Abstract
Flow visualization based on unsteady velocity information is utilized to understand directly and physically the flow structure. In this problem, the phase-average method is widely used which adjusts the fluctuating velocities in order to express them simultaneously. Prior to this, each of the velocities has been measured at their measuring points with hot-wire anemometry or laser Doppler velocimetry (LDV). However, the method has the disadvantage that velocities other than the fluctuating velocities that are being sought produce wave distortions such as FM-AM modulations. We propose a new method which uses 2 LDVs and the FFT analysis which determines the frequency, amplitude and phase of each fluctuating velocity. This method clarifies the time histories of the velocity, vorticity and velocity-energy distributions around a pitching aerofoil either with nonseparation or separation.
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: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
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.
