Jouguet’s rule

See Detonation, Chapman-Jouguet in Vol 4 of Encycl, pp D230—37 and Jouguet s Rule, p D607-L... 

Jouguet s Rule. See in Vol 4 of Encycl, p Junk Test. See Bergmann-Junk Test in Vol... 

The most important new conclusion of the theory turned out to be the fact that in front of the zone of reaction products, whose state is determined by the Chapman-Jouguet rule, there is a certain amount of initial combustible material compressed by the shock wave. In this compressed material the pressure is approximately twice as high as the final pressure. The significance of the existence of a zone of such increased pressure is obvious not only for the theory, but also for accident prevention. Many studies are devoted to experimental proof of the existence of this zone. Perhaps still the most convincing and practically useful is a paper written by Ya.B. in collaboration with S. M. Kogarko which confirmed the conception of an increased pressure zone (28). Concrete perceptions of the conditions of the chemical reaction have changed substantially (see the commentary to 28). However, Ya.B. s... 

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