On the Construction of a Trans-media Water-entry Test System for Projectile
To comprehensively carry out the trans-media water entry test of projectile under the mutual coupling of different motion peculiarities and various operating environment properties,a multifunctional trans-media water-entry test system is built.The test system includes a launch subsystem,a parameter measurement subsystem,and a medium property subsystem.The launch subsystem is mainly used for the trans-media water entry test of projectile under the mutual coupling of multiple factors,and is checked via numerical simulation.The results indicate that the launch subsystem is safe and reliablem,and could be used to perform tests normally.The parameter measurement subsystem is used to qualitatively observe the temporal and spatial evolution of cavitation bubbles during the trans-media water entry process of projectile via a high-speed camera and quantitatively measure the real-time change of acceleration by a acceleration sensor.The medium property subsystem is used to build an operating environment with different viscosities and densities.Overall variations of bubbles and accelerations obtained from tests indicate that the test system could be fully employed to perform trans-media water entry test for the projectile.
projectiletrans-media water entrylaunch subsystemparameter measurement subsystemmedium property subsystem
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