Megahertz-rate OH planar laser-induced fluorescence imaging in a rotating detonation combustor
Abstract
Megahertz-rate hydroxyl radical planar laser-induced fluorescence (OH-PLIF) was demonstrated in a hydrogen/air rotating detonation combustor for the first time, to the best of our knowledge. A custom injection-seeded optical parametric oscillator (OPO) pumped by the 355 nm output of a high-energy burst-mode laser produced narrowband pulses near 284 nm for OH excitation. The system generated sequences of more than 150 ultraviolet pulses with 400 µJ/pulse at 1 MHz and 150 µJ/pulse at 2 MHz. The order of magnitude improvement in the repetition rate over prior OH-PLIF measurements and in the number of pulses over previous megahertz burst-mode OPOs enables spatiotemporal analysis of complex detonation combustion dynamics.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 12, 2020
- Source ID
- 10.1364/ol.403199
Entities
People
- Austin M. Webb
- Christopher A. Fugger
- Mikhail N Slipchenko
- Naibo Jiang
- Paul Hsu
- Sukesh Roy
- Terrence R Meyer
- Venkat Athmanathan
Organizations
- Air Force Office of Scientific Research
- National Aeronautics and Space Administration