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在研制新式箱式发射系统时,炽热火箭燃气流的排导是个特别重要的问题。为此需要特殊的材料保护发射装置和舰艇免受火箭发动机燃气流的损坏。由于从导弹发动机中排出大量的高温燃气,还由于燃气流在舰艇内必须得到安全的排导,所以在设计“标准导弹”垂直发射系统(VLS)时要求是特别苛刻的。在分析流过新式导弹发射系统的内部燃气流时,由于许多复杂的因素强烈影响着瞬变内弹道特性,因此在瞬变内弹道特性方面是一个棘手的问题。例如,该系统内运动的压力波对结构设计的机械强度有影响。紊流对流传热将燃气流的热量传给了导弹发射系统,因此在装运箱和发射装置内表面的结构设计上要求使用防热材料。当火箭燃气流流过该系统时,气流内部将发生复杂不良的化学反应,以致引起化学组成的变化,因此各个点上的物质性质将不同。
The draining of the hot rocket gas stream is a particularly important issue in the development of the new box launch system. For this purpose, special materials are required to protect launchers and warships from the rocket motor gas stream. The requirement to design a “standard missile” vertical launch system (VLS) is particularly harsh due to the large amount of hot gas discharged from the missile engine and the need to have a safe stream of gas within the ship. In analyzing the internal gas flow through a new missile launch system, it is a thorny issue in transient interior ballistic characteristics because of the many complex factors that strongly affect the transient interior ballistic characteristics. For example, pressure waves moving within the system have an effect on the mechanical strength of the structural design. Turbulent convective heat transfer passes the heat of the gas stream to the missile launch system and therefore requires the use of heat-resistant materials in the structural design of the inner surface of the shipping container and launcher. As rocket gas flows through the system, complex and undesirable chemical reactions can occur inside the gas stream, causing changes in chemical composition, so the material properties at each point will be different.