高温熔盐恒温槽温度场的数值模拟

庞明承, 魏建平, 梁兴忠, 尹跃, 张军

计量学报 ›› 2026, Vol. 47 ›› Issue (1) : 76-84.

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计量学报 ›› 2026, Vol. 47 ›› Issue (1) : 76-84. DOI: 10.3969/j.issn.1000-1158.2026.01.10
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高温熔盐恒温槽温度场的数值模拟

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Numerical Simulation of the Temperature Field of a High Temperature Molten Salt Thermostatic Bath

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摘要

针对现有高温熔盐恒温槽工作区域内温度场均匀性差的问题,以高温熔盐作为流体介质,采用标准k-ε湍流模型,利用FLUENT用户定义函数(UDF)功能对高温熔盐恒温槽的温度进行比例积分微分(PID)控制,通过计算流体动力学(CFD)对其进行模拟仿真,研究了搅拌器及其布局对高温熔盐恒温槽工作区域内流场分布及温度场均匀性的影响。结果表明加入搅拌器后恒温槽内形成明显的循环流动,加快了恒温槽内高温与低温熔盐的混合与传热,将工作区域温度场均匀性从11.708 92 K提高至0.082 33 K;采用上搅拌结构的恒温槽可以有效改善工作区速度分布不均匀的现象,将工作区域温度场均匀性提高至0.039 49 K。

Abstract

To address the issue of poor temperature field uniformity in the working area of existing high-temperature molten salt thermostatic baths, high-temperature molten salt is used as the fluid medium. The standard k-ε turbulence model is employed, and proportional integral derivative (PID) control is applied to the temperature regulation of the thermostatic bath using the UDF function in FLUENT. Computational fluid dynamics (CFD) simulations are performed to study the impact of the agitator and its layout on the flow field distribution and temperature field uniformity in the working area of the high-temperature molten salt thermostatic bath. The results show that the addition of an agitator creates a distinct circulation flow within the thermostatic bath, accelerating the mixing and heat transfer between the high and low-temperature molten salts. This improves the temperature field uniformity in the working area from 11.708 92 K to 0.082 33 K. Additionally, using an upper agitator structure effectively improves the uneven velocity distribution in the working area, enhancing the temperature field uniformity to 0.039 49 K.

关键词

温度计量 / 恒温槽 / 数值模拟 / 高温熔盐 / 温度均匀性 / 标准k-ε湍流模型

Key words

temperature measurement / thermostatic bath / numerical simulation / high-temperature molten salt / temperature uniformity / standard k-ε turbulence model

引用本文

导出引用
庞明承, 魏建平, 梁兴忠, . 高温熔盐恒温槽温度场的数值模拟[J]. 计量学报. 2026, 47(1): 76-84 https://doi.org/10.3969/j.issn.1000-1158.2026.01.10
PANG Mingcheng, WEI Jianping, LIANG Xingzhong, et al. Numerical Simulation of the Temperature Field of a High Temperature Molten Salt Thermostatic Bath[J]. Acta Metrologica Sinica. 2026, 47(1): 76-84 https://doi.org/10.3969/j.issn.1000-1158.2026.01.10
中图分类号: TB942   

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基金

压缩机技术国家重点实验室开放基金(SKL-YSJ202108)

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