Modeling of Plasma Assisted Ignition,Combustion and Detonation

Publications

 2025

  1. Bak, S. Pokharel, R.B. Miles, A.Tropina, Plasma decay and energy coupling of femtosecond laser-induced plasma filaments in N2–O2 mixtures, J. Appl. Phys. 138, 043302 (2025).
  2. Pokharel, A. Tropina, Characteristics of femtosecond laser induced filament and energy coupling by nanosecond laser pulse in air, J. Appl. Phys. 137, 213303 (2025).
  3. Pokharel, A. Tropina, R.B. Miles, Refractive index modification and plasma characteristics of a femtosecond laser-induced filament in nitrogen, J. Phys. D: Appl. Phys. 58 145201, 2025.
  4. Letkeman, A.Tropina, R.B. Miles, Analysis of Refractive Index Changes Near Ablative Surface of Hypersonic Vehicle, J. of Thermophysics and Heat Transfer, 2025, https://doi.org/10.2514/1.T716

2024

  1. Tropina, R.B. Miles, M.N. Shneider,” Non-paraxial effects in dual-pulse laser energy deposition”, Optics Express, 2024, Vol.31, p. 36697-36707.
  2. Bak, G. Urdaneta, S. Pokharel, R.B. Miles, A.Tropina, Two-dimensional high resolution electron properties of femtosecond laser-induced plasma filament in atmospheric pressure argon, Scientific reports, 2024, Vol. 14, p. 3703.
  3. Anaya, N. S. Manavi, A. A. Tropina, A. Dogariu, R. B. Miles, and M. S. Grover, Interferometry analysis and CARS measurements of nonequilibrium in hypersonic oxygen/argon and pure oxygen flows,” Experiments in Fluids, 2024, vol. 65, no. 5, pp. 1–20.

2023

  1. Pokharel, A. Tropina, Self-consistent Model and Numerical Approach for Laser-Induced Non-equilibrium Plasma, J. Appl. Phys., 2023, Vol. 134, p. 223301.
  2. Pokharel, A. Tropina, M.N. Shneider, Numerical modeling of laser heating and evaporation of a single droplet, Energies,2023, 16(1), p. 388.
  3. Bak, A. Tropina, J. Creel, R.B. Miles, Characterizations of thermionic surface cooling in thermionic discharge, https://arxiv.org/pdf/2310.12412.pdf , Plasma Sources Sci. Technol., 2023.

2022

  1. Rupali S., Tropina A.A., R.B. Miles. Isentropic plasma sheath model for improved fidelity, Physics of Plasmas, 2022, Vol.29, p. 040701.
  2.   Rupali S., Tropina A.A., D. Andrienko, R.B. Miles. Cesium seeding for effective electron transpiration cooling in hypersonic flows, Plasma Sources Sci. Technol., 2022, Vol. 31, p.035001.
  3.   Tropina A.A., M.N. Shneider, R.B. Miles,Nonequilibrium plasma in water vapor, Plasma Sources Sci. Technol., 2022, https://doi.org/10.1088/1361-6595/aca0bd, 31, p. 114005.

2017-2021

  1. Mahamud, R., Hartman, D.W.,  Tropina A.A. R. Dynamics of dual-pulse laser energy deposition in a supersonic flow, Journal of Physics D: Appl. Physics, 2020, Vol.53, p. 265201.
  2.  Tropina, A.A., Wu, Y., Limbach, C.M., Miles, R.B. Vibrational non-equilibrium influence on the polarizability and refraction index of air: computational study, Journal of Physics D: Appl. Physics, 2019, Vol.53, 105201.
  3.  Tropina. Microwave assisted flame with sodium seeding. IEEE Trans. on Plasma Sci., Jan.2019, Vol.47, pp.104-108.
  4.  Mahamud, A.A. Tropina, M. N. Shneider,  R.B. Miles. Dual-Pulse Laser Ignition model, Phys. of Fluids, 2018, Vol.30, p.106104.
  5.  Tropina A.A., Shneider M.N., Miles R.B. Mathematical Model of Dual-Pulse Laser Ignition, Journal of Propulsion and Power, 2017,  34, No. 2 (2018), pp. 408-414.

