Numerical studies of laser-induced energy deposition for supersonic flow control

We have developed a model for laser energy deposition in air for flow control applications. The model captures the key physical processes including inverse bremsstrahlung absorption, plasma reflection, air breakdown chemistry and the fluid dynamics of the resulting pressure wave. We have validated this model with experiments done in quiescent air. The energy deposition process in three-dimensional supersonic flows was studied. We find significant surface pressure reductions, and our model shows that the delayed release of chemical energy enhances the pressure mitigation. The results of the simulations suggest that there is a potential for optimizing control of Edney Type IV shock interactions.