The impact of boundary layer aspiration, or suction, on the aerodynamic design and performance of turbomachinery airfoils is discussed in this paper. Aspiration is studied first in the context of a controlled diffusion cascade, where the effect of discrete aspiration on loading levels and profile loss is computationally investigated. Blade design features which are essential in achieving high loading and minimizing the aspiration requirement are described. Design studies of two aspirated compressor stages and an aspirated turbine exit guide vane using three dimensional Navier-Stokes calculations are presented. The calculations show that high loading can be achieved over most of the blade span with a relatively small amount of aspiration. Three dimensional effects close to the endwalls are shown to degrade the performance to varying degrees depending on the loading level.
Aerodynamic Design and Performance of Aspirated Airfoils
Contributed by the International Gas Turbine Institute and presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002. Manuscript received by the IGTI, October 11, 2001. Paper No. 2002-GT-30369. Review Chair: E. Benvenuti.
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Merchant, A. (January 23, 2003). "Aerodynamic Design and Performance of Aspirated Airfoils ." ASME. J. Turbomach. January 2003; 125(1): 141–148. https://doi.org/10.1115/1.1519834
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