Numerical studies of acoustic and thermal coupling in sonic fatigue tests for hypersonic vehicle: AIAA AVIATION 2014 - 30th AIAA Aerodynamic Measurement Technology and Ground Testing Conference

Numerical simulations of sound-fluid coupling at high temperature were conducted in this work to assist sonic fatigue experiments, where a high intensity sound input is imposed on the test specimen heated at 1200°C. Our analysis shows that the noise induced by the unsteady horn flow and thermal fields is negligible compared to the high intensity horn noise. Then sound propagation in a fluid-thermal coupled background flow is computed by using linearized Euler equations and geometrical shielding effect is calculted simultaneously. 2D and 3D simulations of reverberation room cases are conducted at different frequencies from 100Hz to 1kHz, which provides insights for engineering designs.