Session: 04-25 Atomization and Spray Combustion I
Paper Number: 122860
122860 - Break-Up and Atomization Characteristics of N-Dodecane in High-Temperature Crossflow
The present study numerically investigates the break-up and atomization characteristics of n-dodecane, a widely used surrogate for jet fuels and diesel, under high pressure and temperature conditions of crossflow. This research can provide valuable insight into optimizing fuel injection processes and reducing emissions in gas turbine engines. Simulated test conditions range from 3.8 to 15 bar and at temperatures of 473K, varying the momentum flux ratios (q) in the range of 6-30 and Weber number (We) in the range of 100-2000. An OpenFOAM-based compressible VOF-LPT coupled framework is developed to simulate the high-temperature evaporating spray problem. Numerical validation of the developed framework is done based on the high-temperature experimental data from Amighi and Ashgriz (2019) for water. It is further utilized in simulating n-dodecane injections in a crossflow. The validation is performed regarding liquid jet penetration and droplet sizes, finding accurate agreement with experimental data. The effect of temperature and pressure on break-up and atomization, liquid jet penetration, and droplet size characteristics are also discussed. An increased fine droplet production is observed at high temperatures, potentially due to enhanced break-up and heat transfer rates. Further, the variation of droplet sizes downstream of injection for n-dodecane fuel under different pressure conditions is also discussed. Determination of quantitative droplet size distribution highlights the solver's utility in understanding atomization, evaporation, and mixing under high-temperature crossflow environments.
Presenting Author: Tom Johny Indian Institute of Technology Kanpur
Presenting Author Biography: Mr. Johny is currently pursuing PhD in the Department of Aerospace Engineering at IIT Kanpur. He has obtained his Masters from IIT Kanpur, India. His primary research interest lies in CFD & Atomization of Sprays.
Authors:
Tom Johny Indian Institute of Technology KanpurBharat Batia Eindhoven University of Technology
Ashoke De Indian Institute of Technology Kanpur
Break-Up and Atomization Characteristics of N-Dodecane in High-Temperature Crossflow
Paper Type
Technical Paper Publication