The Metal Parts Furnace (MPF) is a custom-designed incinerator and has been successfully demonstrated for treatment of munitions containing chemical agents since the first full-scale prototype baseline incineration facility on Johnston Island in 1990. The development of a numerical model to predict peak vaporization rate and total vaporization time during processing can provide the ability to control operating parameters to minimize the potential for any upset conditions such as agent overload, and to ensure that appropriate processing conditions are chosen to achieve desired safety factors. The numerical model will also provide the capability to maximize operating efficiency and to help adjust conditions during processing of different agents and munitions configurations. The Continental Research and Engineering (CR&E) Peak Vaporization Rate (PVR) model was initially developed in 1988 for the MPF to provide munitions tray vaporization rates as a function of the MPF temperature and munitions fill level. The model was updated and calibrated to test data in 1994. The calibrated PVR model is suitable for munitions with varying quantities of liquid chemical agent; however, this model can only be used to predict the vaporization rate of the liquid chemical agent. In order to simulate the effect of the solidified agent found in the munitions, CR&E has developed a Computational Fluid Dynamics (CFD) model based the vaporization rate model to simulate heating, melting, and vaporization of liquid chemical agent mixed with a varying solid heel mass fraction.

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