Laser Ignition Process of Energetic Particles Under Consideration of Non‐Fourier Effect

The heating and ignition process of energetic material particles under the action of the laser is investigated using numerical simulation. Due to the two characteristics of the high energy density of the laser and the high transients of the whole process, an accurate description is required with the help of the non-Fourier heat transfer theory. The corresponding mathematical model in the form of partial differential equations is developed for the laser action on the spherical particles. In the process of numerically solving the partial differential equation, adaptive grid method based on wavelets is introduced to improve the finite difference method. Based on the comparison of ignition delay time, the results obtained from numerical calculations are in agreement with the data from experimental tests.