论文部分内容阅读
已经完成的试验是用低值加速度的方法研究人马座液氢貯箱相似模型中的液体从箱体一端重新定位到另一端的过程。重定位前,以Bond数15将液体稳定在箱体顶端。研究中使用5.5厘米和7.0厘米半径的箱体,分有和没有环形档板两种情况。改变重定位加速度值以获得Bond数200和450。箱体内充满20%和70%的液体。液体沿箱壁流动最初为层流。在全部无档板箱体的试验中,开始重定位后,液体回跳(rebound)或者说形成喷泉(geyser)返回箱顶。从重定位开始到喷泉流碰撞箱顶的时间同予示的时间比较一致。安放环向档板后极大地改变了重定位流的流型,但是对于从箱顶清除液体的时间和聚集(collect)液体的时间与无档板的试验结果仅有很小的差别。
The experiment that has been done is to investigate the process of relocating liquid from one end of the tank to the other using a low-value acceleration method in a similar model of the Sagittal liquid hydrogen tank. Before relocating, stabilize the liquid at the top of the box with a Bond number of 15. The study used 5.5 cm and 7.0 cm radius of the box, with and without annular baffle two cases. Change the repositioning acceleration value to get Bond numbers 200 and 450. Box filled with 20% and 70% of the liquid. Liquid flows along the walls of the tank initially for laminar flow. In all the tests without a bracing box, after the relocation was started, the liquid rebounded or formed a geyser back to the top of the box. The time from the beginning of the relocation to the time when the fountain flow crashed into the top of the box coincides with the time shown. Placement of the baffles greatly changed the flow pattern of the repositioned flow but there was only a slight difference between the time it took to clear the liquid from the top of the tank and the time to collect liquid versus the test without baffles.