Development of multiple cells with short length-scale stall in an axial compressor rotor

Masahiro Inoue, Motoo Kuroumaru, Tadakazu Tanino, Seiichirou Maeda, Masato Furukawa

Research output: Contribution to journalArticle

Abstract

Evolution of multiple stall cells with short length-scale in an axial compressor rotor was investigated experimentally. In a low-speed research compressor rotor tested, a short length-scale stall cell appeared at first, but did not grow rapidly in size unlike a so-called "spike-type stall inception" observed in many multi-stage compressors. Alternatively, the number of cells increased to a certain stable state (a mild stall state) under a fixed throttle condition. In the mild stall state the multiple stall cells, size of which was on the same order of the inception cell (of a few blade spacings), were rotating at 72% of rotor speed and at intervals of 4.8 blade spacings. With further throttling, a long length-scale wave appeared overlapping the multiple short length-scale waves, then developed to a deep stall state with a big cell. The ensemble averages of the axial velocity components upstream and downstream of the rotor, which were obtained phase-locked to the cell rotation, showed that the stall cells were of a part-span type.

Original languageEnglish
Pages (from-to)4021-4026
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume65
Issue number640
DOIs
Publication statusPublished - Dec 1999

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compressor rotors
turbocompressors
Compressors
Rotors
cells
blades
Turbomachine blades
spacing
throttling
rotor speed
spikes
upstream
rotors
low speed
intervals

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Development of multiple cells with short length-scale stall in an axial compressor rotor. / Inoue, Masahiro; Kuroumaru, Motoo; Tanino, Tadakazu; Maeda, Seiichirou; Furukawa, Masato.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 65, No. 640, 12.1999, p. 4021-4026.

Research output: Contribution to journalArticle

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AU - Furukawa, Masato

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AB - Evolution of multiple stall cells with short length-scale in an axial compressor rotor was investigated experimentally. In a low-speed research compressor rotor tested, a short length-scale stall cell appeared at first, but did not grow rapidly in size unlike a so-called "spike-type stall inception" observed in many multi-stage compressors. Alternatively, the number of cells increased to a certain stable state (a mild stall state) under a fixed throttle condition. In the mild stall state the multiple stall cells, size of which was on the same order of the inception cell (of a few blade spacings), were rotating at 72% of rotor speed and at intervals of 4.8 blade spacings. With further throttling, a long length-scale wave appeared overlapping the multiple short length-scale waves, then developed to a deep stall state with a big cell. The ensemble averages of the axial velocity components upstream and downstream of the rotor, which were obtained phase-locked to the cell rotation, showed that the stall cells were of a part-span type.

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