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International Journal of Turbo & Jet-Engines

Editor-in-Chief: Gal-Or, Benjamin

Ed. by Sherbaum, Valery / Erenburg, Vladimir

4 Issues per year

IMPACT FACTOR 2017: 0.425

CiteScore 2017: 0.52

SCImago Journal Rank (SJR) 2017: 0.175
Source Normalized Impact per Paper (SNIP) 2017: 0.567

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Volume 35, Issue 1


A Generalized Method for the Comparable and Rigorous Calculation of the Polytropic Efficiencies of Turbocompressors

Panagiotis Dimitrakopoulos
Published Online: 2018-02-15 | DOI: https://doi.org/10.1515/tjj-2016-0029


The calculation of polytropic efficiencies is a very important task, especially during the development of new compression units, like compressor impellers, stages and stage groups. Such calculations are also crucial for the determination of the performance of a whole compressor. As processors and computational capacities have substantially been improved in the last years, the need for a new, rigorous, robust, accurate and at the same time standardized method merged, regarding the computation of the polytropic efficiencies, especially based on thermodynamics of real gases. The proposed method is based on the rigorous definition of the polytropic efficiency. The input consists of pressure and temperature values at the end points of the compression path (suction and discharge), for a given working fluid. The average relative error for the studied cases was 0.536 %. Thus, this high-accuracy method is proposed for efficiency calculations related with turbocompressors and their compression units, especially when they are operating at high power levels, for example in jet engines and high-power plants.

Keywords: Calculation; Efficiency; Performance; Thermodynamics; Turbocompressor

PACS: 02.60.Gf (Algorithms for Functional Approximation)


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About the article

Received: 2016-04-21

Accepted: 2016-05-18

Published Online: 2018-02-15

Published in Print: 2018-03-26

Citation Information: International Journal of Turbo & Jet-Engines, Volume 35, Issue 1, Pages 35–47, ISSN (Online) 2191-0332, ISSN (Print) 0334-0082, DOI: https://doi.org/10.1515/tjj-2016-0029.

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