Progress in Performance Modelling of ICE Turbomachinery – Application of Predictive CFD Models

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00356636" target="_blank" >RIV/68407700:21220/21:00356636 - isvavai.cz</a>

Výsledek na webu

<a href="http://fs12120.fsid.cvut.cz/softlib/2021/FISITA2021_turbo.zip" target="_blank" >http://fs12120.fsid.cvut.cz/softlib/2021/FISITA2021_turbo.zip</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Progress in Performance Modelling of ICE Turbomachinery – Application of Predictive CFD Models

Popis výsledku v původním jazyce

The paper deals with modelling of turbomachinery performance while using advanced CFD methods based on either 3-D CFD or 1-D CFD. The focus is put on the turbine (radial one, which is typically applied in automotive turbochargers), however, the topic of compressors is also considered. Different turbomachinery was available for both experiments and simulations. This concerns the classical fixed geometry radial turbine, variable geometry turbine (VGT) and twin-scroll turbine. Regarding the compressors, a classical automotive one was available. The presented work was supported by different turbomachinery manufacturers, hence all necessary data were available to create detailed 3-D CFD models of the above-mentioned turbomachinery. Some of them were also converted into 1-D CFD models as well. The proposed paper concerns mainly the modelling part of the work, hence the experimental data are used as reference ones. All 3-D turbomachinery models were calculated using CFD SW tool AVL FIRE and the results were compared with reference data. Sensitivity studies of selected parameters were carried out (e.g., mesh parameters, turbulence models) – this also includes different calculation set-ups in terms of rotor modelling (fully movable rotor, frozen rotor approach). Regarding 1-D CFD turbomachinery models, they need a lot of calibration using either experimental data or 3-D CFD ones to match mass-flow/efficiency performance. However, they are much faster than 3-D CFD ones, hence they can be applied in 0-D/1-D CFD codes (e.g., GT-Power) to run the complete engine model simulations. As they are based on 1-D CFD, they are much more predictive than standard models based on steady-state maps. This brings significant improvement in calculation accuracy under transient operating conditions or for unconventional turbomachinery design(s) (e.g., twin-scroll turbine).

Název v anglickém jazyce

Progress in Performance Modelling of ICE Turbomachinery – Application of Predictive CFD Models

Popis výsledku anglicky

The paper deals with modelling of turbomachinery performance while using advanced CFD methods based on either 3-D CFD or 1-D CFD. The focus is put on the turbine (radial one, which is typically applied in automotive turbochargers), however, the topic of compressors is also considered. Different turbomachinery was available for both experiments and simulations. This concerns the classical fixed geometry radial turbine, variable geometry turbine (VGT) and twin-scroll turbine. Regarding the compressors, a classical automotive one was available. The presented work was supported by different turbomachinery manufacturers, hence all necessary data were available to create detailed 3-D CFD models of the above-mentioned turbomachinery. Some of them were also converted into 1-D CFD models as well. The proposed paper concerns mainly the modelling part of the work, hence the experimental data are used as reference ones. All 3-D turbomachinery models were calculated using CFD SW tool AVL FIRE and the results were compared with reference data. Sensitivity studies of selected parameters were carried out (e.g., mesh parameters, turbulence models) – this also includes different calculation set-ups in terms of rotor modelling (fully movable rotor, frozen rotor approach). Regarding 1-D CFD turbomachinery models, they need a lot of calibration using either experimental data or 3-D CFD ones to match mass-flow/efficiency performance. However, they are much faster than 3-D CFD ones, hence they can be applied in 0-D/1-D CFD codes (e.g., GT-Power) to run the complete engine model simulations. As they are based on 1-D CFD, they are much more predictive than standard models based on steady-state maps. This brings significant improvement in calculation accuracy under transient operating conditions or for unconventional turbomachinery design(s) (e.g., twin-scroll turbine).

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the FISITA 2021 World Congress

ISBN

978-1-9160259-2-9

ISSN

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e-ISSN

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Počet stran výsledku

13

Strana od-do

1-13

Název nakladatele

FISITA - International Federation of Automotive Engineering Societies

Místo vydání

London

Místo konání akce

Praha

Datum konání akce

14. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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