The flow field in a high pressure ratio centrifugal compressor with a vaneless diffuser has been investigated numerically. The main goal is to assess the influence of various turbulence models suitable for internal flows with an adverse pressure gradient. The numerical analysis is performed with a 3D RANS in-house modified solver based on an object-oriented open-source library. According to previous studies from varying authors, the turbulence model is believed to be the key parameter for the discrepancy between experimental and numerical results, especially at high pressure ratios and high mass-flow. Particular care has been taken at the wall, where a detailed integration of the boundary layer has been applied. The results present different comparisons between the models and experimental data, showing the influence of using advanced turbulence models. This is done in order to capture the boundary layer behavior, especially in large adverse pressure gradient single stage machinery.

References

References
1.
Eisenlohr
,
G.
,
Krain
,
H.
,
Richter
,
F. A.
, and
Tiede
,
V.
, 2002, “
Investigations of the Flow Through a High Pressure Ratio Centrifugal Impeller
,” ASME Paper No. GT2002-30394.
2.
Casey
,
M. V.
,
Dalbert
,
P.
, and
Roth
,
P.
, 1990, “
The Use of 3D Viscous Flow Calculation in the Design and Analysis if Industrial Centrifugal Compressor
,” ASME Paper No. GT90-2.
3.
Hah
,
C.
, and
Krain
,
H.
, 1993, “
Secondary Flows and Vortex Motion in High Efficiency Backswept Impeller at the Design and Off-Design Conditions
,” ASME Paper No. GT93-37.
4.
Dickmann
,
H. P.
,
Wimmel
,
T. S.
,
Szwedowicz
,
J.
,
Filsinger
,
D.
, and
Roduner
,
C. H.
, 2005, “
Unsteady Flow in a Turbocharger Centrifugal Compressor - 3D-CFD-Simulation and Numerical and Experimental Analysis of Impeller Blade Vibration
,” ASME Paper No. GT2005-68235.
5.
Tamaki
,
H.
, 2010, “
Effect of Recirculation Device on Performance of High Pressure Ratio Centrifugal Compressor
,” ASME Paper No. GT2010-22570.
6.
Hunziker
,
R.
,
Dickmann
,
H. P.
, and
Emmrich
,
R.
, 2001, “
Numerical and Experimental Investigation of a Centrifugal Compressor With an Inducer Casing Bleed System
,”
Proc. Inst. Mech. Eng., Part A.
,
215
, pp.
783
791
.
7.
Krain
,
H.
,
Hoffmann
,
B.
, and
Pak
,
H.
, 1998, “
Aerodynamic of Centrifugal Compressor Impeller With Transonic Inlet Conditions
,” ASME Paper No. GT95-79.
8.
Krain
,
H.
, and
Hoffmann
,
B.
, 1998, “
Flow Physics in High Pressure Ratio Centrifugal Compressors
,” ASME Paper No. GT98-24.
9.
Hazby
,
R. H.
, and
Xu
,
L.
, 2009, “
Role of Tip Leakage in Stall of a Transonic Centrifugal Impeller
,” ASME Paper No. GT2009-59372.
10.
Mangani
,
L.
,
Bianchini
,
C.
,
Andreini
,
A.
, and
Facchini
,
B.
, 2007, “
Development and Validation of a C++ Object Oriented CFD Code for Heat Transfer Analysis
,” ASME Summer Heat Transfer Paper No. AJ-1266.
11.
OpenCFD
, 2006,
OpenFOAM User Guide
,
OpenCFD Limited
,
Winnerish, UK
.
12.
OpenCFD
, 2006,
OpenFOAM Programmers Guide
,
OpenCFD Limited
,
Winnerish, UK
.
13.
Shewchuk
,
J. R.
, 1994, “
An Introduction to the Conjugate Gradient Method Without the Agonizing Pain
,” School of Computer Science, Carnegie Mellon University, Pittsburgh, Tech. Report No. PA 15213.
14.
Mangani
,
L.
, 2008, “
Development and Validation of an Object Oriented CFD Solver for Heat Transfer and Combustion Modeling in Turbomachinery Application
,” Ph.D. thesis, Universitá degli Studi di Firenze, Dipartimento di Energetica, Florence, Italy.
15.
Di Carmine
,
E.
,
Facchini
,
B.
,
Mangani
,
L.
,
Abba
,
L.
,
Arcangeli
,
L.
, and
Traverso
,
S.
, 2007, “
Different Manufacturing Solution of Fan-Shaped Cooling Holes Part II: Numerical Analysis
,” IGTC 2007 Paper No. ABS-54.
16.
Di Carmine
,
E.
,
Facchini
,
B.
, and
Mangani
,
L.
, 2008, “
Investigation of Innovative Trailing Edge Cooling Configurations With Enlarged Pedestals and Square or Circular Ribs. Part II - Numerical Results
,” ASME Paper No. GT2008/51047.
17.
Mangani
,
L.
, and
Andreini
,
A.
, 2008, “
Application of an Object-Oriented CFD Code to Heat Transfer Analysis
,” ASME Paper No. GT2008-5118.
18.
Mangani
,
L.
,
Facchini
,
B.
, and
Bianchini
,
C.
, 2009, “
Conjugate Heat Transfer Analysis of an Internally Cooled Turbine Blades With an Object Oriented CFD Code
,” European Turbomachinery Congress Paper No. GT2010-23458.
19.
Mangani
,
L.
, and
Maritano
,
M.
, 2010, “
Conjugate Heat Transfer Analysis of NASA C3X Film Cooled Vane With an Object- Oriented CFD Code
,” ASME Paper No. GT2010-23458.
20.
Menter
,
F. R.
, 1993, “
Zonal Two Equation k - ω Turbulence Models for Aerodynamic Flows
,” AIAA Paper No. 93-2906.
21.
Kader
,
B. A.
, 1982, “
Temperature and Concentration Profiles in Fully Turbulent Boundary Layers
,”
Int. J. Heat Mass Transfer
,
24
(
2
), pp.
1541
1544
.
22.
Menter
,
F.
,
Esch
,
T.
,
Vieser
,
Wolfgang.
, 2003, “
Heat Transfer Predictions Based on Two-Equation Turbulence Models
,”
Proceedings of the ASME-JSME 2003 Thermal Engineering Joint Conference
, Mar. 16-20, 2003.
23.
Davidson
,
L.
, 2006, “
Turbulence Modeling
,” Chalmers University of Technology, Tech. Report No. MTF270.
24.
Durbin
,
P. A.
, 1996, “
On the k - ɛ Stagnation Point Anomaly
,”
Int. J. Heat Fluid Flow
,
17
(
1
), pp.
89
90
.
25.
Krain
,
H.
,
Hoffmann
,
B.
,
Eisenlohr
,
G.
,
Richter
,
F. A.
, and
Rohne
,
K. H.
, 2007, “
Improved High Pressure Ratio Centrifugal Compressor
,” ASME Paper No. GT2007-27100.
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