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International Journal of Rotating Machinery
Volume 2017, Article ID 7035870, 11 pages
https://doi.org/10.1155/2017/7035870
Research Article

Observations on Rotating Instabilities and Spike Type Stall Inception in a High-Speed Multistage Compressor

Laboratoire de Mécanique des Fluides et d’Acoustique, UMR CNRS 5509, Université de Lyon, Ecole Centrale de Lyon, UCB Lyon I, INSA, 36 Av. Guy de Collongue, 69134 Écully Cedex, France

Correspondence should be addressed to Johannes Schreiber; rf.noyl-ce@rebierhcs.sennahoj

Received 17 March 2017; Revised 30 June 2017; Accepted 25 July 2017; Published 28 August 2017

Academic Editor: Feng Lin

Copyright © 2017 Johannes Schreiber et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This work investigates high-frequency measurements for the contribution to the understanding of different stall inception types in high-speed multistage compressors. A 3.5-stage high-speed axial multistage compressor is investigated with a 2 MW test rig in the Laboratoire de Mécanique des Fluides et d’Acoustique (LMFA) at Ecole Centrale de Lyon, France. Two different types of instabilities arise in this compressor as a function of shaft speed. At part speed, a controversy called “rotating instability” type flow field modulation is identified with the measurements. New results are the demonstration of the periodic behavior of this instability and the analogy to classical frequency modulation, periodic to one revolution of the instability. Furthermore, the amplitude of the instability is modulated by the time period of a rotor revolution. At nominal speed, the abrupt spike type stall inception is detected, taking usually less than five rotor revolutions.