ADEL GHENAIET
Laboratory of Energetics and Conversion Systems, Faculty of Mechanical Engineering, University of Sciences and Technology, Houari Boumediene, BP 32 El-alia, Bab-ezzouar, 16111, Algiers, Algeria
Corresponding Author:[email protected]
Author ProfileAbstract
The main goal of this study is to determine the aerodynamic performance
and to characterize unsteady flows in a high-speed high-reaction
pre-whirl axial flow fan. The pressure waves’ main diametrical modes
where two blades interact with two vanes and their sequences are
predicted. There are mainly two mechanisms of IGV-rotor interactions
identified; the first is attributed to the potential effect whereas the
second is due to the wake-blade interaction and the advection of wake
mixing into the blades’ passages. Both effects are dependent on the
circumferential positions of blades and the axial inter-distance between
IGV and rotor. The time mode analyses of pressure fluctuations recorded
from different monitor points are determined and the frequencies of
prevailing modes and those related to the vortical flow structure
through the components are also identified. The understanding of vanes
and blade rows interactions at various axial inter-distances is an
important step in determining the beneficial and detrimental effects on
the design of high performance axial fan stage.