A numerical concept study on internal blade cooling in axial compressors

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Authors

  • T. Willeke
  • M. Hellberg
  • J. R. Seume
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Details

Original languageEnglish
Title of host publication12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017
Number of pages13
Publication statusPublished - 2017
Event12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017 - Stockholm, Sweden
Duration: 3 Apr 20177 Apr 2017

Abstract

The stator blades of a three-stage axial compressor were equipped with internal cooling channels to investigate the effects of internal blade cooling on axial compressor performance and gas-turbine efficiency. For water-cooled stator blades under realistic boundary conditions, the results from numerical simulations predict an isentropic total-to-total stage efficiency increase by 1.26 percentage points with no effect on the stage pressure ratio. In terms of overall efficiency, a multi-stage axial compressor profits from internal stator-blade cooling by a 1.45% increase. Increasing the heat exchanging surface through a higher stator solidity, this cooling benefit surpasses higher blade losses, and can be further maximized for high solidity stators. Gas-turbine efficiency, with or without recuperation is predicted to be directly proportional to the improvements in compressor efficiency.

Keywords

    Coolant, Efficiency, Heat, Stage, Stator

ASJC Scopus subject areas

Cite this

A numerical concept study on internal blade cooling in axial compressors. / Willeke, T.; Hellberg, M.; Seume, J. R.
12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017. 2017.

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Willeke, T, Hellberg, M & Seume, JR 2017, A numerical concept study on internal blade cooling in axial compressors. in 12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017. 12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017, Stockholm, Sweden, 3 Apr 2017. https://doi.org/10.29008/etc2017-106
Willeke, T., Hellberg, M., & Seume, J. R. (2017). A numerical concept study on internal blade cooling in axial compressors. In 12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017 https://doi.org/10.29008/etc2017-106
Willeke T, Hellberg M, Seume JR. A numerical concept study on internal blade cooling in axial compressors. In 12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017. 2017 doi: 10.29008/etc2017-106
Willeke, T. ; Hellberg, M. ; Seume, J. R. / A numerical concept study on internal blade cooling in axial compressors. 12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017. 2017.
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AB - The stator blades of a three-stage axial compressor were equipped with internal cooling channels to investigate the effects of internal blade cooling on axial compressor performance and gas-turbine efficiency. For water-cooled stator blades under realistic boundary conditions, the results from numerical simulations predict an isentropic total-to-total stage efficiency increase by 1.26 percentage points with no effect on the stage pressure ratio. In terms of overall efficiency, a multi-stage axial compressor profits from internal stator-blade cooling by a 1.45% increase. Increasing the heat exchanging surface through a higher stator solidity, this cooling benefit surpasses higher blade losses, and can be further maximized for high solidity stators. Gas-turbine efficiency, with or without recuperation is predicted to be directly proportional to the improvements in compressor efficiency.

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KW - Heat

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