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http://dx.doi.org/10.5139/JKSAS.2005.33.4.079

Measurement of Adiabatic Wall Temperature on an Impinging Surface by Under-expanded Jet  

Yu, Man-Sun (연세대학교 기계공학과)
Lee, Jang-Woo (연세대학교 기계공학과)
Kim, Byung-Gi (LG전선)
Cho, Hyung-Hee (연세대학교 기계공학과)
Hwang, Ki-Young (국방과학연구소)
Bae, Ju-Chan (국방과학연구소)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.4, 2005 , pp. 79-84 More about this Journal
Abstract
An experimental investigation for impingement of under-expanded, axisymmetric jets on a flat plate has been conducted, and the surface pressure, the adiabatic wall temperature distributions on the plate have been measured in detail. For the explanation on the wall temperature distributions, the total temperature distributions along a free jet have also been measured with total temperature probes. In this study, the under-expansion ratio and the nozzle-to-plate distance have been considered as experimental parameters. Depending on nozzle-to-plate distances, different distributions of adiabatic wall temperature are shown by the energy separation at a jet edge and a impinged surface. Also, the recovery factor on a stagnation point decreases significantly due to the isolation of fluid particles in a central region.
Keywords
Under-expanded jet; Recovery factor; Energy separation;
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