Jets, especially in the supersonic regime, can produce sound pressure levels of 160 dB and beyond. Hence, identifying the phenomena responsible to the noise generation and finally the minimization of jet noise is of particular interest. To this end, a jet nozzle, based on a composite material of solid and porous parts is embedded in the computational domain. To minimize the emanated noise, the characteristic properties of the porous part of the nozzle, like the permeability of the material, can be optimized, based on an adjoint iterative approach.

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