Model construction and validation of aviation kerosene bio-alternative fuel based on multi-objective optimization

doi:10.11949/0438-1157.20250477

Abstract

Abstract:

Energy shortage and environmental pollution are particularly prominent problems in the aviation industry. Biofuels, as an emerging energy source, have the potential to directly replace traditional petroleum fuels. Based on the genetic algorithm, a multi-objective optimization of the proportion of RP-3 alternative fuel components was carried out using physical parameters such as density, kinematic viscosity, low level calorific value, hydrogen to carbon ratio and molecular weight as the selection criteria. The accuracy of the model was verified under atmospheric and critical pressure conditions. It is shown that the optimal alternative fuel consists of 32.78% n-butyl ether, 14.64% 2-methylfuran, and 52.58% second-generation biodiesel. The overall error in physical and chemical properties is within 3%. The model demonstrates high reliability of key physical properties under a wide range of environmental conditions. In addition, the chemical substitutability was verified by constructing a semi-detailed reaction mechanism for bioalternative fuels containing 192 components and 1482 radical reactions. The results showed that the model's ignition delay time was in good agreement with the experimental values, which is of great significance for the optimal design of biofuels.

Key words: genetic algorithm, RP-3 aviation paraffin, biofuel, optimized design, physicochemical properties, ignition delay time

摘要：

能源短缺与环境污染是航空业尤为突出的问题，而生物燃料作为一种新兴能源，具有直接替代传统石油燃料的潜力。基于遗传算法，以密度、运动黏度、低位热值、氢碳比及分子量等物性参数为遴选指标对RP-3替代燃料组分比例进行多目标优化，并在常压、临界压力条件下对模型的准确性进行验证。研究表明，最佳替代燃料由32.78%的正丁醚、14.64%的2-甲基呋喃以及52.58%的二代生物柴油组成，理化特性误差整体在3%以内，且在广泛的环境条件下，该模型具备较高的主要物理性质可靠性。另外，利用构建包含192个组分和1482个基元反应的生物替代燃料半详细反应机理验证了其化学性质替代性，结果表明该模型着火延迟时间与实验值良好吻合，对生物燃料优化设计具有指导意义。

关键词: 遗传算法, RP-3航空煤油, 生物燃料, 优化设计, 理化特性, 着火延迟时间

CLC Number:

V 312⁺.3

Linlin GU, Chongyang LIU, Zhongqing YANG, Dong JIANG, Dongdong QI, Jingyu RAN. Model construction and validation of aviation kerosene bio-alternative fuel based on multi-objective optimization[J]. CIESC Journal, 2025, 76(11): 5720-5729.

顾林林, 刘重阳, 杨仲卿, 姜东, 齐东东, 冉景煜. 基于多目标优化的航空煤油生物替代燃料模型构建及验证[J]. 化工学报, 2025, 76(11): 5720-5729.

Figures/Tables 8

Table 1 RP-3 physical properties of aviation kerosene and its characterisation components

种类	密度/（kg/m³）	运动黏度/（mm²/s）	氢碳比	低热值/（MJ/kg）	平均分子量
RP-3	799	1.55	2.03	43.75	148
正丁醚	763	0.834	2.25	37.9	130
2-甲基呋喃	917	0.546	1.2	30.4	82
二代生物柴油	792	3.29	2.12	46.2	240

Fig.1 Optimisation function values for the best individual

Table 2 Comparison of physical parameters and errors between aviation kerosene and alternative fuels

种类	密度/（kg/m³）	运动黏度/（mm²/s）	氢碳比	低热值/（MJ/kg）	平均分子量
RP-3	799	1.55	2.03	43.75	148
替代燃料	800	1.549	2.015	40.60	151
误差/%	0.22	0.02	0.76	6.38	2.17

Fig.2 Evolution of the density(a) and kinematic viscosity(b) of each fuel with temperature under atmospheric conditions

Fig.3 Evolution of the density of each fuel with temperature under supercritical pressure conditions

Fig.4 Evolution of kinematic viscosity with temperature for each fuel under supercritical pressure conditions

Fig.5 Numerical simulation and experimental validation of ignition delay time of bioalternative fuels under high pressure condition (P=1.0 MPa)

Fig.6 Numerical simulation and experimental validation of ignition delay time of bio-alternative fuels under atmospheric pressure condition P=0.1 MPa(a) and low-pressure conditions P=0.01 MPa(b)

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