Combustion phenomenon, performance and emissions of a diesel engine with aviation turbine JP-8 fuel and rapeseed biodiesel blends

The autoignition delay and maximum heat release rate decreased, maximum cylinder pressure, and pressure gradients increased, whereas brake specific fuel consumption changed little and brake thermal efficiency was 1.0-3.6% higher when running with fuel blends J5 to J30 at rated speed compared with the data measured with neat jet fuel. The NOx emissions increased slightly, but the CO, THC emissions, and smoke opacity boosted up significantly when using jet fuel blend J10 with a smooth reduction of unburned hydrocarbons for jet-biodiesel fuel blends with higher CN ratings. Operation at a full (100%) load with fuel blend J10 produced more CO and exhaust smoke, whereas the combustion of identical fuel blend B10 showed the reverse trends reducing both pollutants at both engine speeds.