This paper presents numerical and experimental investigations of the two-phase underwater ramjet. Unlike giving a fixed initial bubble radius in previous studies, the more advanced numerical model, which can calculate the initial bubble radius on the basis of the flowfield parameters, was developed by considering the process of bubble formation. A scaled-down experimental ramjet engine was tested in a direct-connect ground testing system to characterize the factors influencing the engine performance. The results show that, with the gas/water ratio rising up, the dimensionless thrust was almost linearly increased, and a bubble injector with a smaller orifice diameter was only able to promote the engine performance slightly. The predictions with the present model compare very favorably with experimental results, and the net thrust of the two-phase underwater ramjet can be predicted with an accuracy of less than ± 20 % .


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    Title :

    Experimental and Numerical Parametric Studies on Two-Phase Underwater Ramjet


    Contributors:
    Zhang, Jiarui (author) / Xia, Zhixun (author) / Huang, Liya (author) / Ma, Likun (author)

    Published in:

    Publication date :

    2018-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English







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