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  • Observation of jets in conical shaped charges

    Paper number

    IAC-10,A6,3,11,x7708

    Author

    Dr. Shin-ichi Takeda, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Dr. Masumi Higashide, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Dr. Yosuke Nagao, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Mr. Hiroki Koinuma, Mitsubishi Heavy Industries, Ltd., Japan

    Coauthor

    Dr. Seishiro Kibe, Japan Aerospace Exploration Agency (JAXA), Japan

    Year

    2010

    Abstract
    In order to assess the protection of orbital space debris impacts on the spacecraft, a series of hyper-velocity impact tests have been conducted by using conical shaped charge (CSC) equipment. Since no experimental methods can accelerate a projectile with a gram-order mass and above 10 km/s velocity in the laboratory on the ground, the CSC employing the inhibitor is the most effective method to simulate experimentally the orbital space debris impact against the spacecraft in the low earth orbit (LEO). The jets generated by the CSC easily penetrate into typical target, thin AL alloy bumper. One remaining problems about the CSC is difference in the bumper fractures from actual debris collision. Though the debris caused one circular hole in the bumper, the CSC resulted in turning bumper outward. Observation of the jets is needed for future improvement of the CSC and test configuration.
    
    In this study, the test configurations were changed in order to investigate the influence of blast on the bumper fracture. The jets in the CSC were also observed by a high-speed camera experimentally. These results showed that the blast did not affect the bumper fracture, and the bumper turned outward when the following jets reached to the bumper. This phenomenon was confirmed by the measurement of strain gauge and the analysis using Eulerian method.
    Abstract document

    IAC-10,A6,3,11,x7708.brief.pdf

    Manuscript document

    (absent)