Adjoint‐based design of shock mitigation devices

Aerodynamic shape sensitivities were calculated through an unsteady continuous adjoint Euler method in order to facilitate the design of shock mitigation devices. The adjoint time integration runs backwards restoring and interpolating the forward solution to the current point in time. The sensitivities were obtained from a surface integral formulation. Comparisons against finite-differencing gradients show less than 10 per cent deviation. The procedure provides a continuous, non-parametric sensitivity distribution over the complete domain boundaries and reveals considerable insight into the configuration from the objective point of view. It can efficiently support the designof shock mitigation devices, such as architecturally appealing blastwalls, and help to analyze the area surrounding the most dangerous blast locations.

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