Effect of wall roughness on CO<sub>2</sub> non-equilibrium condensation in supersonic nozzles

CHEN Jianan; GAO Yuanyuan; HUANG Zhu

doi:10.12434/j.issn.2097-2547.20250285

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Effect of wall roughness on CO₂ non-equilibrium condensation in supersonic nozzles

更新时间：2026-05-22

- Effect of wall roughness on CO₂ non-equilibrium condensation in supersonic nozzles
- Vol. 51, Issue 5, Pages: 87-94(2026)
- 作者机构：
  
  西安交通大学能源与动力工程学院，陕西西安 710049
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250285
  CLC： TK09
- Received：26 June 2025，
  
  Revised：2025-07-22，
  
  Published：25 May 2026
- 稿件说明：
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陈佳男,高媛媛,黄柱.壁面粗糙度对超音速喷管内部CO₂非平衡凝结的影响[J].低碳化学与化工,2026,51(5):87-94. DOI: 10.12434/j.issn.2097-2547.20250285.

CHEN Jianan,GAO Yuanyuan,HUANG Zhu.Effect of wall roughness on CO₂ non-equilibrium condensation in supersonic nozzles[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(5):87-94. DOI: 10.12434/j.issn.2097-2547.20250285.
陈佳男,高媛媛,黄柱.壁面粗糙度对超音速喷管内部CO₂非平衡凝结的影响[J].低碳化学与化工,2026,51(5):87-94. DOI: 10.12434/j.issn.2097-2547.20250285. DOI：

CHEN Jianan,GAO Yuanyuan,HUANG Zhu.Effect of wall roughness on CO₂ non-equilibrium condensation in supersonic nozzles[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(5):87-94. DOI: 10.12434/j.issn.2097-2547.20250285. DOI：

摘要

超音速分离在清洁能源处理和碳捕集技术等方面具有较大的应用价值，对构建清洁能源体系具有重要作用。为了分析壁面粗糙度对CO

非平衡凝结和超音速分离性能的影响，通过数学模型对CO

在非平衡态中的传质传热现象进行了预测，并通过修正壁面函数考虑了壁面粗糙度的影响。结果表明，壁面粗糙度会阻碍喷管内部的膨胀进程，进而对CO

在喷管中的膨胀性能产生负面影响。此外，膨胀过程受阻会减缓粗糙喷管内部热力学系统向非平衡态移动的进程，进而推迟了凝结核心的形成，导致峰值成核率与液相质量分数均减小。其中，当喷管壁面粗糙度从0.00 mm增大至0.20 mm时，峰值成核率从8.04 × 10

-3

/s减小至5.73 × 10

-3

/s，减小幅度为28.7%，同时成核空间减小了10.2%；液相质量分数从0.047减小至0.042，峰值成核率减小幅度为10.6%，同时液相空间减小了13.4%。

Abstract

Supersonic separation has significant application value in clean energy processing

carbon capture technology and other fields

and plays an important role in building clean energy system. To analyse the effect of wall roughness on CO

non-equilibrium condensation and supersonic separation performance

a mathematical model was built to predict the mass and heat transfer phenomena of CO

in non-equilibrium state

and the wall roughness was considered by modifying the wall function. The results show that the wall roughness hinders the expansion process in the nozzle

thereby weakening the expansion performance of CO

. Furthermore

the obstruction of expansion process slows down the process of thermodynamic system moving towards the non-equilibrium state

thereby delaying the formation of condensation nuclei and reducing the peak nucleation rate and liquid fraction. Among them

when the roughness increases from 0.00 mm to 0.20 mm

the peak nucleation rate decreases from 8.04 × 10

-3

/s to 5.73 × 1

-3

with a decrease of 28.7%

and the nucleation space decreases by 10.2% at the same time. The liquid mass fraction decreases from 0.047 to 0.042

with nucleation space reduction of 10.6%

while the liquid phase space decreases by 13.4%.

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Keywords

references

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Effect of wall roughness on CO2 non-equilibrium condensation in supersonic nozzles

DOI：10.12434/j.issn.2097-2547.20250285

摘要

Abstract

关键词

Keywords

references

Effect of wall roughness on CO₂ non-equilibrium condensation in supersonic nozzles