Jouguet Isentrope

Detonation, Chapman-Jouguet Layer. See under Detonation, Chapman-Jouguet Point 

---

Chapman-] ouguet Isentropre. See Detonation, Chapman-Jouguet Isentrope... 

L.P. Parshev, ZhPriklMekhan i TekhnFiz 1965(5), 130-31 CA 64, 3274(1966)(Calculation of the energy of a shock wave in water) 72a) W.A. Walker H.M. Sternberg, "The Chapman-Jouguet Isentrope and the Underwater Shockwave Performance of pentolite , 4thONRSympDeton (1965), pp 27-38(26 refs) 73) R. Cheret, "Theoretical Considerations on the Propagation of Shock and Detonation Waves , Ibid, pp 78-83 74) A.B. Amster et al, "Detona-... 

Expls were chosen to approximate the known molecular requirements of a C02 laser. Product compn, temp press were calcd for an isentropic expansion from the Chapman-Jouguet... 

Detonation Parameters Chapman-Jouguet Pressure, Energy, and Isentropic Exponent from Water Shock Measurements 11... 

A critical characteristic of energetic materials is the Chapman-Jouguet (CJ) state. This describes the chemical equilibrium of the products at the end of the reaction zone of the detonation wave before the isentropic expansion. In the classical ZePdovich-Neumann-Doring (ZND) detonation model, the detonation wave propagates at constant velocity. This velocity is the same as at the CJ point which characterizes the state of reaction products in which the local speed of sound decreases to the detonation velocity as the product gases expand. 

A numerical evaluation of the condensation discontinuity is performed for several values of the critical saturation ratio x - State 1 is related isentropically to a fixed reference state 0. In Fig. 1. the Rankine-Hugoniot curves and the Ma2 Ma relations are shown for a mixture of water vapour and nitrogen gas. Only those parts of the curves are shown that correspond to entropy increase, to real massflux and to positive droplet mass fraction downstream the discontinuity. The Chapman-Jouguet points, defined by Ma2 = 1, separate the curves in four different regions ... 

---