On the Propagation and Structure of the Blast Wave, I

Concerning blast waves with front surfaces of plane, cylindrical and spherical shape, the propagation velocity U and the distribution of hydrodynamical quantities are discussed. The solutions are constructed in the form of power series in (C / U) 2, where C is the sound velocity of undisturbed fluid. Especially R, the distance of shock front from the charge, is represented as, aligned (CU) ^2 (R₀R) ^+1=J₀1+₁ (CU) ^2+12₂ (CU) ^4+, aligned where R 0 is the characteristic length related to the energy of explosion, J 0 and λ i are constants, and α=0, 1, 2 correspond to plane, cylindrical and spherical case, respectively. In this paper the first approximations for α=0, 1 are discussed (The case α=2 has been discussed by G. I. Taylor). The solution is obtained numerically for the case of the adiabatic index λ=1. 4. The approximate solution is also considered. Using these solutions, J 0 is found to be: