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

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 co...

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Veröffentlicht in:International journal of turbo & jet-engines Jg. 35; H. 1; S. 35 - 47
1. Verfasser: Dimitrakopoulos, Panagiotis
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Berlin De Gruyter 26.03.2018
Walter de Gruyter GmbH
Schlagworte:
02.60.Gf (Algorithms for Functional Approximation)
Calculation
Computing time
Efficiency
Electric power generation
Error analysis
Gas turbine engines
Impellers
Mathematical analysis
Power plants
Real gases
Suction
Thermodynamics
Turbocompressor
Turbocompressors
Working fluids
ISSN:0334-0082, 2191-0332
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Zusammenfassung: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.
Bibliographie:ObjectType-Article-1
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ISSN:0334-0082
2191-0332
DOI:10.1515/tjj-2016-0029