Research Temperature Field Of The Head Of Projectile In Thermal Environment

The growing complexity of the modern battlefield environment asks for more stringent requirements on the design of the projectile. For the projectile in different thermal environment, different measures must be adopted to control its internal temperature to ensure its normal work and give full play to combat effectiveness.In this thesis, the internal temperature field of the head of projectile is researched, based on the given projectile shape and external thermal environment. According to heat transfer mechanism, based on certain preconditions and assumptions, the governing equation of projectile temperature field is simplified. The two basic models—solid projectile and hollow projectile are introduced. An algebraic grid generation technique is applied to generate the internal grid of projectile. Finite difference method is chosen to calculate the internal temperature field. The governing equation is discretized by control volume integration, and the methods to deal with various boundary conditions are described in detail. Flow chart is calculated to show the basic steps to solve the internal temperature field of the two basic projectile models. To prove the correctness of programs, temperature field examples in rectangular area and trapezoidal area are given. The results show that the programs used to calculate the internal temperature of projectile are feasible.The internal temperature field of solid projectile with different shapes, different thermal environment and that of hollow projectile with different thickness, different materials, different location of heat sources, different thermal protection coatings are calculated severally. The analysis indicates that level of internal temperature is closely related to many factors, and the impact of various factors must be considered. The calculation of this thesis provides temperature data for projectile design, and has certain practical value for engineering.