CHAOTIC TIME SERIES ANALYSIS TOOLS FOR IDENTlFICATION AND STABILIZATION OF ROTATING STALL PRECURSOR EVENTS IN HIGH SPEED COMPRESSORS

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" CHAOTIC TIME SERIES ANALYSIS TOOLS FOR IDENTlFICATION AND STABILIZATION OF ROTATING STALL PRECURSOR EVENTS IN HIGH SPEED COMPRESSORS "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	151665
Doc. No	:	ET23457
Main Entry	:	Michetle M. Bright
Title Proper	:	CHAOTIC TIME SERIES ANALYSIS TOOLS FOR IDENTlFICATION AND STABILIZATION OF ROTATING STALL PRECURSOR EVENTS IN HIGH SPEED COMPRESSORS
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	This research is a culmination of analytic and experimental results in the application of chaotic timeseries methods for rotating stall precursor identification in transonic compressors. This is the fvst knownapplication of such techniques in a turbomachinery application. The nonlinear analysis methods used inthis research are distinguished from previous methods in that they use a single pressure transducer tocapture the fluid physical dynamics to detect stall inception behavior. The major objective of this researchis two-fold: to present a new technique for stall precursor identification in high speed compressors and toreveal through preliminary open-loop control testing that nonlinear instabilities can be controlled throughjet injection. The technique to be researched is a pseudo-correlation integral method referred to as thecorrelation method. To provide a basis for comparison, the traveling wave energy technique, which hasbeen used extensively to study pre-stall data, is also briefly presented and applied. The correlation methodis shown to have a potential advantage over the traveling wave energy method, because it uses a singlesensor for detection and requires no predisposition of the data to distinguish changes in the behavior of thecompressor. The correlation integral method will identify incipient stall formation (or varying dynamics inthe compressor) for data captured from many compressor configurations. The compressors used includethe NASA Lewis single stage high speed compressor, the Allied Signal T-55 mi-centrifugal multistagecore compressor, and the NASA CC3 high speed centrifugal compressor. An additional method, the......-....,....-...,..tested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL46696.pdf
Title and statement of responsibility and	:	CHAOTIC TIME SERIES ANALYSIS TOOLS FOR IDENTlFICATION AND STABILIZATION OF ROTATING STALL PRECURSOR EVENTS IN HIGH SPEED COMPRESSORS [Thesis]