Dynamics of redirected flashing jets of a fire suppression agent

David A. Kessler, Brian D. Taylor, Andrew Corrigan, David R. Mott

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We discuss the dynamics of a jet of multi-phase fire suppression agent that issues from a simple pipe distribution network fed by a pressurized plenum and obliquely impacts a solid obstruction. One-dimensional multi-phase pipe flow simulations are used to estimate the time-varying discharge properties, including the liquid fraction at the exit plane. The flow is found to be choked and partially evaporated for the duration of the discharge event. We use two different models for the ash evaporation that will take place outside of the piping network. The first is a simple evaporation wave model where the flow is instantaneously accelerated as complete phase change occurs. This evaporation wave is anchored to the outflow of the distribution piping and results in a sonic single-phase jet that impacts the obstruction. The second model assumes the fluid is in thermodynamic equilibrium and phase change occurs along saturation curves as the local thermodynamic state changes due to the expansion of the jet. We compare the compressible wave structures and corresponding jet dynamics that result from the choice of phase change model.

Original languageEnglish
Title of host publication46th AIAA Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104367
StatePublished - 2016
Externally publishedYes
Event46th AIAA Fluid Dynamics Conference, 2016 - Washington, United States
Duration: 13 Jun 201617 Jun 2016

Publication series

Name46th AIAA Fluid Dynamics Conference


Conference46th AIAA Fluid Dynamics Conference, 2016
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics. All rights reserved.


Dive into the research topics of 'Dynamics of redirected flashing jets of a fire suppression agent'. Together they form a unique fingerprint.

Cite this