Utilization of a Twin Scroll Radial Centripetal

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00340495" target="_blank" >RIV/68407700:21220/19:00340495 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.4271/2019-01-0191" target="_blank" >https://doi.org/10.4271/2019-01-0191</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4271/2019-01-0191" target="_blank" >10.4271/2019-01-0191</a>

Result language

angličtina

Original language name

Utilization of a Twin Scroll Radial Centripetal

Original language description

The article describes the utilization of the map-less approach in simulation of single and twin scroll radial turbines. The conventional steady flow maps are not used. An unsteady 1-D model of a twin scroll turbine includes scrolls, mixing of flows upstream of the impeller, turbine wheel, leakages and outlet pipe. Developed physical turbine model was calibrated with data from experiments at specific steady flow turbocharger test bed with open loop, which enables to achieve arbitrary level of an impeller admission via throttling in separate sections. A selected twin scroll turbine was tested under full, partial flow admission of an impeller and extreme partial admission with closed section. The required number of operating points is relatively low compared with conventional steady flow maps, when the maps have to be generated for each level of an impeller admission. The calibration process of the full 1-D turbine model is described. The fully calibrated 1-D twin scroll turbine model, in conjunction with an internal combustion engine model, is able to describe processes inside a turbocharger turbine under highly pulsating flow. The experiments were also performed on a turbocharged six cylinder diesel engine with twin scroll turbine. The engine was tested at steady and transient loads, and various speeds operation. The model of the internal combustion engine with the full 1-D model of the twin scroll turbine was properly calibrated by experimental data. The 3-D CFD model of the tested turbine is also introduced. The results of unsteady flow simulation, based on the in-house 3-D CFD finite volume solver, are compared with the 1-D simulation and also experiments. The results of steady and unsteady operation of the turbine and future utilization of developed simulation tools are discussed.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2019

Confidentiality

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

Article name in the collection

WCX SAE World Congress Experience

ISBN

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ISSN

0148-7191

e-ISSN

0148-7191

Number of pages

13

Pages from-to

1-13

Publisher name

SAE International

Place of publication

Warrendale, PA

Event location

Detroit

Event date

Apr 9, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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