Conference proceedings 

  1. Letkemann, A. Tropina, R.B. Miles, Comparison of Surface Chemistry Models for the Calculation of Refractive Index Along Hypersonic Vehicle, Aviation Forum and ASCEND, 2025, 20 July- 25 July, Las Vegas, NV, AIAA 2025-3481.
  2. Anderson-Ciccone, L. Riley, M. Maikov,  A.Tropina, R.B. Miles, Analysis of Magnetic Field Effects on Radio Signal Propagation Through Hypersonic Layer Plasma, Aviation Forum and ASCEND, 2025, 20 July- 25 July, Las Vegas, NV, AIAA 2025- 3849.
  3. Pokharel, J. Bak, A. Tropina, R. B. Miles, Plasma Enhancement of fs-Filament in N2-O2 Mixture With ns-Heating Pulse, AIAA SciTech 2025 Forum, 6-10 Jan, Orlando, FL, AIAA 2025-1391.
  4. Urdaneta, J. Bak, S. Pokharel, A. Tropina, R. B. Miles, A. Dogariu, Implementation of Laser Thomson Scattering for Femtosecond Laser-Generated Plasma Channel Characterization, AIAA SciTech 2024 Forum, 8-12 Jan, Orlando, FL, AIAA 2024-0804. https://arc.aiaa.org/doi/pdf/10.2514/6.2024-0804
  5. Pokharel, A. Dogariu, R. B. Miles, A. Tropina, Refractive index modification induced by femtosecond laser filament, AIAA SciTech 2024 Forum, 8-12 Jan, Orlando, FL, AIAA 2024-2603.
  6. Bak, S. Pokharel, H. Hadden, A. Naidu, K.T. Ruggles,  A. Tropina, R. B. Miles, Laser intensity shaping: hydrodynamic effects and energy coupling in dual pulse laser energy deposition, AIAA
  7. SciTech 2024 Forum, 8-12 Jan, Orlando, FL, AIAA 2024-2241.
  8. Tropina, S. Pokharel, H. Tidmore, J.R. Creel, M.N. Shneider, Laser pulse ellipticity and ionization effects, AIAA SciTech 2024 Forum, 8-12 Jan, Orlando, FL, AIAA 2024-2242. https://arc.aiaa.org/doi/abs/10.2514/6.2024-2242
  9. J. Anaya, E. Anderson, A. Tropina, R.B. Miles, M. Grover, Refractive index in high-speed flows: ionization effects, AIAA SciTech 2024 Forum, 8-12 Jan, Orlando, FL, AIAA 2024-1026.
  10. Tropina, S. Pokharel,  Non-paraxial effects in laser energy deposition, 30th Symposium on Plasma Physics and Technology, 10th-20th June, 2024, Prague, Czech Republic, Plasma Physics and Technology, 2024, vol. 11 no. 2, p.25.
  11. Letkemann, A. Tropina, R.B. Miles, Analysis of Refractive Index Changes Near the Ablative Surface of Hypersonic Vehicles, Aviation Forum, 2024, 29 July- 2 August, Las Vegas, NV, AIAA-Paper 2024.
  12. Anderson-Ciccone, N. Sai Kolappan, A.Tropina, N. Tichenor, Optimization of Antenna Positions and Electromagnetic Mitigation Techniques in Hypersonic Flows, Aviation Forum, 2024, 29 July- 2 August, Las Vegas, NV, AIAA-Paper 2024.
  13. S Pokharel, J. Bak, Tropina, R.B. Miles. Beam Shaping for the Laser Energy Deposition in Air, AIAA SciTech 2023 Forum, 23-27 Jan, National Harbor, MD, AIAA 2023-0352.
  14. Anaya, A. Tropina, R.B. Miles, M.Grover. Refractive index of diatomic species for nonequilibrium flows. AIAA Aviation Forum 2023, June 12-June 16, San-Diego, AIAA 2023-3478.
  15. S. Manavi, A. Tropina, R.B. Miles, M. Grover. Nonequilibrium effects in high-speed flow: experiment and simulation, AIAA SciTech 2023 Forum, 23-27 Jan, National Harbor, MD, AIAA 2023-1798.
  16. Tropina, Shell models of turbulence in aero-optics , Aerospace Europe Conference 2023 – 10th EUCASS – 9th CEAS, Lausanne, Switzerland, 9-13 July, DOI: 10.13009/EUCASS2023-756.
  17. Tropina , M.N. Shneider, Effect of light ellipticity on laser induced plasma, 76th Annual Gaseous Electronics Conference, Oct. 9–13, 2023; Ann Arbor, MI, https://meetings.aps.org/Meeting/GEC23/Session/DF2.5.
  18. S Pokharel, A Tropina, MN Shneider,Three-dimensional effects in dual-pulse laser energy deposition, – AIAA SCITECH 2022 Forum, 2022, San-Diego, Jan 3-7, AIAA 2022-2260.
  19. Tropina, R.B. Miles. Parametrical study of aero-optical effects using shell model of turbulence, AIAA SciTech 2022 Forum, AIAA 2022-0986.
  20. Sahu, A.Tropina, A. Andrienko, R.B. Miles, Plasma sheath models for electron transpiration cooling in hypersonic vehicles. AIAA SciTech 2022 Forum, AIAA 2022-0982.
  21. Sahu, A.Tropina, R.B. Miles, Magnetized radio-frequency sheath in low temperature plasma. AIAA SciTech 2022 Forum, AIAA 2022-0981.
  22. Sahu, A.Tropina, R.B. Miles. Collisional plasma sheath effects on thermionic electron emission,          AIAA Aviation Forum 2022, June 27-July 1, Chicago, IL, AIAA 2022-3877.
