On the efficiency of using a real pressure dependence of the solid propellant burning rate in a solid rocket motor

A comparative analysis of maximum pressures in a solid rocket motor obtained using exponential and real pressure dependences of the solid propellant burning rate on was performed. It is shown that at high exponents in the burning law, there is a large (tens of percent) difference between the maximum motor pressure obtained by the above two methods. In the case where the exponent is in the range of 0.3–0.4, the exponential pressure dependence of the burning rate overestimates motor pressure only by 2–3%.