A numerical procedure to predict the impeller–volute interaction in a single-stage centrifugal compressor is presented. The method couples a three-dimensional unsteady flow calculation in the impeller with a three-dimensional time-averaged flow calculation in the volute through an iterative updating of the boundary conditions on the interface of both calculation domains. The method has been used to calculate the flow in a compressor with an external volute at off-design operation. Computed circumferential variations of flow angles, total temperature, and pressure are shown and compared with measurements. The good agreement between the predictions and measurements confirms the validity of the approach.

1.
Ayder
E.
,
Van den Braembussche
R. A.
, and
Brasz
J. J.
,
1994
, “
Numerical analysis of the three-dimensional swirling flow in centrifugal compressor volutes
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
116
, pp.
462
468
.
2.
Badie
R.
,
Jonker
J. B.
, and
Van den Braembussche
R.
,
1994
, “
Finite element calculations and experimental verification of the unsteady potential flow in a centrifugal pump
,”
International Journal for Numerical Methods in Fluids
, Vol.
19
, No.
12
, pp.
1083
1102
.
3.
Chen, S. H., and Liaw, L.-F., 1997, “The flowfield calculations of a centrifugal pump with volute,” ASME Paper No. 97-GT-49.
4.
Croba, D., 1993, “Mode´lisation de l’e´coulement instationaire dans les pompes centrifuges, inte´raction roue-volute,” PhD. Thesis, Institut National Polytechnique de Grenoble, France.
5.
Dean
R.
, and
Senoo
Y.
,
1960
, “
Rotating wakes in vaneless diffusers
,”
ASME Journal of Basic Engineering
, Vol.
82
, No.
3
, pp.
563
570
.
6.
Fatsis
A.
,
Pierret
S.
, and
Van den Braembussche
R.
,
1997
, “
Three-dimensional unsteady flow and forces in centrifugal impellers with circumferential distortion of the outlet static pressure
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
119
, pp.
94
102
.
7.
Flathers, B., and Bache, G. E., 1996, “Aerodynamically induced radial forces in a centrifugal gas compressor: Part 2—Computational investigation,” ASME Paper No. 96-GT-352.
8.
Hagelstein, D., Van den Braembussche, R., Keiper, R., and Rautenberg, M., 1997, “Experimental investigation of the circumferential static pressure distortion in centrifugal compressor stages,” ASME Paper No. 97-GT-50.
9.
Miner
S. M.
,
Flack
R. D.
, and
Allaire
P. E.
,
1992
, “
Two-dimensional flow analysis of a laboratory centrifugal pump
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
114
, pp.
333
339
.
10.
Morfiadakis
E. E.
,
Voutsinas
S. G.
, and
Papantonis
D. E.
,
1991
, “
Unsteady flow calculation in a radial flow centrifugal pump with spiral casing
,”
International Journal for Numerical Methods in Fluids
, Vol.
12
, pp.
895
908
.
11.
Sideris, M., and Van den Braembussche, R. A., 1989, “Unsteady flow in centrifugal compressors due to downstream circumferential distortions,” ISABE Paper No. 89-7098.
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