Research on Temperature Field Characteristics of a Caliber Rocket Engine

Abstract

In order to study the temperature characteristic of a rocket engine with multilay structure under different boundary conditions,an unsteady heat transfer model under multilayer structure was established. Numerical calculations were carried out by controlled volume method. Based on the test temperature data of a rocket engine with an initial temperature of -40 ℃ under the environmental condition of 20 ℃,the calculation results of numerical simulation are compared and verified. The temperature characteristics of a rocket engine of a certain caliber under different working conditions were calculated and analyzed. The results show that the temperature characteristics of multilayer materials of rocket engine can be better described by the established numerical calculation model. The temperature field of the rocket is affected by the temperature difference between the initial temperature of the charge and the ambient temperature. When the initial temperature difference between the charge temperature and the ambient temperature is large,the greater the temperature change rate,the greater the time required for the charge in the engine to reach the same temperature, and the longer the time for the charge temperature and the ambient temperature in the engine to reach complete equilibrium. Since the engine is composed of multilayer materials,the thermal conductivity of different materials also has a greater influence on the temperature field of the charge, and the greater the thermal conductivity of the material, the stronger the thermal conductivity and the greater the temperature change rate.