Analysis and Characteristics of Compressor Stall Precursor Signals in Forward and AFT Swept High Speed Compressor

Author

Bernard J. Frank

Date of Award

12-1993

Document Type

Thesis

Degree Name

Master of Science in Aeronautical Engineering

Department

Department of Aeronautics and Astronautics

First Advisor

Paul I. King, PhD

Abstract

The stall characteristic of four single-stage transonic compressor rotors were investigated as they were throttled to stall. Forward-swept, backward-swept, and straight leading edge rotors were examined. Three methods of analysis (1) windowed power spectrum densities of pressure and spatial Fourier coefficients, (2) phase tracking analysis, and (3) system identification were used to identify the first appearance of modal waves and their accompanying frequencies in order to identify a stall warning time. A direct correlation between the amount of stall warning time and the shape of the compressor characteristic was found. Specifically, if the compressor characteristic had a significant period of flat or positive slope, more stall warning was noted. It was also found that the forward-swept rotor consistently provided more stall warning time than the backward-swept and straight leading edge rotors.

AFIT Designator

AFIT-GAE-ENY-93D-14

DTIC Accession Number

ADA273820

Comments

The author's Vita page is omitted.

Recommended Citation

Frank, Bernard J., "Analysis and Characteristics of Compressor Stall Precursor Signals in Forward and AFT Swept High Speed Compressor" (1993). Theses and Dissertations. 6624.
https://scholar.afit.edu/etd/6624