Framing Camera Time-resolved Laser Induced Incandescence Measurements in a Rich Quench Lean Combustor

Details

• Creators:
  Douglas, Eric J. ; Vishwanath, Rahul ; Dhayal, Harshit ; Steinberg, Adam ; Sun, Wenting ; Mazumdar, Yi Chen
• Corporate Creators:
  United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment ; Georgia Institute of Technology
• Corporate Contributors:
  United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy
• Subject/TRT Terms:
  ASCENT Aviation Fuels Combustion High Pressure Combustion Laser Induced Incandescence (LII) Lean Fuel Mixtures Particles Rich Quench Lean Soot Particle Sizing
• Publication/ Report Number:
  FramingCameraTiReLII_ESSCI2026
• Resource Type:
  Proceedings
• Right Statement:
  Public Domain
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment
• Abstract:
  Determining the size of soot particles in dynamic turbulent flames is critical for optimizing injector and combustor designs. In this work, we demonstrate the first use of a gigahertz-rate framing camera for planar time-resolved laser-induced incandescence (TiRe-LII) measurements in a rich quench lean (RQL) combustion system with Jet A fuel. In this method, the framing camera is able to capture the background luminosity, prompt LII signal, and temporal incandescence decay at up to 40 MHz. This enables shorter time constant fits than any prior 2D TiRe-LII experiments, enhancing confidence in soot particle size and soot volume fraction estimates. Measurements are performed at a preheat temperature of 600 K, pressures ranging from 59 to 120 psig, and equivalence ratios from 0.26 to 0.29. Initial results show clear soot volume fraction and particle size changes with pressure and equivalence ratio.
• Content Notes:
  Citation: Douglas, E. J., Vishwanath, R., Dhayal, H., Steinberg, A., Sun, W., & Mazumdar, Y. C. (2026). Framing Camera Time-resolved Laser Induced Incandescence Measurements in a Rich Quench Lean Combustor. Spring Technical Meeting, Eastern States Section of the Combustion Institute, March 15-18, 2026, Raleigh, NC
• Format:
  PDF
• Funding:
  13-C-AJFE-GIT-080
• Collection(s):
  Federal Aviation Administration
• Main Document Checksum:
  urn:sha-512:f696c31e889e3553fda013890d8be766c1a2aefb508d81c46902422de9464dc37f97e108051db22d28a6f4505eb4512d85837420ba12bfdf1500270ad761e9ef
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/92354/dot_92354_DS1.pdf
• File Type:
  [PDF - 3.23 MB ]