Mixing and Reaction Enhancement Characteristics of Laser-Induced Plasmas and Detonations in Laser-Augmented Scramjets

Journal Article · Tue May 02 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2203257· OSTI ID:20800233

Negishi, Junya; Horisawa, Hideyuki ^[1]; Kimura, Itsuro ^[2]

---

1. Dept. Aeronautics and Astronautics, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa, JAPAN 259-1292 (Japan)
2. University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8856 (Japan)

CFD simulations using a time-dependant Navier-Stokes equation with finite-rate chemistry on effects of a focused laser pulse for combustion and mixing enhancement characteristics were conducted for supersonic premixed hydrogen-air streams. From the results, it was confirmed that, depending on the laser energy density, radicals, a shock wave, and shock-induced local turbulences were being formed through the laser irradiation. Then recirculation zones with flamelets were induced. Moreover it was shown that these flamelets in the recirculation zones were being stabilized in the supersonic stream for a while. Consequently, it was shown that laser-induced plasmas could be effective in both combustion reaction and mixing enhancements for the supersonic combustion.

• OSTI ID: 20800233
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 830; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AIR
COMBUSTION
COMPUTERIZED SIMULATION
ENERGY DENSITY
HYDROGEN
LASER RADIATION
LASERS
NAVIER-STOKES EQUATIONS
PLASMA
PROPULSION
PULSES
SHOCK WAVES
SUPERSONIC FLOW
TURBULENCE
ZONES