Numerical modeling of pressure pulsations in 3D cavities

Supersonic flow near an open 3D cavities was numerically considered. Nonstationary regimes were carefully examined. Most attention has been given to the study of such flow regimes when resonance pressure pulsations are exiting. The influence of Mach numbers $\mathrm{M}_\infty$ and various geometric sizes (lengh $l$ and width $\omega$) to the amplitudes and frequencies of these pressure oscillations are investigated. A distinguishing features of three-dimensional supersonic flow in comparison with two-dimensional cases have emerged from numerical analysis. The explicit kinetic-consistent finite difference schemes (KCFDS) were selected to perform the numerical calculation.