两相控温型储液器进出流量的瞬态数值模拟

孟庆亮; 张焕冬; 赵振明; 赵石磊; 杨涛

doi:10.13700/j.bh.1001-5965.2019.0094

两相控温型储液器进出流量的瞬态数值模拟

doi: 10.13700/j.bh.1001-5965.2019.0094

孟庆亮^{1, 2, ,},
张焕冬^{1, 2},
赵振明^{1, 2},
赵石磊^{1, 2},
杨涛^{1, 2}

1.
北京空间机电研究所, 北京 100094
2.
先进光学遥感技术北京市重点实验室, 北京 100094

基金项目:

国家自然科学基金 51806010

详细信息

作者简介:
孟庆亮男, 博士。主要研究方向:微重力下两相流动与传热

赵振明男, 博士。主要研究方向:遥感器热设计、两相流换热

通讯作者:
孟庆亮.E-mail:qlmeng@mail.ustc.edu.cn

中图分类号: V416;TK124
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- 被引次数: 0
出版历程
- 收稿日期: 2019-03-12
- 录用日期: 2019-04-21
- 网络出版日期: 2019-11-20

Transient numerical simulations of flow rate into and out of two-phase temperature control accumulator

MENG Qingliang^{1, 2
, ,},
ZHANG Huandong^{1, 2},
ZHAO Zhenming^{1, 2},
ZHAO Shilei^{1, 2},
YANG Tao^{1, 2}

1.
Beijing Institute of Space Mechanics and Electricity, Beijing 100094, China
2.
Beijing Key Laboratory of Advanced Optical Remote Sensing Technology, Beijing 100094, China

Funds:

National Natural Science Foundation of China 51806010

More Information

Corresponding author: MENG Qingliang.E-mail: qlmeng@mail.ustc.edu.cn

摘要

摘要:
两相控温型储液器是泵驱两相流体回路（MPTL）系统中的一个重要部件，承担着工质存储、供给、气液分离及精密控温的作用。采用Navier-Stokes方程建立了MPTL系统瞬态模拟的仿真模型，可用于研究热源功率变化时储液器与主回路的动态传热和传质特性。通过仿真与试验对比发现，数值模型的流量误差在±10%以内，验证了模型的有效性和准确度。数值模拟结果表明：热源开关机时，储液器与主回路发生工质交换，气液两相的温度和压力受到影响，系统的流阻也受到影响；随着热源功率的增加，工质交换速率和交换总量随之增加，储液器内气液两相的温度和压力变化趋势随之增大。该模型可用于研究不同工作条件下的流量、温度和干度的变化特性，指导MPTL设计，并在系统搭建前预测系统特性。
- 泵驱两相流体回路(MPTL) /
- 两相控温型储液器 /
- 精密控温 /
- 传热传质 /
- 数值模拟
Abstract:
Two-phase temperature control accumulator (hereinafter referred to as accumulator) is the key component of mechanically pumped two-phase loop (MPTL) system, which acts like the brain of MPTL system. The accumulator has the functions of storage and supplying of working fluid, gas-liquid separation and precise temperature controlling. In order to study the dynamic behavior of heat and mass transfer between accumulator and MPTL system in response to heat load variations, a transient numerical simulation model is developed for MPTL system by using the Navier-Stokes equations. By comparison between simulation and test results, it is found that the flow rate error of numerical model is in the range of ±10%, which verifies the validity and accuracy of the model. The simulation results show that accumulator will exchange fluid with the main loop in response to heat load variations. In this case, the temperature and pressure of two-phase fluid in accumulator, and the total system flow resistance will be affected. The rate and amount of mass transfer between accumulator and main loop will increase with the increase of heat power, and the same increase will occur for the variation trend of temperature and pressure of two-phase fluid in the accumulator. The model can be used to study the variation characteristics of flow rate, temperature, and quality under different operating conditions, which can also be used to design MPTL system and to predict the system characteristics before a system has been built.
- mechanically pumped two-phase loop (MPTL) /
- two-phase temperature control accumulator /
- precise thermal control /
- heat and mass transfer /
- numerical simulation

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图 1 MPTL系统组成示意图

Figure 1. Schematic of MPTL system composition

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图 2 两相控温型储液器示意图

Figure 2. Schematic of two-phase temperature control accumulator

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图 3 主回路网格划分示意图

Figure 3. Schematic of mesh generation for main loop

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图 4 储液器与主回路耦合处网格划分示意图

Figure 4. Schematic of mesh generation for coupling between accumulator and main loop

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图 5 MPTL系统实物图

Figure 5. Photo of MPTL system

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图 6 储液器与主回路工质交换流量仿真与试验结果对比

Figure 6. Comparison between simulation and test results of mass flow rate exchange between accumulator and main loop

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图 7 热源开机时储液器内气液两相温度和压力随时间的变化曲线

Figure 7. Temporal evolution of temperature and pressure of two-phase fluid in accumulator in response to heat load increase

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图 8 热源关机时储液器内气液两相温度和压力随时间的变化曲线

Figure 8. Temporal evolution of temperature and pressure of two-phase fluid in accumulator in response to heat load decrease

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图 9 系统流量随距离变化趋势

Figure 9. Profile of system flow rate along flow distance

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图 10 系统流阻随时间的变化趋势

Figure 10. Temporal evolution of system flow resistance

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图 11 冷板内流体温度和干度变化曲线

Figure 11. Temporal evolution of temperature and quality of working fluid in cold plates

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图 12 不同功率下储液器进出流量随时间的变化趋势

Figure 12. Temporal evolution of flow rate into and out of accumulator under different powers

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图 13 不同功率下储液器气液温度和压力的变化曲线

Figure 13. Temporal evolution of temperature and pressure of gas and liquid phase in accumulator under different powers

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表 1 模型与试验参数

Table 1. Parameters of model and test

组件	描述
机械泵	流量：1 g/s
储液器	体积：200 mL；控温温度：(20±0.3)℃；加热功率：10 W
预热器	材料：不锈钢；加热功率：50 W；数量：2个
冷板	材料：不锈钢；数量：4个
冷凝器	温度：(10±0.5)℃
管路	材料：不锈钢；外径：0.003 m；内径：0.002 m

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