Computational study of curved shock-vortex interaction

摘要

The interaction between a curved shock wave and a compressible vortex is numerically investigated. The investigation concentrates on the local deformation of the shock structure due to the shock-vortex interaction. The essentially non-oscillatory(ENO) scheme is used to solve the unsteady two-dimensional Euler equations. A curved shock wave is obtained by the diffraction of an initially planar shock wave around a right-angled corner and then allowed to interact with a strong compressible vortexsuperimposed on the flow. The same vortex affects the shock wave differently depending on the placement of the vortex because of the varying strength of the shock wave. This effect could range from a non-symmetric deformation of the shock wave to a localdisruption in the shock structure depending on the strength of the shock wave in the interaction region. This process leading to a local disruption in the shock structure is analyzed in detail. It is shown that such a disruption in the shock structure can be predicted by simple one-dimensional considerations.