ACOUSTIC-GRAVITY WAVES PRODUCED BY ENERGY RELEASE
RAND CORP SANTA MONICA CA
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A complete asymptotic analysis is carried out for the flow field produced by the instantaneous release of energy, at a point on the ground, in an isothermal atmosphere. A double integral representation of the flow is constructed from Laplace-Handel transforms of the linearized equations. An asymptotic approximation to the integral is obtained by two successive applications of the method of stationary phase. It is found that there are three principal groups of dispersive waves behind the spherical acoustic front. One of these groups is contained in a high frequency band, and the other two are contained in a low frequency band. The spatial domain of the low frequency waves is cut off by a front caustic, the location of which is calculated. Some of the characteristics of the flow are discussed.
- Radiofrequency Wave Propagation