  23. Manavi, A.Tropina, R.B. Miles, M.S. Grover. Refractive index of nitrogen in thermochemical nonequilibrium, AIAA Aviation Forum 2022, June 27-July 1, Chicago, IL,  AIAA 2022-3440
  24.  D. Andrienko, R.Sahu , A. Tropina, R.B. Miles, K.Hara. Computational fluid dynamic model of electron transpiration cooling in weakly ionized air flows, AIAA SciTech Forum 2021, AIAA Paper 2021-0684.
  25. Bak, A. Tropina, C. Limbach, R.B. Miles, J.Creel. Study of electron transpiration cooling under rapid laser heat flux modulation, AIAA Aviation Forum 2022, June 27-July 1, Chicago, IL, AIAA 2022-3580.
  26. Tropina, R.B. Miles. High Temperature Nonequilibrium Effects on Atomic and Molecular Polarizability, 74th Annual Gaseous Electronics Conference, October 4-8, 2021, RR43.00006.
  27. Hartman, A.Tropina, R.B. Miles. Numerical analysis and prediction of Aero-optical effects, AIAA SciTech Forum 2021 (online), AIAA Paper 2021-0335.
  28. Tropina A.A., Shneider M.N, Miles R.B. Nanosecond pulsed discharge in a water vapor. AIAA SciTech  Forum 2021 (online), AIAA Paper 2021-1024.
  29. Pokharel S., Tropina A.A., Shneider M.N. Effects of the Laser Intensity Profile on Ignition of Hydrogen-Air Mixture, AIAA SciTech Forum 2021(online), AIAA Paper 2021-1788.
  30. Sahu, A.A. Tropina, R.B. Miles. Sheath layer effects on electron transpiration cooling, AIAA Aviation Forum, AIAA Paper 2021-3119.
  31. Sahu, A.Tropina, R.B. Miles. Fluid modelling of plasma sheaths with thermionically emitted electrons, Joint Spring 2021 Meeting of the Texas Sections of APS, AAPT and SPS Zone 13, 8-11 April, 2021, A04.00004.
  32. Pokharel, A.A. Tropina, M.N. Shneider, Vorticity Generation with Defocusing Effect for Dual-Pulse Laser Plasma in Air, 74th Annual Gaseous Electronics Conference, October 4-8, 2021, TF14.00003.
  33. Tropina, D. Andrienko, R.B. Miles. Modeling studies of electron transpiration cooling at high-speed flows. Aviation Forum 2020, AIAA 2020-3231.
  34. Mahamud, A. Tropina, R.B. Miles. Numerical Study of Laser-Induced Ignition at high speed flows, Aviation Forum 2020, AIAA 2020-3232.
  35. Tropina, A.A., New-Tolley,M.R.,   Shneider, M.N. Modeling of laser ignition in hydrogen-air mixture, AIAA SciTech  Forum, 6–10 January 2020, Orlando, FL, AIAA-2020-1892
  36. Mahamud R., Tropina A.A., Miles R.B. Deflagration to detonation transition assisted by equilibrium and non-equilibrium plasma. AIAA Aviation Forum , 17–21 June 2019, Dallas, TX, AIAA 2019-3119.
  37. Hartman, D.W., Tropina A.A., Mahamud, R. Dual-pulse laser energy deposition for the supersonic flow control, AIAA Aviation Forum , 17–21 June 2019, Dallas, TX, AIAA 2019-3119.
  38. Tropina A.A., Mahamud R., Shneider M.N., Miles R.B. Matematical modeling of dual-pulse laser ignition in a turbulent flow. AIAA SciTech  Forum , 7–11 January 2019, San-Diego, CA, AIAA-2019-0741.
  39. Wu,Limbach C.M., Tropina A.A., Miles R.B. Space and time analysis of the N2 vibrational non-equilibrium in the N2 and air nanosecond discharge afterglow, AIAA SciTech Forum , 7–11 January 2019, San-Diego, CA, AIAA-2019-2066.
  40. Mahamud R., A.Tropina, Shneider M.N., Miles R.B. Two-dimensional non-equilibrium plasma model for dual-pulse laser ignition, 71st Annual GEC, Nov 5-9, 2018, Portland, Oregon.
  41. Tropina A.A., Wu Y., Limbach C., Miles R.B. Aero-optical effects in non-equilibrium air. 49th AIAA Plasmadynamics and Lasers Conference,  25 – 29 June 2018,| Atlanta, Georgia,AIAA-2018-3904.
  42. Tropina A.A., Miles R.B. Combustion Dynamics of Microwave Enhanced Flame, AIAA SciTech Forum , 8–12 January 2018, Kissimmee, FL, AIAA-2018-1196.
  43. Tropina A.A., Miles R.B., Combined Discharge Ignition at Elevated Pressures, 14th Conf. on Fluid Control, Measurements and Visualization, 2017, 8-12 oct., 2017, South Band, IN, p.42.
  44. Tropina A.A., Shneider M.N., Miles R.B. Modeling of Dual-Pulse Laser Ignition, AIAA Paper 2017-1972, 55th AIAA SciTech Forum , 9 – 13 January 2017, Grapevine, Texas.
  45. Mahamud, A.Tropina, Ignition kernel dynamics for a single and dual pulse laser ignition. Texas A&M Conference on Energy,Sept. 25 – 27, 2017, College Station, TX.
  46. Tropina A.A., Miles R.B. Microwave coupling to the flame front: Nonequilibrium effects, Texas A&M Conference on Energy, Sept. 25 – 27, 2017, College Station, TX, p.8.