Wavelength measurement of a liquid jet based on spectral analysis of image intensity
2015 (English)In: Advances in Mechanical Engineering, ISSN 1687-8132, E-ISSN 1687-8140, Vol. 7, no 8, 1687814015595165Article in journal (Refereed) Published
The instability analysis of the liquid jet issuing into ambient gas was conducted with the emphasis placed upon the evolution of surface wave on the jet surface. First, an experimental method was developed to visualize the microscopic surface wave on the liquid jet. Camera setting parameters significantly affecting the detection of desired jet features were discussed. Second, a spectral method was applied to process the obtained jet images. The accuracy of this method was validated in several ways. The results show that wavelengths increase monotonically along the streamwise direction and decrease with the increase in Reynolds number which corresponds to the boundary layer momentum thickness at nozzle exit. Various patterns of wave structures on jet surface are revealed. In this article, the pattern transforms from three-dimensional to two-dimensional at Reynolds number of 134.53.
Place, publisher, year, edition, pages
2015. Vol. 7, no 8, 1687814015595165
Liquid jet, surface wave, high-speed microscopic photography, spectral analysis
IdentifiersURN: urn:nbn:se:kth:diva-173776DOI: 10.1177/1687814015595165ISI: 000360429700003ScopusID: 2-s2.0-84940923956OAI: oai:DiVA.org:kth-173776DiVA: diva2:855298
QC 201509212015-09-212015-09-182015-09-21Bibliographically approved