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Zero D and 3D analysis of the centrifugal compressor of a gas turbine and its evaluation using experimental results

Karrabi, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1115/IMECE2011-65883
  3. Abstract:
  4. In compressor design, it is necessary to simulate the compressor before manufacturing and performing experimental studies. One of the most efficient and common modeling methods is zero D analysis using scaling method with constant coefficients. Although it is efficient in the vicinity of the design point, its results are not acceptable in the off design points due to the growing error by getting away from design points. In this research, a novel zero D analysis method is developed predict accurately the compressor performance not only in the design point but also in the off design pint. In this method, variable coefficients are used instead of constant coefficients, which are obtained based on the test results of several compressors. In this paper, the performance characteristics of a gas turbine centrifugal compressor including a radial impeller, a radial diffuser and deswirl vanes are predicted using the zero D approach. Moreover, the 3-D flow field inside the compressor is analyzed using a full 3-D Navier-Stokes code with SST turbulent model. In order to validate the zero D and 3-D analysis results, the existing compressor is investigated experimentally on the operation line of the gas turbine by some experiments in which the flow parameters at the compressor inlet and outlet are measured. Finally, the performance results obtained from 3-Dand zero D analysis are compared with the experimental results which show good agreement
  5. Keywords:
  6. 3D analysis ; Analysis method ; Compressor designs ; Compressor inlet ; Compressor performance ; Constant coefficients ; Design points ; Experimental studies ; Flow parameters ; ITS evaluation ; Navier-Stokes code ; Off-design points ; Performance characteristics ; Radial diffuser ; Radial impeller ; Scaling method ; Turbulent models ; Variable coefficients ; Centrifugal compressors ; Copyrights ; Exhibitions ; Gas turbines ; Inlet flow ; Mechanical engineering ; Design
  7. Source: ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, 11 November 2011 through 17 November 2011 ; Volume 1 , November , 2011 , Pages 897-906 ; 9780791854877 (ISBN)
  8. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1642265