The objective of this project is to demonstrate how the foam quality (expansion ratio and drainage time) affects the capabilities of the newly developed PFAS-free or  Fluorine Free Foams (FFF) and to relate these capabilities to the foams produced by the various discharge devices used throughout the Department of Defense (DoD).

This project consists of two separate/parallel tasks; a demonstration (and characterization) of the foam quality produced by the various discharge devices used throughout the DoD, and, a demonstration of the capabilities of these new FFF as a function foam quality and flow rate using the MILSPEC fire tests as the basis of this demonstration.

The capabilities of the new FFF are almost entirely dependent on the characteristics of the foam blanket (i.e., foam quality). The foam blanket serves to contain the fuel vapors and prevent the production of a flammable fuel vapor mixture above the fuel surface. This program begins to demonstrate the capabilities of these new FFF from a mechanistic standpoint as well as the need to link the small scale approval test conditions to actual fielded conditions. This link may serve as the first step in developing a new foam specification for landbased applications (i.e., a new MILSPEC for landbased use).