Spray and Soot Characteristics of Liquid Spray Flames in a High-Pressure Sector Combustor

Details

• Creators:
  Vishwanath, Rahul ; Olimid, Dominic ; Douglas, Eric ; Bibik, Oleksandr ; Wehe, Shawn ; Mazumdar, Yi Chen ; Steinberg, Adam ; Sun, Wenting
• 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 Chemical Dispersions Chemical Sprays Doppler Effect Flammability Laser Induced Incandescence Lasers Phase Doppler Anemometry Soot In High Pressure Jet-A Flames Spray Atomization Swirl-stabilized Jet-A/SAF Flames

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• Publication/ Report Number:
  1C09-110490475
• Resource Type:
  Proceedings
• Right Statement:
  Open Access; https://creativecommons.org/licenses/by/4.0/
• Geographical Coverage:
  United States
• Corporate Publisher:
  Eastern States Section of the Combustion Institute
• Abstract:
  Conventional aviation combustors use liquid fuels where spray atomization is important for efficient combustion process and resultant emissions. In this study, a three-sector combustor with commercial pre-filming air blast injectors is utilized to analyze the effect of operating conditions on spray and soot formation. Measurements are performed with both Jet-A and sustainable aviation fuel (SAF) at different operating pressures, preheat temperatures and global equivalence ratios. Phase Doppler particle anemometry is utilized to measure instantaneous drop-sizes in both non-reacting and reacting conditions. Instantaneous soot particle temperature and soot volume fraction distributions were measured in the primary zone of the combustor using two-color planar auto-compensating laser induced incandescence for both Jet-A and SAF flames. The drop-sizes shifted towards larger diameters for reacting conditions compared to non-reacting flow, possibly indicating the complete evaporation of smaller droplets at a given operating condition. In comparison to Jet-A, SAF fuel spray produced slightly smaller droplets owing to its reduced surface tension and higher vapor pressure values. The maximum averaged SVF were observed to be along the main reaction zone with values around 5 ppm for Jet-A flames at the operated conditions. For the SAF flames at the same conditions, the averaged SVF reduced by almost 2-3 times compared to Jet-A flames.
• Format:
  PDF
• Funding:
  13-C-AJFE-GIT-080
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:36baacfbe54f3f4ee92ad2f9410c15b79aa61243a96ca6a666e8e165a34f76f27d7020acb08ba7b45247f5d7f56ab9bbf79b027792edfe839b4d0f7bfa535c57
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/89726/dot_89726_DS1.pdf
• File Type:
  [PDF - 2.42 MB ]