Physical Model of a Twin-scroll Turbine with Unsteady Flow

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00240035" target="_blank" >RIV/68407700:21220/15:00240035 - isvavai.cz</a>

Výsledek na webu

<a href="http://papers.sae.org/2015-01-1718" target="_blank" >http://papers.sae.org/2015-01-1718</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4271/2015-01-1718" target="_blank" >10.4271/2015-01-1718</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Physical Model of a Twin-scroll Turbine with Unsteady Flow

Popis výsledku v původním jazyce

The paper describes a way to a 1-D central streamline model of a radial turbine flow, suitable for twin-scroll description and based on approximation of real physics of flow mixing and energy transformation. The original 1-D model of a single scroll turbine, described earlier in numerous SAE papers, has been amended by twin-scroll nozzles (both vaneless or with blade cascades) and mixing of individual partitions of flows upstream of additional vaneless nozzle and an impeller. This model is transferable to 1-D unsteady simulations as it is (i.e., using quasi-steady approach) or using 1-D unsteady solvers. It has suitable features even for more detailed description of turbine flows and energy transformation. The first results of pulse influence on turbine maps delivered expected results consisting of complicated interaction between individual losses. The model itself is not fully predictive, using experimentally or in CFD found loss coefficients, but it is suitable for extrapolation of experience from similar systems before detailed CFD simulation or experiments are done. The new model can be used especially transferring turbine features found during mapping back to the design stage at a turbocharger manufacturer. The features of twin scroll turbines call for appropriate optimization of turbines for high pulsation factor, as they are currently used for twin-scroll four cylinder engine turbochargers (two cylinders with 360° distance between pulses). The results of turbine matching should be used as a feed-back for turbine design.

Název v anglickém jazyce

Physical Model of a Twin-scroll Turbine with Unsteady Flow

Popis výsledku anglicky

The paper describes a way to a 1-D central streamline model of a radial turbine flow, suitable for twin-scroll description and based on approximation of real physics of flow mixing and energy transformation. The original 1-D model of a single scroll turbine, described earlier in numerous SAE papers, has been amended by twin-scroll nozzles (both vaneless or with blade cascades) and mixing of individual partitions of flows upstream of additional vaneless nozzle and an impeller. This model is transferable to 1-D unsteady simulations as it is (i.e., using quasi-steady approach) or using 1-D unsteady solvers. It has suitable features even for more detailed description of turbine flows and energy transformation. The first results of pulse influence on turbine maps delivered expected results consisting of complicated interaction between individual losses. The model itself is not fully predictive, using experimentally or in CFD found loss coefficients, but it is suitable for extrapolation of experience from similar systems before detailed CFD simulation or experiments are done. The new model can be used especially transferring turbine features found during mapping back to the design stage at a turbocharger manufacturer. The features of twin scroll turbines call for appropriate optimization of turbines for high pulsation factor, as they are currently used for twin-scroll four cylinder engine turbochargers (two cylinders with 360° distance between pulses). The results of turbine matching should be used as a feed-back for turbine design.

Druh

D - Stať ve sborníku

CEP obor

JT - Pohon, motory a paliva

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020020" target="_blank" >TE01020020: Centrum kompetence automobilového průmyslu Josefa Božka</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Název statě ve sborníku

SAE Technical Paper 2015-01-1718

ISBN

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ISSN

0148-7191

e-ISSN

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Počet stran výsledku

14

Strana od-do

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Název nakladatele

SAE International

Místo vydání

Warrendale, PA 15096

Místo konání akce

Detroit

Datum konání akce

21. 4. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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