EN超临界甲烷-氢气混合工质在水平圆管内流动传热特性数值研究
Numerical study on flow and heat transfer characteristics of supercritical methane-hydrogen mixture in a horizontal tube
- 热力发电 2025年第11期 页码：24-31
- 作者机构：
- 作者简介：
- 基金信息：辽宁省教育厅基本科研项目（LJKMZ20220725）~~
DOI：10.19666/j.rlfd.202501009
中图分类号：-
纸质出版：2025
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吕英营, 张丽, 李刚, 等. 超临界甲烷-氢气混合工质在水平圆管内流动传热特性数值研究[J]. 热力发电, 2025,(11):24-31.
吕英营, 张丽, 李刚, et al. Numerical study on flow and heat transfer characteristics of supercritical methane-hydrogen mixture in a horizontal tube[J]. Thermal Power Generation, 2025, (11): 24-31.
吕英营, 张丽, 李刚, 等. 超临界甲烷-氢气混合工质在水平圆管内流动传热特性数值研究[J]. 热力发电, 2025,(11):24-31. DOI： 10.19666/j.rlfd.202501009.
吕英营, 张丽, 李刚, et al. Numerical study on flow and heat transfer characteristics of supercritical methane-hydrogen mixture in a horizontal tube[J]. Thermal Power Generation, 2025, (11): 24-31. DOI： 10.19666/j.rlfd.202501009.
摘要
采用RNG k-?湍流模型对超临界CH_4-H_2混合工质在水平管内的流动传热特性进行数值模拟。分析了掺氢比为0～30%的CH_4-H_2混合工质的热物理性质，以及掺氢比为0～15%时水平管内的换热过程。重点研究了质量流速（150～250 kg/(m~2·s)）、热流密度（150～250 kW/m~2）对掺氢比为10%的CH_4-H_2混合工质流动换热特性的影响。结果表明：当掺氢比从0增加到30%时，CH_4-H_2混合工质的拟临界温度从190.4 K略有升高随后立即降至181.7 K，拟临界压力从4.3 MPa升高到12.3 MPa；随着掺氢比（0～15%）的增加，流体与壁面间换热强化；增大质量流量强化了CH_4-H_2混合工质的换热能力，削弱了由浮力效应导致的换热恶化程度；增加热流密度强化了混合工质下壁面的换热程度，但类气膜的提前出现削弱了上壁面的换热程度。增大质量流速和热流密度可以不同程度地强化换热。研究结果可为掺氢天然气输送以及动力循环系统中的混合工质换热器提供理论参考。
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