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타이틀	Modeling and Detection of Ice Particle Accretion in Aircraft Engine Compression Systems
저자	May, Ryan D.;; Simon, Donald L.;; Guo, Ten-Huei
Keyword	AIRCRAFT SAFETY;; ASTRONOMICAL MODELS;; COMMERCIAL AIRCRAFT;; DATA COMPRESSION;; DETECTION;; ICE FORMATION;; LOW PRESSURE;; SIMULATION
URL	http://hdl.handle.net/2060/20120016690
보고서번호	NASA/TM-2012-217742
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	The accretion of ice particles in the core of commercial aircraft engines has been an ongoing aviation safety challenge. While no accidents have resulted from this phenomenon to date, numerous engine power loss events ranging from uneventful recoveries to forced landings have been recorded. As a first step to enabling mitigation strategies during ice accretion, a detection scheme must be developed that is capable of being implemented on board modern engines. In this paper, a simple detection scheme is developed and tested using a realistic engine simulation with approximate ice accretion models based on data from a compressor design tool. These accretion models are implemented as modified Low Pressure Compressor maps and have the capability to shift engine performance based on a specified level of ice blockage. Based on results from this model, it is possible to detect the accretion of ice in the engine core by observing shifts in the typical sensed engine outputs. Results are presented in which, for a 0.1 percent false positive rate, a true positive detection rate of 98 percent is achieved.