Impact of turbulence model in coupled simulation of ethylene cracking furnace

NI Chengzhen; DU Wenli; HU Guihua

doi:10.11949/j.issn.0438-1157.20181129

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Impact of turbulence model in coupled simulation of ethylene cracking furnace

Process system engineering | 更新时间：2026-07-24

- Impact of turbulence model in coupled simulation of ethylene cracking furnace
- CIESC Journal Vol. 70, Issue 2, Pages: 450-459(2019)
- 作者机构：
  
  1.华东理工大学信息科学与工程学院，上海 200237
  2.华东理工大学化工过程先进控制和优化技术教育部重点实验室，上海 200237
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181129
  CLC： TQ 021.1;TE 963
- Received：08 October 2018，
  
  Revised：2018-10-26，
  
  Online First：16 June 2020，
  
  Published：05 February 2019
- 稿件说明：
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倪城振, 杜文莉, 胡贵华. 乙烯裂解炉耦合模拟中湍流模型的影响分析[J]. 化工学报, 2019, 70(2): 450-459

NI Chengzhen, DU Wenli, HU Guihua. Impact of turbulence model in coupled simulation of ethylene cracking furnace[J]. CIESC Journal, 2019, 70(2): 450-459
倪城振, 杜文莉, 胡贵华. 乙烯裂解炉耦合模拟中湍流模型的影响分析[J]. 化工学报, 2019, 70(2): 450-459 DOI： 10.11949/j.issn.0438-1157.20181129.

NI Chengzhen, DU Wenli, HU Guihua. Impact of turbulence model in coupled simulation of ethylene cracking furnace[J]. CIESC Journal, 2019, 70(2): 450-459 DOI： 10.11949/j.issn.0438-1157.20181129.

摘要

配备底部烧嘴和侧壁烧嘴的乙烯裂解炉应用越来越广泛，不同燃烧模式影响着炉膛内湍流流动状态，考虑到裂解炉中湍流流动与燃气喷料、燃烧和传热有较强的非线性耦合作用，为此探究不同湍流模型在裂解炉/反应器耦合模拟中的影响对于裂解炉的精确设计和优化至关重要。针对不同湍流模型对某十万吨工业乙烯裂解炉进行了耦合模拟，利用CFD数值模拟对采用标准

k-ε

模型、RNG

k-ε

和Realizable

k-ε

模型所建立的湍流流动模型进行评估。将三种湍流模型的模拟结果与工业数据进行比较，重点分析了裂解炉内的速度、温度、湍流能力等参数的分布情况，表明Realizable

k-ε

模型在火焰稳定性、反应效率等方面优于其他两种模型，且基于Realizable

k-ε

湍流方程的反应管模型在热通量、炉管外壁温度分布计算结果更接近实际工况。

Abstract

The ethylene cracking furnace equipped with the bottom burner and the side wall burner is more and more widely used. Different combustion modes affect the turbulent flow state in the furnace. Considering the turbulent flow in the cracking furnace and the gas injection

the combustion and heat transfer are strong. The nonlinear coupling effect

or this purpose

explores the influence of different turbulence models in the cracking furnace/reactor coupling simulation is critical for the precise design and optimization of the cracking furnace. In this paper

a coupling simulation for a 100000 t industrial ethylene cracking furnace was carried out for different turbulence models. The turbulent flow model established by the standard

model

RNG

and Realizable

model was evaluated by CFD numerical simulation. The simulation results of the three turbulence models are compared with the industrial data. The distribution of velocity

temperature and turbulence capacity in the cracking furnace is analyzed. The results show that the Realizable

model is superior to the other two models in flame stability and reaction efficiency. And based on the Realizable

turbulence equation

the calculation results of the heat flux and the outer wall temperature distribution of the furnace tube are closer to the actual working conditions.

关键词

Keywords

references

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