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Modernization of the 16-stage axial compressor of the industrial gas turbine power unit for new operating conditions.

Number: 130

Author(s) : POPOV G., MIHEEV M., VOROBYEV A., FISHER E., ZUBANOV V., BATURIN O., GORIACHKIN E.

Summary

The paper describes the process of aerodynamic modernization of a 16-stage axial compressor of an industrial gas turbine unit. Tests of the baseline variant of the compressor re-vealed a significant drop of efficiency, pressure ratio, and stability margins. In addition, the ongoing work on the modernization of the entire engine sets the task to the authors of not just achieving design parameters but significantly exceeding them (air mass flow rate by 6%, pres-sure ratio by 2%, adiabatic efficiency by 1% relative to the design values).
To achieve these goals, a numerical model of the compressor was developed and validated. The characteristics obtained with its help were carefully analyzed. It was found that the front stage group has low efficiency, and the rear stage group is significantly overestimated in terms of mass flow rate.
Modernization was significantly hampered by the presence of many stages and many inde-pendent variables. For this reason, the problem was solved in several steps. A separate modern-ization of the first and rear groups of stages was performed. Moreover, methods of mathemati-cal optimization were used when developing the rear block of 10 stages. Then the working processes of the compressor parts were coordinated.
As a result of the research, a variant to modernize the existing 16-stage axial compressor was found, providing an increase in the air mass flow rate by 18%, adiabatic efficiency by 3.5% and margins of aerodynamic stability up to 16%.

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Pages: 16

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Details

  • Original title: Modernization of the 16-stage axial compressor of the industrial gas turbine power unit for new operating conditions.
  • Record ID : 30028994
  • Languages: English
  • Subject: Technology
  • Source: 12th International Conference on Compressors and their Systems
  • Publication date: 2021/09
  • Document available for consultation in the library of the IIR headquarters only.

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