Study on the dynamical characteristics of a supersonic high pressure ratio underexpanded impinging ideal gas jet through numerical simulations |
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Authors: | P Dubs M Khalij R Benelmir A Tazibt |
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Institution: | a LEMTA - UMR 7563 CNRS, ESSTIN, Université Henri Poincaré - Nancy 1, 2 Rue Jean Lamour, 54500 Vandoeuvre Lès Nancy, France;b LERMAB - Université Henri Poincaré - Nancy 1, Campus Victor Grignard, BP 239 54506 Vandoeuvre-Lès-Nancy, France;c CRITT TJF&U - 8 Parc Bradfer, 55000 Bar-le-duc, France |
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Abstract: | The impingement of an axisymmetric underexpanded ideal gas jet on a flat surface is investigated through numerical simulations. Different injection conditions, characterized by the nozzle pressure ratio (NPR), have been considered and for each, several standoff distances were studied. The study was conducted using the commercial finite volume general purpose code Fluent®. The numerical results are presented in terms of Mach number and static pressure to characterize the structure of the flow. Furthermore, the influence of the standoff distance upon the position and diameter of Mach disk is analysed. Some results are compared with literature data and good agreement is obtained. |
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Keywords: | Underexpanded jet Supersonic Numerical simulation Impinging jet Mach disk |
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