关键词: 固体火箭发动机;推力室压力

Abstract: In this paper,the fundamental requirements for defining the physical parameters are discussed,and the equilibrium pressure is defined.The stable condition of equilibrium pressure and the approximate relationship between the chamber pressure and the equilibrium pressure are derived.In the case of a side-burning grain of a solid propellant rocket engine,only few particular points along the chamber pressure versus time curve under the stable condition are kept in equilibrium. The rest on the curve remain in quasi equilibrium.

Key words: Solid rocket engine;Thrust chamber pressure