【摘要】 本文提出了计算偏二甲肼液滴在惰性介质中的临界着火条件的两种理论。一种是类似于弗朗克-卡敏涅茨基对均匀可燃混气自燃所用的稳态分析理论。应用这一理论并经数值计算,得到了关联无因次蒸发速率和环境温度的反C形曲线,曲线的顶点即相当于临界着火点。另一种是稳态简化模型理论,它给出了方便于工程应用的临界着火准则显式。更多还原

【Abstract】 Two computation theories of critical conditions for ignition of UDMH droplet in an inert atmosphere are presented. One is a steady-state analytical theory which is in analogy with Prank-Kamenetski’s stationary analysis of self-ignition, but requiring numerical computations. Using this theory, a inverse-C-shaped curve relating non-dimensional vaporization rate to the ambient temperature is obtained. Another is a steady-state theory of simplified model which gives an explicit expression for the ignition criterian, convenient to engineering applications.更多还原