Burning Rate Characteristics of Energetic Materials

Burning Rate Characteristics of Energetic Materials 3.5.3.1 Pressure Exponent of Burning Rate 

In general, the burning rate of energetic materials increases linearly as pressure increases in a In p versus In r plot represented by Eq. (3.68) at constant initial temperature T0, where r is burning rate and p is pressure. Thus, the pressure sensitivity of the burning rate at a constant initial temperature is defined by 

Equation (3.68) is called Vieille s law or Saint Robert s law, and n, defined in the pressure exponent, and a are dependent on the chemical composition and the initial propellant temperature. 

The burning rate of any energetic materials depends also on the initial temperature of the materials, T0, even when the burning pressure is kept constant. The temperature sensitivity of burning rate, ap, is defined by the change of burning rate when T0 is changed as 

The temperature sensitivity of the burning rate defined in Eq. (3.72) is a parameter of considerable relevance in energetic materials. 

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