Study on mixing regularity of hydrogen-blended natural gas static mixer based on CFD simulation

XIANG Yong; XIE Ruonan; ZHANG Yuhang; ZHANG Xiaorui; SUN Mingye; WANG Deqiang; WANG Jian

doi:10.12434/j.issn.2097-2547.20240421

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Study on mixing regularity of hydrogen-blended natural gas static mixer based on CFD simulation

更新时间：2025-09-26

- Study on mixing regularity of hydrogen-blended natural gas static mixer based on CFD simulation
- Vol. 50, Issue 9, Pages: 91-99(2025)
- 作者机构：
  
  1.中国石油大学（北京）低碳能源装备与材料保护实验室，北京 102249
  2.北京市煤气热力工程设计院有限公司，北京 100032
  3.乌海凯洁燃气有限责任公司，内蒙古乌海 016000
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240421
  CLC： TE89
- Received：14 October 2024，
  
  Revised：2024-11-04，
  
  Published：25 September 2025
- 稿件说明：
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向勇,谢若男,张宇航等.基于CFD模拟的掺氢天然气静态混合器混合规律研究[J].低碳化学与化工,2025,50(09):91-99.

XIANG Yong,XIE Ruonan,ZHANG Yuhang,et al.Study on mixing regularity of hydrogen-blended natural gas static mixer based on CFD simulation[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(09):91-99.
向勇,谢若男,张宇航等.基于CFD模拟的掺氢天然气静态混合器混合规律研究[J].低碳化学与化工,2025,50(09):91-99. DOI： 10.12434/j.issn.2097-2547.20240421.

XIANG Yong,XIE Ruonan,ZHANG Yuhang,et al.Study on mixing regularity of hydrogen-blended natural gas static mixer based on CFD simulation[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(09):91-99. DOI： 10.12434/j.issn.2097-2547.20240421.

摘要

天然气掺氢管输能够有效缓解天然气供应压力，消纳可再生能源，实现氢气低成本高效运输。氢气密度明显小于天然气，因此亟需研究天然气掺氢静态混合器混合效果，为天然气掺氢运输工艺与规范奠定基础。构建了静态混合器几何模型，使用Realizable

湍流模型和组分输运模型进行了数值模拟计算，基于CFD仿真模拟了甲烷与氢气的掺混情况，分析了静态混合器混合的流场以及甲烷入口流速、甲烷入口压力和混合单元数对混合效果的影响。结果表明，增加了氢气喷射器的SX型静态混合器，在氢气喷射器及两个混合单元处湍流强度明显增大，两个混合单元通过交错叶片使流体分割汇合，能明显促进掺氢天然气混合均匀。掺氢比（体积比）为20%的工况下，在甲烷入口流速为0.25~1.00 m/s、

在3.0~10.8范围内，甲烷入口流速增大，混合均匀性提高；在甲烷入口压力为1~3 MPa、

在3.0~10.8范围内，甲烷入口压力越高，混合效果越好。此外，混合单元数提高对混合均匀性提升相对较小。

Abstract

Hydrogen blended to natural gas pipeline transmission can relieve the pressure of natural gas supply

consume renewable energy

and achieve low cost and high efficient transportation of hydrogen. Since the density of hydrogen is much smaller than that of natural gas

there is an urgent need to study the mixing effect of hydrogen blended to natural gas static mixer to lay the foundation for hydrogen blended to natural gas process and specification. The geometric model of the static mixer was constructed

and numerical simulations were conducted using the Realizable

turbulence model and the species transport model. Based on CFD simulations

the mixing situation of methane and hydrogen was analyzed

along with the flow field of the static mixer and the effects of methane inlet velocity

methane inlet pressure

and the number of mixing units on the mixing efficiency. The results indicate that the SX type static mixer equipped with a hydrogen injector significantly increases turbulence intensity at the hydrogen injector and the two mixing units. The two mixing units separate and converge the fluid through staggered blades

which have a significant effect on p

romoting uniform mixing. At a hydrogen blending ratio (volume fraction) of 20%

the methane inlet flow velocity increases and the mixing uniformity improves within the methane inlet pressure of 0.25~1.00 m/s and

3.0~10.8. Within the methane inlet pressure of 1~3 MPa and

3.0~10.8

increasing the methane inlet pressure results in better mixing efficiency. Otherwise

the increase of the number of mixing units has a relatively small effect on the improvement of mixing uniformity.

关键词

Keywords

references

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