Pengfei Ju1,2, Fangfei Ning3,4,*, Zhiting Tong1,2, Jingying Wang5,6
FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.3, pp. 761-773, 2022, DOI:10.32604/fdmp.2022.018841
Abstract In this paper, a numerical investigation into a spike-type rotating stall process is carried out considering a transonic compressor rotor (the NASA Rotor 37). Through solution of the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations, the evolution process from an initially circumferentially-symmetric near-stall flow field to a stable stall condition is simulated without adding any artificial disturbance. At the near-stall operating point, periodic fluctuations are present in the overall flow of the rotor. Moreover, the blockage region in the channel periodically shifts from middle span to the tip. This fluctuating condition does not directly lead to stall, while the full-annulus calculation eventually… More >
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