TY - GEN
T1 - FEM simulation of laser-induced plasma breakdown experiments for combustion applications
AU - Alberti, Andrea
AU - Munafò, Alessandro
AU - Sahai, Amal
AU - Pantano, Carlos
AU - Panesi, Marco
N1 - Funding Information:
This material is based in part upon work supported by the Department of Energy, National Nuclear Security Administration, under Award Number DE-NA0002374. The authors gratefully acknowledge Prof. M. L. Adams and Prof. J. E. Morel at Texas A&M University, and Dr. J. H. Cooley at Los Alamos National Laboratory for the useful scientific discussions. The authors would like also to thank Dr. A. Wray and Mr. J. Meurisse at NASA Ames Research Center for the help during the implementation of the Finite Volume solver for radiative transfer.
Publisher Copyright:
© 2017 by Andrea Alberti.
PY - 2017
Y1 - 2017
N2 - In this work, a physical model for Laser Induced Breakdown in air for combustion applications is proposed. Inverse Bremsstrahlung, air breakdown chemistry and shock dynamics are taken into account. The air plasma is modeled via the Navier-Stokes equations, where non-equilibrium effects are described by means of a two-temperature model. The flow governing equations are coupled to the radiative transfer equation (i.e., Kinetic Theory of photons) to account for laser-plasma interactions. The two sets of governing equations are solved using the FIN-S framework, where the Navier-Stokes equations are discretized based on an SUPG Finite Element Method. The discretization of the radiative transfer problem is accomplished via a Finite Volume method. Simulations are performed to predict the plasma evolution during breakdown and post-breakdown stages. A comparison between the computed and experimentally determined shock diameter is also reported, showing a good agreement between the two predictions.
AB - In this work, a physical model for Laser Induced Breakdown in air for combustion applications is proposed. Inverse Bremsstrahlung, air breakdown chemistry and shock dynamics are taken into account. The air plasma is modeled via the Navier-Stokes equations, where non-equilibrium effects are described by means of a two-temperature model. The flow governing equations are coupled to the radiative transfer equation (i.e., Kinetic Theory of photons) to account for laser-plasma interactions. The two sets of governing equations are solved using the FIN-S framework, where the Navier-Stokes equations are discretized based on an SUPG Finite Element Method. The discretization of the radiative transfer problem is accomplished via a Finite Volume method. Simulations are performed to predict the plasma evolution during breakdown and post-breakdown stages. A comparison between the computed and experimentally determined shock diameter is also reported, showing a good agreement between the two predictions.
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U2 - 10.2514/6.2017-1111
DO - 10.2514/6.2017-1111
M3 - Conference contribution
AN - SCOPUS:85017247092
T3 - AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
BT - AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - 55th AIAA Aerospace Sciences Meeting
Y2 - 9 January 2017 through 13 January 2017
ER -