Basic Issues with High-Efficiency Turbochargers with Radial Turbines for Diesel Engines

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00308079" target="_blank" >RIV/68407700:21220/16:00308079 - isvavai.cz</a>

Result on the web

<a href="http://www.lalibreria.upv.es" target="_blank" >http://www.lalibreria.upv.es</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Basic Issues with High-Efficiency Turbochargers with Radial Turbines for Diesel Engines

Original language description

The impact of turbocharger efficiency and the layout of air loop on engine cycle optimization at extremely downsized, two-stage turbocharged diesel engines is explained in the paper, aiming at the highest engine efficiency. Optimization was done locally along WOT speed curve, using mostly unconstrained input parameters and assuming full flexibility of engine and turbocharger design. This task puts contradictory demands on air loop features and boost pressure control. High boost level re-quires optimized two-stage turbocharging, which moves the optimum boost pressure to a level suitable for efficient combustion. The highest achievable isentropic efficiency of turbochargers and aerodynam-ic design matched to required performance is of utmost importance. Pressure wave impact on turbine performance, simulated by 1-D tools, can be estimated using developed regression models of correc-tion coefficients. Optimized engine cycle parameters can be fulfilled if preliminary turbine design is per-formed for low and rated speed variable geometry control. An important tool for adjacent optimization is physical modelling of a turbine instead of using turbine maps. It makes determination of the best turbine dimensions possible for the task intended. The individual efficiencies of both turbochargers can reach up to 55% if a compromise in impeller geometry is applied.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JT - Propulsion, engines and fuels

OECD FORD branch

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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

2016

Confidentiality

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

Article name in the collection

THIESEL 2016

ISBN

978-84-9048-535-4

ISSN

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e-ISSN

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Number of pages

14

Pages from-to

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Publisher name

Universidad Politécnica de Valencia

Place of publication

Valencia

Event location

Valencia

Event date

Sep 13, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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