微重力条件下部分充液贮箱气液界面波动特性的数值模拟
NUMERICAL STUDY ON GAS-LIQUID INTERFACE WAVES IN PARTIALLY FILLED TANKS UNDER MICROGRAVITY CONDITION
查看参考文献33篇
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文摘
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微重力环境中部分充液贮箱内气液界面和气、液两相介质在残余重力或加速度干扰下的运动特征是先进空间流体管理技术的基础.本文针对空间贮箱常用构型和实际尺寸,基于邦德数相似准则设计了3个缩比模型,数值模拟了原型贮箱和缩比模型中加速度变化引起的贮箱内气液两相流动及气液界面上界面波的传播.数值模拟结果验证了原型和模型间的运动相似性,发现在满足邦德数相似准则的前提下,系统还近似满足韦伯数相似准则,或等价地,近似满足弗劳德数相似准则.此外,数值模拟结果也表明原型和模型间的运动存在细微偏差,这主要源于黏性耗散作用的差异.由韦伯数相似准则可知,缩比加大,贮箱尺寸减小,重力突变后由表面张力释放出来的驱动力增强,相同韦伯数下流动速度增大,黏性耗散作用随之增强,本文的数值模拟结果证实了该结论.相关结果可以用于指导空间贮箱流体管理技术的地面模拟试验的方案设计等. |
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其他语种文摘
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The characteristics of liquid-gas interface movement, as well as the distribution and motion of the liquid and gas phases, under the interference of residual gravity or acceleration in partially filled tanks in microgravity are the key fundamental for advanced space fluid management technology. According to the general configuration and size of space propellant tanks, three scale-down models are designed based on the similarity criterion of the Bond number. The gasliquid two-phase flow and the wave propagation along the interface caused by changes in gravity in the prototype tank and scale-down models are numerically simulated. The numerical simulations verify the flow similarity among the prototype tank and the scale-down models. It is found that on the premise of satisfying the similarity criterion of the Bond number, the systems also approximately satisfy the similarity criterion of the Weber number, or equivalently, approximately satisfy the similarity criterion of the Froude number. In addition, the results also show that there exist slight deviations among the prototype tank and the scale-down models, which may be mainly caused by the difference of viscous dissipation. Based on the similarity criterion of the Weber number, with the increase of scale, the size of tank decreases, the driving forcing by the surface tension after the change of gravity strengthens, the flow velocity increases, and thus the viscous dissipation increases at the same Weber number. The numerical results in this paper confirm the above conclusions. The relevant findings can be helpful for the design of ground simulation tests of the liquid management technology of space propellant tanks. |
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来源
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力学学报
,2022,54(4):1004-1011 【核心库】
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DOI
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10.6052/0459-1879-21-645
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关键词
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微重力
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空间流体管理
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界面波
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相似准则
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地址
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中国科学院力学研究所, 中国科学院微重力重点实验室, 北京, 100190
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中国科学院大学工程科学学院, 北京, 100049
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0459-1879 |
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学科
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力学;航天(宇宙航行) |
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基金
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中国科学院前沿科学重点研究计划
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国家自然科学基金
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文献收藏号
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CSCD:7218135
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