Combined Effects of Controlled Vortex Design and Forward Blade Skew on the Three-Dimensional Flow in Axial Flow Rotors

János, Vad [Vad, János (Áramlástan), szerző] Áramlástan Tanszék (BME / GPK); Ali, R A Kwedikha; Csaba, Horváth [Horváth, Csaba (Áramlástan), szerző] Áramlástan Tanszék (BME / GPK)

Angol nyelvű Tudományos Konferenciaközlemény (Könyvrészlet)
    Comparative studies have been carried out on two axial flow fan rotors at their design flow rate in order to investigate the combined effects of controlled vortex design and circumferential forward skew on blade aerodynamics. The studies were based on Computational Fluid Dynamics, with composition and application of structured hexahedral grids taking up the challenge of the relatively complicated blade geometries due to skew and sweep. The computations indicated that the forward-skewed blade tip modifies the inlet flow field, leading to the rearrangement of spanwise blade load distribution, increase of losses along the dominant part of span, and converting the original non-free vortex spanwise blade circulation distribution toward a free-vortex flow pattern. The radial outward flow on the suction side, being especially significant for non-free vortex rotors, was found to be effectively moderated by forward skew, together with the losses associated. It has been concluded that forward skew is especially recommended for non-free vortex rotors for retardation of tip stalling.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2021-04-22 15:45