Weight Analysis of Target Properties in Developing Aviation Comprehensive Surrogate Fuel

In the development of comprehensive surrogate fuel that can simulate the pollution emissions of actual fuels, the weights of the target properties should be determined according to the importance that affects the pollution emissions from spray combustion. Based on the unique advantages of single-component fuel whose basic physical and chemical properties and chemical reaction mechanism can be accurately obtained, the pollution emissions of several single-component fuels, including NOx, CO, and UHC, were measured in the aero-engine combustor. The power-law relationships between fuel atomization particle size, vapor pressure, pollutant generation of gaseous fuel combustion, and the pollution emissions from spray combustion are analyzed based on the response surface methodology. The results show that for CO and NOx emissions from spray combustion, the importance of atomization particle size, vapor pressure, and pollutant generation of gaseous fuel combustion increases in turn. For UHC emissions, the importance of vapor pressure is significantly higher than that of atomization particle size, while pollutant generation of gaseous fuel combustion has little effect on UHC emissions. The weight ratios of target properties are determined by the coefficients of the coded factors of the power-law models.