TY  - EJOU
AU  - Wang, Yongsheng 
AU  - Lu, Xiangwu 
AU  - Yuan, Wei 
AU  - Zhang, Lei 

TI  - Numerical Analysis of Rotor Blade Angle Influence on Stall Onset in an Axial Fan
T2  - Fluid Dynamics \& Materials Processing

PY  - 2025
VL  - 21
IS  - 6
SN  - 1555-2578

AB  - This study explores the influence of rotor blade angle on stall inception in an axial fan by means of numerical simulations grounded in the Reynolds-Averaged Navier-Stokes (RANS) equations and the Realizable <i>k</i>-ε turbulence model. By analyzing the temporal behavior of the outlet static pressure, along with the propagation velocity of stall inception, the research identifies distinct patterns in the development of stall. The results reveal that stall inception originates in the second rotor impeller. At a blade angle of 27°, the stall inception follows a modal wave pattern, while in all other cases, it assumes the form of spike-type stall. The flow field associated with spike stall inception demonstrates a relatively uniform gradient in the radial direction, whereas the modal wave stall case displays a distinctive “L”-shaped propagation feature. At blade angles of −9° and −18°, multiple stall inceptions are observed. These phenomena initiate at the blade’s leading edge, propagate along both axial and radial directions, and transition dynamically between single and multiple inception states.
KW  - Rotor blade angle; spike stall inception; modal wave stall inception; numerical simulation; axial fan

DO  - 10.32604/fdmp.2025.061052