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http://dx.doi.org/10.5139/JKSAS.2008.36.8.774

Experimental Study on Characteristics of Micro-Supersonic Jet Flows  

Kim, Jong-Hun (한국항공대학교 항공우주 및 기계공학부 대학원)
Bang, Jin-Young (한국항공대학교 항공우주 및 기계공학부 대학원)
Lee, Yeol (한국항공대학교 항공우주 및 기계공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.8, 2008 , pp. 774-779 More about this Journal
Abstract
An experimental study on the micro-supersonic jet flow fields has been carried out. A sonic nozzle of 440 ${\mu}m$-exit diameter and a Laval nozzle of 800 ${\mu}m$ exit diameter with the nozzle exit Mach number 2.0 were fabricated by stretching a micro Pyrex glass tube for the present experiments. Schlieren flow visualization and Pitot pressure distribution of the jet flow field were obtained. Representative characteristics of the jet flow fields such as, supersonic length, jet core length, similarity of the velocity field, and jet spreading rates, have been observed. All the results were compared to previous observations of larger supersonic jets of higher Reynolds numbers, and it was found that overall characteristics of the micro supersonic jet are qualitatively similar as those of the higher Reynolds number jets, except the jet core length and the jet spreading rate.
Keywords
Micro; Supersonic Jet; Laval Nozzle;
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