
By Naminosuke Kubota
Explosives and propellants comprise substantial chemical power that may be switched over into swift enlargement. unlike the straightforward burning of a gasoline, explosives and propellants are self-contained and don't desire an exterior provide of oxygen through air. on account that their strength content material inherently creates the chance of unintentional triggering of the explosive response, the right kind synthesis, formula, and dealing with in the course of creation and use are of extreme significance for protection, necessitating expert wisdom on vigorous fabrics, their features, dealing with and functions.
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Additional resources for Propellants and Explosives: Thermochemical Aspects of Combustion
Example text
35 36 3 Combustion Wave Propagation Figure 3-3. Definition of Hugoniot curve for combustion wave. The mass flow rate given by Eq. 3 Chapman-Jouguet Points As illustrated in Fig. 3-3, the Hugoniot curve is divided into five regions [1±4]. Since the velocity u2 expressed by Eq. 16) becomes an imaginary value in the region III because tan hJ is a positive value, a combustion wave is physically not possible in Region III. Points J and K are called the Chapman-Jouguet points. Chapman-Jouguet states that the velocity at J on the Hugoniot curve is the minimum value for the propagation velocity uD relative to the unburned gas, and the velocity at K is the maximum value for the propagation velocity ud relative to the unburned gas.
Propellants and Explosives: Thermochemical Aspects of Combustion. Naminosuke Kubota Copyright 2002 Wiley-VCH Verlag GmbH & Co. 1 Chemical Bond Energy All materials are composed of atoms which are tightly bonded to each other to form molecules of the materials. When chemical reaction occurs, the materials change to other materials through bond breakage and new bond formation. The chemical bond energy is dependent on the type and energetic state of the atoms based on the electrons of each atom.
2 of Chapter 2. Repeat the procedure of (3) and (4) until Eq. 9) is satisfied. Determine u1 by Eq. 7) Assume a different T2 Repeat the procedure from (3) to (7) until the minimum value of u1 is determined. The minimum value u1 is the detonation velocity uD at point J (ChapmanJouguet detonation velocity). Computations of the thermochemical values of various combinations of oxidizers and fuels are obtained from [7], and practical computations are done by the use of the computer programs described in [8].