New defrosting method using jet impingement for precooled turbojet engines

Katsuyoshi Fukiba, Shou Inoue, Hidetoshi Ohkubo, Tetsuya Satou

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    Precooled turbojet engines are effective propulsion systems for hypersonic aircraft. However, a serious problem is that frost forms on the cooling tubes of the precooler, thereby decreasing the engine performance. This paper presents a new method for defrosting the precooler using jet impingement. The validity of the proposed defrosting method was investigated through fundamental experiments. In the experiments, the frost formed on the cooling tubes of the single-row heat exchanger was removed by jet impingement. We used the jet periodically. The jet interval is 10-50 s. In addition, the jet duration is short (about 0.1 s). Therefore, the consumption of the high-pressure air to make the jet flow is small. The coolant temperature and main flow speed influences on the defrosting method effectiveness were assessed. Results show that this defrosting method is effective, especially when the coolant temperature and the main flow speed are low.

    Original languageEnglish
    Pages (from-to)533-542
    Number of pages10
    JournalJournal of Thermophysics and Heat Transfer
    Volume23
    Issue number3
    DOIs
    Publication statusPublished - 2009 Jul

    Fingerprint

    defrosting
    turbojet engines
    jet impingement
    frost
    coolants
    hypersonic aircraft
    tubes
    cooling
    jet flow
    heat exchangers
    propulsion
    low speed
    engines
    intervals
    temperature
    air

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    New defrosting method using jet impingement for precooled turbojet engines. / Fukiba, Katsuyoshi; Inoue, Shou; Ohkubo, Hidetoshi; Satou, Tetsuya.

    In: Journal of Thermophysics and Heat Transfer, Vol. 23, No. 3, 07.2009, p. 533-542.

    Research output: Contribution to journalArticle

    Fukiba, Katsuyoshi ; Inoue, Shou ; Ohkubo, Hidetoshi ; Satou, Tetsuya. / New defrosting method using jet impingement for precooled turbojet engines. In: Journal of Thermophysics and Heat Transfer. 2009 ; Vol. 23, No. 3. pp. 533-542.
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