微重力环境下半球形贮箱液体重定位试验研究

本文利用落塔形成的微重力环境,对半球形贮箱中液体重定位问题进行了试验研究。所用液体与半球形箱壁之间的接触角为零并在加载前形成了失重初始凹液面.本试验分侧向不加干扰及加干扰两种初始条件.通过高速摄影机观察了液体重定位的全过程并测量了重定位流速和重定位时间。试验结果表明,液体重定位呈壁流流型.实测重定位时间与理论估算值一致.

EXPERIMENTAL INVESTIGATION OF LIQUID REORIENTATION IN SEMISPHERES UNDER MICROGRAVITY CONDITIONS

An experimental investigation of liquid reorientation in semispherical container by means of microgravity accelerations is conducted in a drop tower. The liquid used has zero-degree-static-contact angles on the semispherical container and is exposed to an initially concave interface in a zero-g environment before thrust. The study is conducted at two initialconditions, with and without an initial pulse. Liquid reorientation is observed by means of a high-speed camera. Reorientation flow velocity and time are measured. The results of this study indicate that liquid reorientate along the container wall and the reorientation time measured is consistent with theoretical estimation.