Mechanism of the negative erosion effect

作者：Sabdenov K O^*; Erzada Maira

来源：Combustion, Explosion and Shock Waves, 2013, 49(3): 273-282.

DOI：10.1134/S0010508213030039

• negative erosion effect
• critical Vilyunov number
• Bulgakov-Lipanov number

A mechanism of the negative erosive burning (effect) in the channel of a rocket motor propellant charge is proposed. Reduction in the burning rate results from a decrease in the flame temperature due to conversion of the chemical reaction heat to the kinetic energy of the gas. There is a critical value of the Vilyunov number above which steady-state propellant combustion is impossible. Steady-state combustion is possible up to a factor of 1/e (1/2) decrease in the burning rate compared to the original value. An explanation is given for the weak manifestation of the negative erosion effect with a decrease in the initial propellant temperature: reducing the threshold rate of positive erosive burning narrows the region of negative erosive burning.

• 出版日期2013-3