Altitude ignition is essential for the design of aero-engines, which is critical to aircraft flight safety. Various factors have been studied to stimulate the success of ignition. However, the study on the ignition at low pressure (less than 1 atm) is rare. At the altitude of 10,000 m, the typical pressure of combustor inlet lowers to 0.26 atm. Such low pressure leads to a significant increase in the ignition delay time (IDT) and may result in flameout and unsuccessful relight. Not only the range of flight envelope is limited, but also it is a hidden danger during flight. This paper is dedicated to investigate an additive to enhance the low-pressure ignition by reducing the IDT of the fuel. Particularly, methoxydiethylborane (MDEB) was chosen as the additive with n-decane as the surrogate fuel. The modified fuel with different concentrations all performed well in a hot surface experiment. The results show that the IDT is decreased from 1235 to 70 ms at 0.9 atm with 20% MDEB even with a lower ignition temperature of 623 K with respect to 923 K. The results on other pressures also validate the efficacy of the MDEB additive for reducing the IDT or even enhance the ignition success. Two kinetic parameters A and B were introduced to explain the reaction mechanism among different conditions. This work shows a novel paradigm to reduce the IDT at low pressure by adjusting the fuel combustion characteristic. Moreover, the IDT with different initial pressures can also be derived by the proposed predictor with boundary condition.


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    Titel :

    Altitude Ignition by Reducing IDT at Low Pressure with Additive


    Weitere Titelangaben:

    Lect. Notes Electrical Eng.


    Beteiligte:
    Jing, Zhongliang (Herausgeber:in) / Chen, Zhijia (Autor:in) / Huang, Xiaobin (Autor:in) / Liu, Hong (Autor:in)

    Kongress:

    International Conference on Aerospace System Science and Engineering ; 2019 ; Toronto, ON, Canada July 30, 2019 - August 01, 2019



    Erscheinungsdatum :

    2020-03-01


    Format / Umfang :

    10 pages





    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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