This paper summarizes the main results sorted out from a design of experiment (DoE) based on a validated computational fluid dynamics (CFD). Several tip recessed geometries applied to an unshrouded impeller were considered in conjunction with two tip clearance levels. The computations show that recessed tip geometries have positive effects when considering high-flow coefficient values, while in part-load conditions the gain is reduced. Starting from the results obtained when studying tip cavities, a single rim tip squealer geometry was then analyzed: the proposed geometry leads to performance improvements for all the tested conditions considered in this work.
Effects of Impeller Squealer Tip on Centrifugal Compressor Performance
Contributed by the Turbomachinery Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 28, 2016; final manuscript received July 29, 2016; published online October 11, 2016. Editor: David Wisler.
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Da Soghe, R., Bianchini, C., Tommaso Rubino, D., and Toni, L. (October 11, 2016). "Effects of Impeller Squealer Tip on Centrifugal Compressor Performance." ASME. J. Eng. Gas Turbines Power. March 2017; 139(3): 032603. https://doi.org/10.1115/1.4034541
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