Experimental and large eddy simulation study on gasoline-air mixture explosions in semi-confined pipe with 90° right-angle bend

LI Meng; DU Yang; LI Guoqing; WANG Shimao; LIU Chong; WEI Shihao

doi:10.11949/j.issn.0438-1157.20180519

您当前的位置：

首页 >

文章列表页 >

Experimental and large eddy simulation study on gasoline-air mixture explosions in semi-confined pipe with 90° right-angle bend

更新时间：2025-12-10

- Experimental and large eddy simulation study on gasoline-air mixture explosions in semi-confined pipe with 90° right-angle bend
- CIESC Journal Issue 12, Pages: 5370-5378(2018)
- 作者机构：
  
  1. 陆军勤务学院油料系,重庆,401311
  2. 63926部队,北京,100000
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180519
  CLC： 932
- Online First：05 December 2018，
  
  Published：05 December 2018
- 稿件说明：
移动端阅览
LI Meng, DU Yang, LI Guoqing, et al. Experimental and large eddy simulation study on gasoline-air mixture explosions in semi-confined pipe with 90° right-angle bend[J]. CIESC Journal, 2018, (12): 5370-5378.
DOI：

LI Meng, DU Yang, LI Guoqing, et al. Experimental and large eddy simulation study on gasoline-air mixture explosions in semi-confined pipe with 90° right-angle bend[J]. CIESC Journal, 2018, (12): 5370-5378. DOI： 10.11949/j.issn.0438-1157.20180519.

摘要

针对含90°直角弯管结构受限空间油气泄压爆炸特性进行了研究，采用高速摄影等技术对爆炸过程中的压力瞬变、火焰形态进行了采集，同时对实验进行了大涡模拟，精确模拟了火焰经过弯管时的超压特性、流场结构以及火焰形态，并与实验结果进行了对比分析。结果表明：（1）弯管结构对于爆炸过程中火焰结构有影响，在受限空间内火焰形态发生“半球形—指尖形—毛刷状”三种形态转变。（2）在弯管处形成的毛刷状火焰是由弯管局部压力梯度形成的涡流导致的。（3）衍射波与反射波在弯管处的叠加对爆炸超压峰值具有强化作用。（4）爆炸过程中，爆炸超压峰值、火焰速度、火焰锋面面积表现出显著的耦合性，具有密切的内在联系，三者随时间变化趋势存在较强的一致性。

Abstract

The characteristics of oil and gas pressure and explosion in a confined space with a 90° right-angle bend structure are studied. The pressure transient and flame morphology were collected by high-speed photography. At the same time

the large eddy simulation of the experiment is carried out. The overpressure

field structure and the shape of the flame passing through the pipe are accurately simulated

and the results are compared with the experimental results. The results showed that:(1) The bend has an effect on the flame structure during the explosion

and in the shape change. (2) The brush-like flame formed at the bend is caused by the vortex generated by the local pressure gradient of the bend. (3) The superposition of the local diffracted wave and the reflected wave in the bend have an enhanced effect on the peak value of the explosion overpressure. (4) During the explosion process

the peak value of explosion overpressure

flame speed and flame front area show significant coupling and close internal relationship. The three have strong consistency with time.

关键词

Keywords

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Large eddy simulation of gas turbulent deflagration in small-scale confined space

Characteristics of ash deposition on a novel heat transfer surface

Characteristics of outdoor air dehumidifier combined with heat pump system and solid desiccant plates

Numerical simulation of gas production from hydrate by depressurization combined with well-wall heating

Heat transfer characteristics of honeycomb liquid-cooled power battery module

Related Author

WEN Xiaoping

YU Minggao

DENG Haoxin

CHEN Junjie

WANG Fahui

LIU Zhichao

LI Jinbo

WANG Peili

Related Institution

School of Mechanical and Power Engineering, Henan Polytechnic University

School of Safety Science and Engineering, Henan Polytechnic University

Center of Thermal Science and Technology, Shandong University, Ji'nan

School of Mechanical Engineering, University of Science and Technology Beijing

Guangzhou Research Center for Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences

⁰