细长体水下运动空化流场及弹道特性实验

发布时间：2018-02-24 11:15

本文关键词： 多相流汽化湍流细长体空泡　出处：《爆炸与冲击》2017年03期 　论文类型：期刊论文

【摘要】：为了研究细长体水下高速运动时空泡的产生、闭合及脱落特性,及影响细长体空泡形态及弹道特性的复杂因素等,初步开展了细长体模型水下高速运动的实验研究,分析了不同初始空化数下细长体模型在水中高速运动的一系列流动现象,重点研究了空泡的发展、闭合、尾部回射流和尾部脱落特性,以及轴对称细长体模型弹道特性与空泡形态变化之间的关系和转动特性随时间的变化历程等。结果表明:细长体水下高速运动时形成超空泡,空泡头部光滑透明,尾部凝结有汽水混合物且有交替脱落的含气漩涡;初始空化数对细长体的速度衰减有所影响;受初始扰动影响,细长体水下运动伴随有绕头部的转动且初始扰动影响细长体俯仰角随时间的变化历程。
[Abstract]:In order to study the formation, closure and shedding characteristics of the space-time bubbles in the slender body, and the complex factors affecting the cavitation morphology and ballistic characteristics of the slender body, a preliminary experimental study on the high-speed underwater motion of the slender body model was carried out. In this paper, a series of flow phenomena of slender body model with different initial cavitation numbers in water are analyzed, and the characteristics of cavitation development, closure, tail return jet and tail shedding are studied. The relationship between ballistic characteristics and cavitation morphology of axisymmetric slender body model and the course of rotation characteristics with time are also discussed. The results show that supercavitation is formed when slender body moves at high speed underwater, and the head of cavitation is smooth and transparent. The tail condensed with a steam and water mixture with alternating shedding of the gas-bearing vortex; the initial cavitation number has an effect on the velocity decay of the slender body; affected by the initial disturbance, The underwater motion of the slender body is accompanied by the rotation of the head and the initial disturbance affects the variation of the pitch angle of the slender body with time.
【作者单位】：哈尔滨工业大学航天学院;
【基金】：中央高校基本科研业务费专项基金项目(HIT.NSRIF.201159)
【分类号】：O35

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