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By Robert H. Cole

Nonfiction, technology. study on topic of underwater explosions. initially released via Princeton collage Press in 1948.

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Транслятор и справочник сталей ведущих стран мира на немецком языке.
Доп. информация: Сканировал лично. Встречал раздачу справочника 2004 г. Этот - за 1992 г.

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Shock fronts is so small as to be virtually undetectable by direct measurement, and the gradients of pressure and particle velocity are so large that hydrodynamical methods are no longer applicable to their detailed description. 8. Two Different Media In our review of the hydrodynamic conditions in fluids, we have so development and propagation of pressure waves far considered only the in an infinite account is medium. taken of the Even this development is incomplete unless way in which conditions in the gas sphere are related to those in the water at their boundary, and in practical cir- cumstances the medium of propagation is of finite extent.

23) becomes the propagation of the function G{r, t) in cases. For in- HYDRODYNAMICAL RELATIONS This has the solution that G —^ as r —> "^ 31 $ = $(/) by integration, applying the condition In this case, therefore, the function rQ, = d^/dt . propagated outward with infinite velocity. If the disturbance is weak, terms involving u^ are negligible and the wave equa- is sufficiently tion has a solution of the form ^ = ^{t — r/co) for an outgoing wave, where In this case then, G = rQ, Co is evaluated for the undisturbed medium.

4. A further consid- Riemann equations apply only where dissipation effects can be neglected. 5. Although Penney's method of integrating the Riemann equations is simple and eration is the fact that the straightforward in principle, the numerical calculations are sufficiently tedious and complex that they have been carried out only to six charge radii for one explosive, TNT. It is therefore highly desirable to have a more flexible analytic theory not involving excessive approximation which can readily be applied to a number of explosives and a wide range of distances.

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