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Numerical Analysis of the Behavior of Two-dimensional Separation Flow of a Turbine Last Stage Rotor Cascade at Large Negative Incidence

ZHU Guang-yu;YU Mao-zheng (Xi'an Jiaotong University,Institute of Thermal Turbomachinery,Xi'an China 710049)  
Finite volume approach and pressure-correct method are applied to numerically solve two-dimensional steady time-average N-S equations closed with κ-ε turbulence model and the separation flow in a turbine last stage rotor cascade at different negative incidence are simulated. The computational results are in agreement with experimental results. According to the obtained results, the behavior of the separation flow and the effects of negative incidences on the aerodynamic characteristics of cascade are analyzed.
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