Experimental and numerical investigation of flow separation in a supersonic nozzle |
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Authors: | Slavica Risti? Mirko Kozi? Mirjana Puhari? |
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Institution: | (1) Institut Gosa, Milana Rakića 35, Beograd, 11000, Serbia;(2) VTI (Military Technical Institute), Ratka Risanovića 1, Beograd, 11111, Serbia |
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Abstract: | The flow in a two-dimensional symmetric convergent-divergent supersonic nozzle with and without a deflector at the exit plane
was tested experimentally and numerically. Combined optoelectronic devices were used to demonstrate the possibilities of the
shadow and schlieren methods and holographic interferometry for the flow visualization especially in the separation region.
A series of experiments was performed in a trisonic wind tunnel (VTI, Beograd). The experimental results obtained using optical
methods are compared with the pressure measurements and numerical calculations. Numerical results were obtained using a code
for solving the average Navier-Stokes equations. Five structured meshes with different resolutions and two turbulent models
were employed. The coupled influence of the mesh resolution and the order of accuracy of the used numerical scheme is analyzed. |
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Keywords: | supersonic nozzle optical methods flow separation flow visualization CFD pressure measurements |
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