Physical 1D Model of a High Pressure Ratio Centrifugal Compressor for Turbochargers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00320886" target="_blank" >RIV/68407700:21220/17:00320886 - isvavai.cz</a>

Result on the web

<a href="https://doaj.org/toc/1804-9338" target="_blank" >https://doaj.org/toc/1804-9338</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Physical 1D Model of a High Pressure Ratio Centrifugal Compressor for Turbochargers

Original language description

The physical model of a centrifugal compressor aims at finding detailed information on values inside the machine, based on standard compressor map knowledge and basic geometry of a compressor. The model describes aerodynamics of flow from compressor inlet to outlet at a central streamline, if mass flow rate and impeller speed is known. The solution of basic conservation laws can yield unknown, cross-section averaged temperatures, pressures and velocities along central streamline for compressible fluid and treats transonic operation, as well. After the description of general methods for solving compressible fluid flow and transformation of radial blade cascades to axial ones, the system of equations is completed with empiric knowledge of compressor blade cascades – forces and losses. Howell theory is used for axial inducer and after conform transformation to radial blade diffuser cascade, as well. Radial vanes of a rotor are transformed fixing the same length of a blade and flow areas and flow separation at inducer outlet is taken into account. Specific procedure is developed for a vaneless diffuser with friction losses. Non-linear equations of gas dynamics have to be solved in numerical and iterative way with help of Newton-Raphson solver. The model treats transonic flow features in both compressor inducer and diffuser. The validation of the model will be published in the second paper focused to this topics. The model can be used for quasi-steady simulation in a 1D model, especially if compressor map extrapolation is required. The model predictions create virtual sensors for identification of directly unmeasurable quantities inside a compressor. It helps in better understanding in-compressor processes. Moreover, the model offers parameters for unsteady model, based on 1D modules for unsteady flow modelling.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

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

2017

Confidentiality

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

Name of the periodical

MECCA Journal of Middle European Construction and Design of Cars

ISSN

1214-0821

e-ISSN

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Volume of the periodical

XV

Issue of the periodical within the volume

3

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

20

Pages from-to

1-20

UT code for WoS article

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EID of the result in the Scopus database

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