2006
Marconcini, Michele; Rubechini, Filippo; Arnone, Andrea; Ibaraki, Seiichi
Numerical Investigation of a Transonic Centrifugal Compressor Proceedings
ASME, Barcelona, Spain, May 8–11, 2006, vol. 6: Turbomachinery, Parts A and B, 2006, ISBN: 0-7918-4241-X.
@proceedings{957,
title = {Numerical Investigation of a Transonic Centrifugal Compressor},
author = {Michele Marconcini and Filippo Rubechini and Andrea Arnone and Seiichi Ibaraki},
url = {http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1587685&resultClick=1},
doi = {dx.doi.org/10.1115/GT2006-90098},
isbn = {0-7918-4241-X},
year = {2006},
date = {2006-05-01},
journal = {ASME Turbo Expo 2006: Power for Land, Sea, and Air},
volume = {6: Turbomachinery, Parts A and B},
pages = {1005-1012},
publisher = {ASME},
address = {Barcelona, Spain, May 8–11, 2006},
abstract = {A three-dimensional Navier-Stokes solver is used to investigate the flow field of a high pressure ratio centrifugal compressor for turbocharger applications. Such a compressor consists of a double-splitter impeller followed by a vane diffuser. The inlet flow to the open shrouded impeller is transonic, thus giving rise to interactions between shock waves and boundary layers and between shock waves and tip leakage vortices. These interactions generate complex flow structures which are convected and distorted through the impeller blades. Detailed Laser Doppler Velocimetry (LDV) flow measurements are available at various cross sections inside the impeller blades highlighting the presence of low velocity flow regions near the shroud. Particular attention is focused on understanding the physical mechanisms which govern the flow phenomena in the near shroud region. To this end numerical investigations are performed using different tip clearance modelizations and various turbulence models, and their impact on the computed flow field is discussed.},
keywords = {},
pubstate = {published},
tppubtype = {proceedings}
}
A three-dimensional Navier-Stokes solver is used to investigate the flow field of a high pressure ratio centrifugal compressor for turbocharger applications. Such a compressor consists of a double-splitter impeller followed by a vane diffuser. The inlet flow to the open shrouded impeller is transonic, thus giving rise to interactions between shock waves and boundary layers and between shock waves and tip leakage vortices. These interactions generate complex flow structures which are convected and distorted through the impeller blades. Detailed Laser Doppler Velocimetry (LDV) flow measurements are available at various cross sections inside the impeller blades highlighting the presence of low velocity flow regions near the shroud. Particular attention is focused on understanding the physical mechanisms which govern the flow phenomena in the near shroud region. To this end numerical investigations are performed using different tip clearance modelizations and various turbulence models, and their impact on the computed flow field is discussed.
2004
Boncinelli, P; Rubechini, Filippo; Arnone, Andrea; Cecconi, M; Cortese, C
Real Gas Effects in Turbomachinery Flows: a CFD Model for Fast Computations Journal Article
In: ASME Journal of Turbomachinery, vol. 126, no. 2, pp. 268–276, 2004, ISSN: 0889-504X.
@article{BRACC04,
title = {Real Gas Effects in Turbomachinery Flows: a CFD Model for Fast Computations},
author = {P Boncinelli and Filippo Rubechini and Andrea Arnone and M Cecconi and C Cortese},
url = {http://link.aip.org/link/?JTM/126/268/1},
doi = {10.1115/1.1738121},
issn = {0889-504X},
year = {2004},
date = {2004-01-01},
journal = {ASME Journal of Turbomachinery},
volume = {126},
number = {2},
pages = {268–276},
abstract = {A numerical model was included in a three-dimensional viscous solver to account for real gas effects in the compressible Reynolds averaged Navier-Stokes (RANS) equations. The behavior of real gases is reproduced by using gas property tables. The method consists of a local fitting of gas data to provide the thermodynamic property required by the solver in each solution step. This approach presents several characteristics which make it attractive as a design tool for industrial applications. First of all, the implementation of the method in the solver is simple and straightforward, since it does not require relevant changes in the solver structure. Moreover, it is based on a low-computational-cost algorithm, which prevents a considerable increase in the overall computational time. Finally, the approach is completely general, since it allows one to handle any type of gas, gas mixture or steam over a wide operative range. In this work a detailed description of the model is provided. In addition, some examples are presented in which the model is applied to the thermo-fluid-dynamic analysis of industrial turbomachines.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A numerical model was included in a three-dimensional viscous solver to account for real gas effects in the compressible Reynolds averaged Navier-Stokes (RANS) equations. The behavior of real gases is reproduced by using gas property tables. The method consists of a local fitting of gas data to provide the thermodynamic property required by the solver in each solution step. This approach presents several characteristics which make it attractive as a design tool for industrial applications. First of all, the implementation of the method in the solver is simple and straightforward, since it does not require relevant changes in the solver structure. Moreover, it is based on a low-computational-cost algorithm, which prevents a considerable increase in the overall computational time. Finally, the approach is completely general, since it allows one to handle any type of gas, gas mixture or steam over a wide operative range. In this work a detailed description of the model is provided. In addition, some examples are presented in which the model is applied to the thermo-fluid-dynamic analysis of industrial turbomachines.