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Formulation of a Jet Fuel Surrogate and Its Kinetic Chemical Mechanism by Emulating Physical and Chemical Properties of Real Jet Fuel

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  • Guangze Li

    (School of Energy and Power Engineering, Beihang University, Beijing 100191, China
    Beihang Hangzhou Innovation Institute Yuhang, Hangzhou 310023, China
    Zhongfa Aviation Institute of Beihang University, Hangzhou 311115, China)

  • Boxuan Cui

    (School of Energy and Power Engineering, Beihang University, Beijing 100191, China)

  • Chenglin Zhang

    (Zhongfa Aviation Institute of Beihang University, Hangzhou 311115, China)

  • Liuyong Chang

    (School of Energy and Power Engineering, Beihang University, Beijing 100191, China
    Beihang Hangzhou Innovation Institute Yuhang, Hangzhou 310023, China
    Zhongfa Aviation Institute of Beihang University, Hangzhou 311115, China)

  • Longfei Chen

    (School of Energy and Power Engineering, Beihang University, Beijing 100191, China)

Abstract

The application of jet fuel in gas turbines and diesel engines adheres to the Army’s single-fuel forward policy, streamlining supply chains. To ensure precise engine combustion numerical studies, surrogate fuels and mechanisms should faithfully replicate real fuel properties and combustion traits. In this work, a new four-component jet fuel surrogate containing 39.05% n-dodecane/21.79% isocetane/11.49% decalin/27.67% toluene by mole fraction is formulated based on a property optimizer. The new-formulated fuel surrogate can satisfactorily emulate the chemical and physical properties of real jet fuel, including cetane number (CN), threshold sooting index (TSI), molecular weight (MW), lower heating value (LHV), the ratio of hydrogen and carbon (H/C), liquid density, viscosity, and surface tension. Furthermore, a reduced and robust kinetic chemical mechanism (containing 124 species and 590 reactions) that could be directly employed in practical engine combustion simulations has also been developed for the proposed surrogate jet fuel. The mechanism is validated through comprehensive experimental data, including ignition delay time (IDT) determined in shock tubes and rapid compression machines (RCMs), species mole fractions measured in premixed flames and jet stirred reactors (JSRs), and laminar flame speeds. Generally, the property deviations of the jet fuel surrogate are less than 2% except for MW (10.73%), viscosity (5.88%), and surface tension (8.71%). The comparison results between the predictions and measurements are in good agreement, indicating that the current kinetic mechanism is capable of reflecting the oxidation process of real jet fuel. The current mechanism can accurately capture variations in the ignition delay time in the negative temperature coefficient (NTC) region as well. In the future, the proposed surrogate jet fuel could be applied in practical engine computational fluid dynamic (CFD) simulations.

Suggested Citation

  • Guangze Li & Boxuan Cui & Chenglin Zhang & Liuyong Chang & Longfei Chen, 2023. "Formulation of a Jet Fuel Surrogate and Its Kinetic Chemical Mechanism by Emulating Physical and Chemical Properties of Real Jet Fuel," Sustainability, MDPI, vol. 15(18), pages 1-26, September.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:18:p:13792-:d:1240910
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    References listed on IDEAS

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    1. Wang, Libing & Wu, Zengyang & Ahmed, Ahfaz & Badra, Jihad A. & Sarathy, S. Mani & Roberts, William L. & Fang, Tiegang, 2019. "Auto-ignition of direct injection spray of light naphtha, primary reference fuels, gasoline and gasoline surrogate," Energy, Elsevier, vol. 170(C), pages 375-390.
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