Combustion performance optimization of compression ignition engine using RP-3 aviation kerosene with split injection

Numerical simulation of turbulent combustion in a compression ignition engine was carried out for a simplified mechanism of RP-3 aviation kerosene containing 92 species and 332 reactions． The effect of the split injection strategy on the combustion performance of diesel engines fuelled with RP-3 aviation kerosene was investigated，and the best injection quality fraction and timing were obtained．Results show that the in-cylinder pressure of the RP-3 with 5% pilot-injection quality fraction was consistent with that of diesel with 2% pilot-injection quality fraction．Later main injection timing would lead to shorter fuel-air mixing time and worse combustion quality．The injection strategy of pre injection/main injection quality fraction of 10%/90% and pre injection/main injection time of -12 ℃ A ATDC/0.5 ℃ A ATDC (after top dead center) could enable RP-3 to achieve better combustion performance on this type of diesel engine. © 2023 Huazhong University of Science and Technology. All rights reserved.