Numerical Calculations in Support of Complex Shock Interactions
Results of numerical calculations of complex shock interactions with simple structures are presented. These calculations are the first in a series intended to demonstrate the capabilities of modern high-order codes. The calculational results are compared to experimental data collected at the Ernst Mach Institute in Germany and Waterways Experiment Station in Vicksburg, Mississippi. Specifics of the conditions for the calculations were selected to test the code’s capability to properly model shock loading in complex flows in which shocks interact with vortices. The early calculations in the series use non-responding structure elements in two dimensions. Square-wave incident shock waves are used for the first calculation. An ideal gas equation-of-state is used for this case. The second calculation uses a similar structure with an incident two-dimensional, decaying blast wave. The second calculation includes the effects of detonation products as well as real equations-of-state for the air and detonation products. A third calculation is planned for full three-dimensional interactions with the blast wave from a spherical charge. The structure is also non-responding for this case. Shock geometry comparisons are available from the two-dimensional cases. Some cases include laser interferograms, which give measurements of the density distribution in the shocked regions. No pressure data is available from the two-dimensional cases at the present time. Comparisons will be made with the calculated density fields. If data become available, comparisons will be made with pressure waveforms at selected locations as well.
Key wordsComputational Fluid Dynamics Complex shock interactions Flow visualisation
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- Reichenbach H, Kuhl AL (1992) Flow visualisation of shock propagation in baffle systems. Fraun-hoffer Gesellschaft, Ernst-Mach-Institut, Freiburg, GermanyGoogle Scholar