内角钝度对微重力下液体推进剂毛细流动特性的影响

doi:10.16183/j.cnki.jsjtu.2021.504

上海交通大学学报 ›› 2023, Vol. 57 ›› Issue (6): 739-746.doi: 10.16183/j.cnki.jsjtu.2021.504

所属专题：《上海交通大学学报》2023年“航空航天”专题

内角钝度对微重力下液体推进剂毛细流动特性的影响

杨恩博¹, 金宇鹏¹, 杨光¹(), 黄永华¹, 王天祥², 雷刚², 吴静怡¹

1.上海交通大学机械与动力工程学院,上海 200240
2.航天低温推进剂技术国家重点实验室,北京 100028

收稿日期:2021-12-10 修回日期:2022-01-19 接受日期:2022-02-07 出版日期:2023-06-28 发布日期:2023-07-05
通讯作者: 杨光 E-mail:y_g@sjtu.edu.cn.
作者简介:杨恩博(2001-),本科生,现从事微重力流体力学研究.
基金资助:
国家自然科学基金重点项目(51936006);航天低温推进剂技术国家重点实验室开放课题资助项目(SKLTSCP202005)

Effect of Corner Roundedness on Capillary Flow of Liquid Propellants in Microgravity

YANG Enbo¹, JIN Yupeng¹, YANG Guang¹(), HUANG Yonghua¹, WANG Tianxiang², LEI Gang², WU Jingyi¹

1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 100028, China

Received:2021-12-10 Revised:2022-01-19 Accepted:2022-02-07 Online:2023-06-28 Published:2023-07-05
Contact: YANG Guang E-mail:y_g@sjtu.edu.cn.

摘要/Abstract

摘要：

表面张力驱动下的内角流动理论为空间液体管理装置的设计提供重要支撑,其动态流动过程中的液体流量、流速、液面位置等参数是决定液体管理性能的关键因素.在实际应用中,受到加工条件的限制或为了提高机械承载能力,内角尖端通常存在一定的钝度.采用理论分析与实验验证相结合的方法,定量分析了钝度对内角流动特性的影响规律.结果表明,在钝度一定的条件下,液面运动距离与时间的1/2次方始终保持近似正比关系,且钝度越大毛细流动的速度越低.通过基于磁补偿原理的微重力模拟流动实验,初步验证理论模型的正确性.并将理论模型应用于以液氢和液氧为代表的低温推进剂的表面张力输运过程,发现不同条件下的流量变化规律,为低温推进剂表面张力式液体管理装置的设计提供重要基础数据.

关键词: 表面张力, 内角, 毛细驱动流, 钝度, 磁补偿, 低温推进剂

Abstract:

The theory of interior corner flow driven by surface tension provides an important support for design of liquid management devices in space. The flow rate, velocity, and liquid position are important factors to determine liquid management efficiency. In practice, due to machining precision or aiming to enhance the mechanical strength, the interior corner is often imperfect with a certain degree of roundedness. In this paper, the influence of corner roundedness on liquid flow characteristics is quantitatively analyzed by combining theoretical and experimental analysis. The results show that with a fixed corner roundedness, the height of liquid is always proportional to the square root of time. The velocity of capillary flow also decreases with the increase of corner roundedness. The present theoretical model is validated by the microgravity experiments based on magnetic compensation. Furthermore, the model is applied to simulate the capillary flow of liquid hydrogen and liquid oxygen. The variations of flow rate under different conditions are obtained, which provides important basic data for the design of liquid management devices for cryogenic propellant.

Key words: surface tension, interior corners, capillary driven flow, roundedness, magnetic compensation, cryogenic propellant

中图分类号:

V511.6

杨恩博, 金宇鹏, 杨光, 黄永华, 王天祥, 雷刚, 吴静怡. 内角钝度对微重力下液体推进剂毛细流动特性的影响[J]. 上海交通大学学报, 2023, 57(6): 739-746.

YANG Enbo, JIN Yupeng, YANG Guang, HUANG Yonghua, WANG Tianxiang, LEI Gang, WU Jingyi. Effect of Corner Roundedness on Capillary Flow of Liquid Propellants in Microgravity[J]. Journal of Shanghai Jiao Tong University, 2023, 57(6): 739-746.

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参考文献 22

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流体	温度/K	ρ/(kg·m^-3)	μ/(μPa·s)	σ/(mN·m)
液氢	20	70.85	13.92	2.001
液氧	90	1 141	195.64	13.198

内角钝度对微重力下液体推进剂毛细流动特性的影响

Effect of Corner Roundedness on Capillary Flow of Liquid Propellants in Microgravity

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