SBIR-STTR Award

This proposed study is to explore the feasibility of developing generalized models that can be used to extrapolate the results of small-scale aircraft fire suppression tests to larger fires. Because fire suppression is a complex phenomenon that is highly dependent on the type of suppresion agent, fire configuration, fuel type, rate and method of application and other factors, it is doubtful that a single model will apply to all situations. In phase I, data from previous tests will be collected and used to develop models for halon/unoccupied compartment fires, dry chemical/aircraft wing fires and foam/ fuel spill fires. If successful, additional models will be developed for other agent/fire configurations in phase II. These models will be verified using small and large scale fire tests to be designed and carried out in phase II.

Phase I of the study resulted in the establishment of independent parameters necessary to accurately predict fire control times for pool fires (with and without simulated aircraft) using AFFF and protein foam suppressants. Analytical expressions of control time were derived using both theoretical considerations and published experimental data. Phase II is expected to provide experimental data with which to validate and refine the derived models, including (1) data which can be used to separate the impacts of the presence of obstacles on fire control, (2) indications of foam parameters and their importance in the models, and (3) new prelimianry models of more sophisticated fire configurations. The tests conducted will be designed and carefully controlled using experts presently performing air force fire tests. Scatter from data collected in this manner is expected to be minimal compared to use of the widely published data used in the model derivations during phase I. Application of the models is expected to directly impact the design of fire fighting systems and protocol associated with both military and commercial aircraft.