The stable operating range of axial compressors is limited by the onset of rotating stall
and surge. Mass injection upstream of the tip of an axial compressor rotor is a stability enhancement
approach which can be effective in suppressing stall in tip-critical rotors, and thus increasing
the operating range of compressors. In this article, investigations on active flow
control related to the rotor tip gap sensitivity are discussed. The experiments were performed
in a 1.5-stage low-speed research compressor. Measurements at part speed (80 per cent) and full
speed (100 per cent) with varying injection rates are discussed. These tests were performed for
two rotor tip clearances of 1.3 per cent and 4.3 per cent of rotor blade tip chord. Results on the
compressor map, the flow field as well as transient measurements to identify the stall inception
are discussed. Supplementary, the numerical results are compared to the experiments based on
the configuration with the greatest benefit in operating range enhancement.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:38436 |
| Date | 03 June 2019 |
| Creators | Künzelmann, M., Urban, R., Mailach, R., Vogeler, K. |
| Publisher | Sage |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 10.1177/0957650911418150 |
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