AbstractThe pintle injector is famous for its capability of deep throttling and low cost. However, the pintle injector has been seldom investigated. To get a good prediction of the spray angle of liquid-liquid pintle injectors, theoretical analysis, numerical simulations and experiments were conducted. Under the hypothesis of incompressible and inviscid flow, a spray angle formula was deduced from the continuity and momentum equations based on a control volume analysis. The formula was then validated by numerical and experimental data. The results indicates that both geometric and injection parameters affect the total momentum ratio (TMR) and then influence the spray angle formed by liquid-liquid pintle injectors. TMR is the pivotal non-dimensional number that dominates the spray angle. Compared with gas-gas pintle injectors, spray angle formed by liquid-liquid injectors is larger, which benefits from the local high pressure zone near the pintle wall caused by the impingement of radial and axial sheets.

    HighlightsA prediction model of spray angle for pintle injector is established and validated.TMR is the pivotal non-dimensional number dominates the spray angle.The difference between liquid-liquid and gas-gas pintle injectors is highlighted.


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    Title :

    On the prediction of spray angle of liquid-liquid pintle injectors


    Contributors:
    Cheng, Peng (author) / Li, Qinglian (author) / Xu, Shun (author) / Kang, Zhongtao (author)

    Published in:

    Acta Astronautica ; 138 ; 145-151


    Publication date :

    2017-05-29


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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