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The Transport of Water Sprays Past Generic Clutter Elements Found within Engine Nacelles



P J. Disimile, J R. Tucker, B Croswell, John M. Davis


The current work is presented as part of an effort to develop a spray transport model that would be used within the computational fire code currently under development by Sandia National Laboratory. As part of a halon replacement research program, new high-boiling-point chemical suppressants have been identified. These agents would discharge in a liquid state and initially result in the transport of liquid droplets through a portion of the nacelle, impinging on various objects prior to reaching the fire zone. The goal of this research effort is to enhance the fundamental knowledge of spray interactions with clutter (e.g., obstacles representing fuel and hydraulic lines, electrical wire bundles, etc). This paper reports an investigation into the effect of generic cylindrical clutter elements on the performance of a suppressant spray impinging on various clutter densities and porosities. Specifically the amount of agent (water/air spray) that is able to pass through a generic clutter configuration is presented as a function of clutter spacing and surrounding air flow (0.5 – 6.5 m/s) at nominal turbulence levels of 10%.
Special Publication (NIST SP) - 984-4
Report Number


Disimile, P. , Tucker, J. , Croswell, B. and Davis, J. (2005), The Transport of Water Sprays Past Generic Clutter Elements Found within Engine Nacelles, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed June 21, 2024)


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Created January 1, 2005, Updated February 19, 2017