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Characteristics of spherical shock wave and circular pulse jet generated by discharge of propagating shock wave at open end of tube

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Abstract

When the shock wave propagating in the straight circular tube reaches at the open end, the impulsive wave is generated by the emission of a shock wave from an open end, and unsteady pulse jet is formed near the open end behind the impulsive wave under the specific condition. The pulse jet transits to spherical shock wave with the increase in the strength of shock wave. The strength is dependent on the Mach number of shock wave, which attenuates by propagation distance from the open end. In this study, the mechanism of generating the unsteady pulse jet, the characteristics of the pressure distribution in the flow field and the emission of shock wave from straight circular tube which has the infinite flange at open end are analyzed numerically by the TVD method. Strength of spherical shock wave, relation of shock wave Mach number, distance decay of spherical shock wave and directional characteristics are clarified.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Kitakyushu National College of Technology, Shii, Kokuraminami-ku, 802-0985, Kitakyushu, Japan

    Tsukasa Irie

  2. Department of Control and Information Systems Engineering, Kitakyushu National College of Technology, Shii, Kokuraminami-ku, 802-0985, Kitakyushu, Japan

    Tsuyoshi Yasunobu & Hideo Kashimura

  3. Department of Mechanical Engineering, Saga University, Honjo, 840-8502, Saga, Japan

    Toshiaki Setoguchi

  4. Department of Mechanical Systems and Environmental Engineering, Univ. of Kitakyushu, 1-1, Hibikino, Wakamatsu-ku, 808-0135, Kitakyushu, Japan

    Kazuyasu Matsuo

Authors
  1. Tsukasa Irie
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  2. Tsuyoshi Yasunobu
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  3. Hideo Kashimura
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  4. Toshiaki Setoguchi
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  5. Kazuyasu Matsuo
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Irie, T., Yasunobu, T., Kashimura, H. et al. Characteristics of spherical shock wave and circular pulse jet generated by discharge of propagating shock wave at open end of tube. J. of Therm. Sci. 12, 245–249 (2003). https://doi.org/10.1007/s11630-003-0076-y

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  • DOI: https://doi.org/10.1007/s11630-003-0076-y

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