What is it about?
This work proposes an active feedback control strategy using cross-correlation technique in a single stage axial flow fan operating under dynamic inflow distortion. Experiments were carried out under dynamic inflow distortion at the design speed with only three sensors and actuators, each. It was observed that stall inception under co- (in the same direction of rotor rotation) and counter-rotating (in the opposite direction of rotor rotation) inflow distortion occurred through long and short length-scale disturbances, respectively.
Featured Image
Why is it important?
Very limited studies have been carried out on the active stabilization of fan/compressor stall under dynamic inflow distortion. The present work not only demonstrates the active stabilization of an axial fan using tip injection, but also unravels the stall inception mechanism under dynamic inflow distortion during design speed operation. Besides this, it also attempts to achieve stabilization of the fan for a longer duration using limited number of sensors and actuators.
Perspectives
Significant delay in stall inception using only three sensors and three actuators was achieved. Total injected mass flow of only about 0.05% of the primary mass flow resulted in a significant stall inception delay of 125 rotor revolutions (~3.125 s) and 65 rotor revolutions (~1.625 s) under co- and counter-rotating inflow distortions, respectively.
Dr Pramod Salunkhe
Manipal University
Read the Original
This page is a summary of: Active feedback control of stall in an axial flow fan under dynamic inflow distortion, Experimental Thermal and Fluid Science, September 2011, Elsevier,
DOI: 10.1016/j.expthermflusci.2011.03.008.
You can read the full text:
Contributors
The following have contributed to this page
