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Numerical Studies of the Passage Flowfield in a 3-D Transonic Turbine Blade Cascade

Published online by Cambridge University Press:  05 May 2011

Chang-Hsien Tai ,
Ding-San Wang ,
Ping-Hei Chen ,
Uzu-Kuei Hsu  and
Jr-Ming Miao
Chang-Hsien Tai*
Affiliation:
Vehicles Engineering Department, National Pingtung University of Science and Technology, Neipu Shiang 912, Pingtung, Taiwan, R.O.C.
Ding-San Wang*
Affiliation:
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
Ping-Hei Chen*
Affiliation:
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
Uzu-Kuei Hsu*
Affiliation:
Department of Aircraft and Turbine, Air Force Aeronautical and Technical School, Gangshan, Kaohsiung, Taiwan 820, R.O.C.
Jr-Ming Miao*
Affiliation:
Numerical Simulation Lab., Chung Cheng Institute of Technology, National Defense University, Dashi Jen, Taoyuan, Taiwan 335, R.O.C.
*
*Professor
***Candidate Ph.D.
*Professor
****Drillmaster
**Associate Professor
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Abstract

A three-dimensional Navior-Stokes analyzer based on control volume method is developed to simulate the complex flow field within a turbomachinery. With VKI-CT2 turbine blade as the test model, numerical results are compared with experimented data and shows the existence of separation-transition bubble and the interaction of shock with turbulent boundary layer flow. The governing Navier-Stokes equations are solved by an improved numerical method that uses an upwind flux-difference split scheme for spatial descretization and an explicit optimally smoothing multi-stage scheme for time integration. Turbulent stresses are approximated by modifying Baldwin-Lomax algebraic, k-ε, R-k-ε and RNG k-ε turbulence models. According to the results of this research, this analyzer can indeed effectively modulate and simulate the aerodynamic characteristic of the transonic turbine rotor near the endwall.

Keywords

Transonic rotorsSeparation bubbleVortexEndwallCFD
Type
Articles
Information
Journal of Mechanics , Volume 17 , Issue 4 , December 2001 , pp. 221 - 231
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2001

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References

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