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Simulation of Combustion Systems with Realistic g-jitterIn this project a transient, fully three-dimensional computer simulation code was developed to simulate the effects of realistic g-jitter on a number of combustion systems. The simulation code is capable of simulating flame spread on a solid and nonpremixed or premixed gaseous combustion in nonturbulent flow with simple combustion models. Simple combustion models were used to preserve computational efficiency since this is meant to be an engineering code. Also, the use of sophisticated turbulence models was not pursued (a simple Smagorinsky type model can be implemented if deemed appropriate) because if flow velocities are large enough for turbulence to develop in a reduced gravity combustion scenario it is unlikely that g-jitter disturbances (in NASA's reduced gravity facilities) will play an important role in the flame dynamics. Acceleration disturbances of realistic orientation, magnitude, and time dependence can be easily included in the simulation. The simulation algorithm was based on techniques used in an existing large eddy simulation code which has successfully simulated fire dynamics in complex domains. A series of simulations with measured and predicted acceleration disturbances on the International Space Station (ISS) are presented. The results of this series of simulations suggested a passive isolation system and appropriate scheduling of crew activity would provide a sufficiently "quiet" acceleration environment for spherical diffusion flames.
Document ID
20030062163
Acquisition Source
Headquarters
Document Type
Contractor or Grantee Report
Authors
Mell, William E. (Utah Univ. Salt Lake City, UT, United States)
McGrattan, Kevin B. (National Inst. of Standards and Technology Gaithersburg, MD, United States)
Baum, Howard R. (National Inst. of Standards and Technology Gaithersburg, MD, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2003
Subject Category
Inorganic, Organic And Physical Chemistry
Funding Number(s)
CONTRACT_GRANT: NAG3-2403
Distribution Limits
Public
Copyright
Public Use Permitted.

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