High-Order Numerical Simulation of Rocket Launch Noise

The aerodynamic noise propagation from a rocket engine before lift-off has been simulated by solving the axisymmetric Euler equations with a high order difference method. The sound source at the launch table is modelled by a time harmonic velocity perturbation at the dominant frequencies of the Ariane V launch vehicle. Perturbations corresponding to 120 dB sound pressure level lead to a sound pressure level of 112 dB at the nose of the rocket.