The unsteady flow in a single-stage axial flow compressor at different operating conditions has been investigated with hot-wire and hot-film probes to find out the influence of the aerodynamic compressor load on the periodic fluctuations. These results are compared with measurements in the last stages of a multistage high-pressure compressor of a gas turbine for normal operation and under stall conditions. From the patterns of the frequency spectra of the measuring signals a parameter for the detection of the approach to the stability line of a compressor is derived. A method for the on-line monitoring of the aerodynamic load is presented. Based on these results a monitoring system has been developed. First experiences with this system, applied to two multistage compressors, are reported.

1.
Adamczyk
J. J.
,
Celestina
M. L.
, and
Greitzer
E. M.
,
1993
, “
The Role of Tip Clearance in High-Speed Fan Stall
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
115
, pp.
28
39
.
2.
Day
I. J.
,
1993
, “
Stall Inception in Axial Flow Compressors
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
115
, pp.
1
9
.
3.
Gallus, H. E., Lambertz, J., and Wallmann, Th., 1979, “Blade-Row Interaction in an Axial-Flow Subsonic Compressor Stage,” ASME Paper No. 79-GT-92.
4.
Gallus, H. E., and Ho¨nen, H., 1986, “Experimental Investigations of Airfoil- and Endwall Boundary Layers in a Subsonic Compressor Stage,” ASME Paper No. 86-GT-143.
5.
Garnier
V. H.
,
Epstein
A. H.
, and
Greitzer
E. M.
,
1991
, “
Rotating Waves as a Stall Inception Indication in Axial Compressors
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
113
, pp.
290
302
.
6.
Inoue
M.
,
Kuroumaru
M.
,
Iwamoto
T.
, and
Ando
Y.
,
1991
, “
Detection of a Rotating Stall Precursor in Isolated Axial Flow Compressor Rotors
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
113
, pp.
281
289
.
7.
Paduano
J. D.
,
Epstein
A. H.
,
Valavani
L.
,
Longley
J. P.
,
Greitzer
E. M.
, and
Guenette
G. R.
,
1993
, “
Active Control of Rotating Stall in a Low-Speed Axial Compressor
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
115
, pp.
48
56
.
8.
Poensgen, Ch., 1991, “Experimentelle Untersuchung der Stro¨mung in einer Unterschall-Axialverdichterstufe bei hoher Drosselung und im Rotating Stall,” Dissertation, RWTH Aachen, Federal Republic of Germany.
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