1994•TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series BOpen access

Underexpanded Impinging Jet. Numerical Solution of Eulder Equations.

Yoko SAKAKIBARA, Junjiro IWAMOTO

Abstract

The underexpanded jet which is exhausted from the circular nozzle is studied numerically in this investigation. The jet impinges on a flat plate located normal to the jet axis. The axisymmetric Euler equations are solved using a multigrid TVD-type scheme. Jets with different pressure ratios and nozzle-plate distances are simulated. Comparing the numerical results with the experimental ones, good agreement is found and, furthermore, the effect of the nozzle-plate spacing on the wave pattern in the jet can be described. The formation of the separation bubble at a particular nozzle-plate distance is also discussed.

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Available abstract

Key concepts: Nozzle, Jet (fluid), Mechanics, Rotational symmetry, Euler equations, Physics, Bubble, Euler's formula