Combustion models for shock-induced cloud ignition of aluminium particles using smoothed particle hydrodynamics

IF 1.7 4区 工程技术 Q3 MECHANICS
M. Omang, K. O. Hauge, J. K. Trulsen
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Abstract

The present work is a numerical follow-up on our published experimental paper on shock ignition of aluminium particle clouds in the low-temperature regime. The in-house multi-phase regularized smoothed particle hydrodynamics (MP-RSPH) code is used to perform numerical simulations with an increasing degree of complexity, looking at single-phase, inert, and reactive particles in separate simulations. The first part of the paper gives a short description of the additional physics added to the code. Based on the experimental results, the numerical code is then used to estimate the particle temperature at the time of ignition. Results from simulations with three different numerical descriptions, the diffusive, kinetic, and total burn rates, are then compared to the experimental results. The two diffusive burn rate simulations (K &H and O &H) show the best fit to the experimental results. The burn rate formula based on our experimental data (O &H) is preferred, since it has the gas temperature dependency included and does not require additional parameter adjustments. The results from the numerical simulations support the theory that the observed aluminium particle cloud burning process is diffusive, as indicated in the experimental paper.

Abstract Image

基于光滑颗粒流体力学的铝颗粒激波云点火燃烧模型
目前的工作是我们发表的关于低温条件下铝粒子云的激波点火的实验论文的数值后续。内部的多相正则化光滑颗粒流体动力学(MP-RSPH)代码用于执行越来越复杂的数值模拟,在单独的模拟中观察单相、惰性和活性颗粒。本文的第一部分简要描述了添加到代码中的附加物理特性。在实验结果的基础上,利用数值计算方法估计了颗粒着火时的温度。采用扩散燃烧速率、动力学燃烧速率和总燃烧速率三种不同数值描述的模拟结果与实验结果进行了比较。两种扩散燃烧速率(K &H和O &H)的模拟结果与实验结果吻合最好。基于我们实验数据(O &H)的燃烧速率公式是首选的,因为它包含了气体温度依赖性,不需要额外的参数调整。数值模拟结果与实验结果一致,证实了观测到的铝粒子云燃烧过程是扩散的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Shock Waves
Shock Waves 物理-力学
CiteScore
4.10
自引率
9.10%
发文量
41
审稿时长
17.4 months
期刊介绍: Shock Waves provides a forum for presenting and discussing new results in all fields where shock and detonation phenomena play a role. The journal addresses physicists, engineers and applied mathematicians working on theoretical, experimental or numerical issues, including diagnostics and flow visualization. The research fields considered include, but are not limited to, aero- and gas dynamics, acoustics, physical chemistry, condensed matter and plasmas, with applications encompassing materials sciences, space sciences, geosciences, life sciences and medicine. Of particular interest are contributions which provide insights into fundamental aspects of the techniques that are relevant to more than one specific research community. The journal publishes scholarly research papers, invited review articles and short notes, as well as comments on papers already published in this journal. Occasionally concise meeting reports of interest to the Shock Waves community are published.
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