steady state