Multidisciplinary Coupling Simulation of Low Pressure Turbine in Working Profile
Simulation of a two stages low-pressure turbine component using computational fluid dynamics and two multidisciplinary coupled solutions within a typical operating profile of the turbine.Comparison of differences between turbine aerodynamic thermodynamic parameters predicted by different solution methods.Analysis of the deformation rules of the local geometry and the effect of local deformation on the flow field within the working profile.The results show:Multidisciplinary coupling effect on the low blade position load distribution to produce a certain impact,the specific influence law and different working conditions are closely related.The multidisciplinary coupled solution approach that considers heat transfer and deformation in the solid domain predicts higher values of turbine efficiency.As the turbine power increases,changes in the interstage flange intervals and sealing grate tooth clearances result in more sealing cold gas collecting in the front chamber,affecting the flow structure in the disc chamber,weakening the gas intrusion phenomenon,and achieving better cooling and sealing effects in the disc chamber.
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