Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지
DOI QR코드

DOI QR Code

On the Significance of Turbulence Models and Unsteady Effect on the Flow Prediction through A High Pressure Turbine Cascade

  • El-Gendi, M.M. (School of Mechanical Engineering, University of Ulsan, Mechanical Power and Energy Department, Faculty of Engineering, Minia University) ;
  • Lee, Sang-Wook (School of Mechanical Engineering, University of Ulsan) ;
  • Son, Chang-Ho (School of Mechanical Engineering, University of Ulsan)
  • Received : 2011.11.15
  • Accepted : 2011.11.23
  • Published : 2011.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

Unsteady flow simulations through a transonic turbine vane were carried out for an isentropic Mach number of 1.02 and a Reynolds number of $10^6$. The main objective of the study is to investigate the effect of unsteadiness due to vortex shedding on the flow in transonic regime. The steady and the time-averaged unsteady results by employing three different turbulence models: shear stress transport (SST), k-${\omega}$, and ${\omega}$ Reynolds stress models were compared. The comparisons were emphasized on the isentropic Mach number along the blade and total pressure loss at the cascade exit. The results showed that both steady and unsteady calculations have good agreement with experimental data along the blade surface. However, at cascade exit, the unsteady calculations have much better agreement with experimental data than steady calculations. Based on these, we conclude that the unsteady flow calculations are essential for these types of problems.

Keywords

References

  1. Arts T., Rouvroit L. D. and Rutherford A. W., "Aerothermal investigation of a highly loaded transonic linear turbine guide vane", VKI Technical Note 174, 1990.
  2. Liu Y., "An efficient numerical method for highly loaded transonic cascade flow", Eng. Math, vol. 60, pp. 115-124, 2008. https://doi.org/10.1007/s10665-007-9150-x
  3. Gehrer A. and Jericha H., "External heat transfer predictions in a highly-loaded transonic linear turbine guide vane cascade using an upwind biased Navier-Stoke solver", In Seminar and Workshop on Turbomachinery Flow Prediction VI, 1998.
  4. Larsson J., "Turbine blade heat transfer calculations using two-equations turbulence models", J. of Power and Energy, vol. 211, pp. 153-262, 1997.
  5. Barth T. J. and Jespersen D. C., "The design and application of upwind schemes on unstructured meshes", AIAA paper 89-0366, 1989.
  6. Menter F. R., "Two-equation eddy viscosity turbulence models for engineering applications", ALAA Journal, vol. 32, P-8, pp. 1598-160, 1994.
  7. Wilcox D. C., "Turbulence modeling for CFD", DWC industries, INC, 2000.

Cited by

  1. A study on heat transfer and pressure drop characteristics of plain fin-tube heat exchanger using CFD analysis vol.38, pp.6, 2014, https://doi.org/10.5916/jkosme.2014.38.6.615
  2. Fatigue life and effect of sloshing according to the scale ratio of a prismatic LNG tank vol.35, pp.2, 2021, https://doi.org/10.1007/s12206-021-0109-z