Abstract
Transitional characteristics of a plane jet excited by wake of a two-dimensional cylinder installed in nozzle contraction has been investigated by FFT and phase-averaging techniques. The slot width h of the nozzle was fixed to 15mm. The diameter of the cylinder d was 2mm, and the location of the cylinder inside the nozzle contraction Xc was 90 mm from the nozzle exit. The exit velocity was 10.1m/s, and Reynolds number based on the slot width was 1.0×104. In this setup condition of the cylinder, two distinctive spectral peaks (f1 and f2) centered at 1/2 the excitation frequency were observed. And also inharmonic phenomenon indicated by presence of beat frequency of the two frequencies was observed. The results show that the jet under inharmonic excitation exhibits flapping motion at frequency f1-f2, and the jet starts to rolling-up to form vortex street at x/h>8.
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.
