PSP visualization studies on a convergent nozzle with an |
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| Authors: | H Zare-Behtash N Gongora-Orozco K Kontis |
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| Institution: | (1) Faculty of Education, Art and Science, Yamagata University, Yamagata, Japan;(2) Department of Aeronautics and Astronautics, Tokai University, Hiratsuka, Japan;(3) Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Japan;(4) Department of Aerospace Engineering, Tohoku University, Sendai, Japan |
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| Abstract: | An in-house Pressure Sensitive Paint (PSP) formulation has been developed at the Aero-Physics Laboratory at the University
of Manchester. The PSP uses Bathophenanthroline Ruthenium as the luminophore molecule and is incorporated in a sol-gel matrix.
Excitation occurs at400–500 nm and emission at550–650 nm. The Stern-Volmer plot of the PSP reveals small temperature dependence, which has always been an intrinsic drawback of PSPs.
As a baseline experiment the PSP has been applied to examine the side-wall pressure field of the flow through a convergent
nozzle with an ejector, at fully expanded Mach numbers in the rangeM
j
=0.52–1.36. Simultaneous static pressure measurements were also conducted to ascertain the accuracy of the PSP results. The paint has
demonstrated satisfactory capabilities in not only measuring static pressures but also in visualizing key physical elements
of the flow, such as the location of the expansion and oblique shock waves present in such flows. |
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