Abstract
Flow fields at the rotor tip region in a low-speed axial-flow fan were experimentally and computationally investigated to clarify the flow mechanism behind a modal stall inception pattern. The behavior of tip leakage flow at the modal stall inception was different from that at the spike stall inception. The interface between the incoming flow, tip leakage flow, and end-wall backflow did not parallel to the rotor leading edge plane. Leading edge separation occurred when the tip leakage vortex broke down. This separation grew and formed three-dimensional separation vortex, which stood on the suction side near the leading edge. We concluded from these results that this three-dimensional separation vortex influenced on the initiation of the modal disturbance.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: The Proceedings of the Fluids engineering conference
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
