Numerical study on flow and heat transfer characteristics of supercritical methane-hydrogen mixture in a horizontal tube

吕英营; 张丽; 李刚; 王长顺; 海笑; 高月; 杨帆

doi:10.19666/j.rlfd.202501009

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Numerical study on flow and heat transfer characteristics of supercritical methane-hydrogen mixture in a horizontal tube

Thermal Power Generation Vol. 54, Issue 11, Pages: 24-31(2025)

更新时间：2026-08-11

- Numerical study on flow and heat transfer characteristics of supercritical methane-hydrogen mixture in a horizontal tube
- 作者机构：
  
  1. 辽宁石油化工大学石油天然气工程学院
  2. 辽宁石油化工大学机械工程学院
  3. 大连船舶重工集团装备制造有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202501009
  CLC： TK124
- Published：2025
- 稿件说明：
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[1]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],2025,54(11):24-31.
[1]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],2025,54(11):24-31. DOI： 10.19666/j.rlfd.202501009.

DOI：10.19666/j.rlfd.202501009.

摘要

采用RNG k-?湍流模型对超临界CH

-H

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

-H

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

·s))、热流密度(150～250 kW/m

)对掺氢比为10%的CH

-H

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

-H

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

-H

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。

Abstract

The RNG k-? model was used to numerically simulate the flow and heat transfer characteristics of supercritical CH

-H

mixtures in horizontal pipe. The thermal physical properties of the CH

-H

mixtures with hydrogen ratio of 0～30%

as well as the heat transfer process of the CH

-H

mixtures with hydrogen ratio of 0～15% in the horizontal

tube were analyzed. The influences of mass flow rate(150～250 kg/(m

·s)) and heat flux density(150～250 kW/m

) on flow and heat transfer of the mixed working fluid with hydrogen ratio of 10% were studied. The results show that when the hydrogen ratio increases from 0 to 30%

the pseudo-critical temperature of the mixed working fluid increases slightly from 190.4 K and then sharply decreases to 181.7 K

and the pseudo-critical pressure increases from 4.3 MPa to 12.3 MPa. With the increase of the hydrogen ratio(0～15%)

the heat transfer between the fluid and the wall is strengthened. The increase of mass flow rate strengthens the heat transfer capacity of the mixed working fluid and weakens the heat transfer deterioration caused by buoyancy effect. The increase of heat flux strengthens the heat transfer degree of the wall under the mixed working medium

and weakens the heat transfer degree of the upper wall due to the advanced appearance of the gas-like film. Increasing the mass flow rate and heat flux density can enhance the heat transfer to varying degrees. The research can provide theoretical reference for mixed working medium heat exchangers in hydrogen-doped natural gas transmission and power circulation systems.

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