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Performance assessment limits in transonic 3D turbine stage blade rows using a mixing-plane approach

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Abstract

Numerical computation of gas turbine flowfields demands high computing power. In the present work, we present a detailed analysis of 3D computations for a highly loaded transonic blade and for a gas turbine stage. Comparison between experimental results and numerical computations reveals the precision limits of current modeling assumptions. Computations are performed using a time-marching approach coupled with a mixing-plane model for the exchange of flowfields between stator and rotor domains. Eddy viscosity turbulence models are applied to compute the flow with and without wall functions. Limitations in performance assessment are presented regarding the level of detail used for the geometry definition, the mixing-plane approach, and the near wall turbulence model employed.

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Authors and Affiliations

  1. Faculty of Engineering, University of Beira Interior, Covilhã, 6201-001, Portugal

    José C. Páscoa & Carlos Xisto

  2. Institute for Thermal Turbomachinery and Machine Dynamics, Graz University of Technology, Graz, Styria, A-8010, Austria

    Emil Göttlich

Authors
  1. José C. Páscoa
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  2. Carlos Xisto
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  3. Emil Göttlich
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Corresponding author

Correspondence to José C. Páscoa.

Additional information

This paper was recommended for publication in revised form by Associate Editor Do Hyung Lee

José Carlos Páscoa is currently an Assistant Professor at University of Beira Interior in Portugal. He conducts research at the nationally funded Center for Aerospace Sciences and Technology, where he also serves as the secretary of the center’s scientific council. His main research interests are numerical modeling of compressible flow, including turbomachinery and MHD flow in MPD thrusters. José Páscoa holds a doctorate degree on numerical analysis and design of turbomachinery cascades of blades. Since 1997, he has been involved in turbomachinery research and has participated in several research projects. In 2002, he was a visiting academic at Rolls-Royce UTC of Loughborough University in UK.

Carlos M. C. Xisto is currently a PhD student at the nationally funded Center for Aerospace Sciences and Technology. In 2009, he earned a Master in Engineering degree in Electromechanical Engineering with a dissertation on numerical modeling of gas turbine flow. He has also achieved the Licenciatura degree in Electromechanical Engineering in 2008.

Emil Göttlich is a post-doctoral research fellow at the Institute for Thermal Turbomachinery and Machine Dynamics, Graz (Austria). He holds a PhD on “Experimental Investigation of Cooling and Unsteady Flow in Transonic High-Temperature Turbine Stages.” Furthermore, he has a Master in Mechanical Engineering combined with Economics degree from Graz University of Technology, where he also graduated in Mechanical Engineering combined with Economics. His main research interest is on energy engineering.

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Páscoa, J.C., Xisto, C. & Göttlich, E. Performance assessment limits in transonic 3D turbine stage blade rows using a mixing-plane approach. J Mech Sci Technol 24, 2035–2042 (2010). https://doi.org/10.1007/s12206-010-0713-9

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  • DOI: https://doi.org/10.1007/s12206-010-0713-9

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