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关于由爆燃火焰前沿产生的压力波。

On the pressure wave emanating from a deflagration flame front.

作者信息

Bisio V, Montomoli F, Rossin S, Tagarielli V L

机构信息

Department of Aeronautics, Imperial College London, SW7 2AZ, UK.

Baker Hughes, Via Felice Matteucci 2, 50127, Firenze, FI, Italy.

出版信息

Heliyon. 2024 Feb 7;10(3):e26012. doi: 10.1016/j.heliyon.2024.e26012. eCollection 2024 Feb 15.

DOI:10.1016/j.heliyon.2024.e26012
PMID:38371964
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10873735/
Abstract

We consider a spherical flame expanding from an ignition point through a homogeneous, flammable gaseous mixture. We analytically predict the transient pressure and velocity fields ahead of the flame as a function of the flame front position, which is assumed to evolve in time according to a power-law relation. The predictions are successfully validated by CFD simulations. We show that the model is also effective for analyzing real deflagration problems, by predicting measurements taken in hydrocarbon deflagration tests.

摘要

我们考虑一个从点火点通过均匀可燃气体混合物膨胀的球形火焰。我们通过解析预测火焰前方的瞬态压力和速度场，作为火焰前沿位置的函数，假设火焰前沿位置根据幂律关系随时间演化。这些预测通过计算流体动力学（CFD）模拟得到了成功验证。我们表明，该模型通过预测烃类爆燃试验中的测量结果，对于分析实际爆燃问题也是有效的。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/046ff9b66e4b/gr6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/fe19592ec384/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/526e212cfb6a/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/5eca92c6b714/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/9a8710b1fcf3/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/e65e684a6833/gr5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/046ff9b66e4b/gr6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/fe19592ec384/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/526e212cfb6a/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/5eca92c6b714/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/9a8710b1fcf3/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/e65e684a6833/gr5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a06/10873735/046ff9b66e4b/gr6.jpg

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本文引用的文献

1
Accelerative propagation and explosion triggering by expanding turbulent premixed flames.膨胀湍流预混火焰的加速传播与爆炸触发
Phys Rev E Stat Nonlin Soft Matter Phys. 2013 Feb;87(2):023008. doi: 10.1103/PhysRevE.87.023008. Epub 2013 Feb 13.
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The air wave surrounding an expanding sphere.围绕一个正在膨胀球体的气波。
Proc R Soc Lond A Math Phys Sci. 1946;186(1006):273-92. doi: 10.1098/rspa.1946.0044.
3
Stability and the fractal structure of a spherical flame in a self-similar regime.自相似状态下球形火焰的稳定性与分形结构
Phys Rev Lett. 1996 Apr 8;76(15):2814-2817. doi: 10.1103/PhysRevLett.76.2814.