4 papers
High-Speed Thermal Imaging of Disk-shaped Firebrands in a Wind Tunnel
Charles Callahan, Erick Gatica, Sean Coburn +6
The transport and temperature-time history of disk-shaped firebrands was studied with high-speed thermal imaging in a wind tunnel. One millimeter diameter wooden disks were ignited…
Temperature, Pressure, Velocity, and Water Vapor Mole Fraction Profiles in a Ramjet Combustor using Dual Frequency Comb Spectroscopy and a High Temperature Absorption Database
David Yun, Scott C. Egbert, Nathan A. Malarich +9
Accurate diagnostics of the combustor region of ramjet engines can improve engine design and create benchmarks for computational fluid dynamics models. Previous works demonstrate t…
Single-Beam Velocimetry with Dual Frequency Comb Absorption Spectroscopy
David Yun, Scott C. Egbert, Augustine T. Frymire +5
Laser absorption Doppler velocimeters use a crossed-beam configuration to cancel error due to laser frequency drift and absorption model uncertainty. This configuration complicates…
Water-Vapor Absorption Database using Dual Comb Spectroscopy from 300-1300 K Part II: Air-Broadened HO, 6600 to 7650 cm
Scott C. Egbert, Keeyoon Sung, Sean C. Coburn +2
We present broadband dual frequency comb laser absorption measurements of 2% HO (natural isotopic abundance of 99.7% HO) in air from 6600-7650 cm (1307-1515 nm)…