Vaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres

Although the gas phase combustion of metallic magnesium (Mg) has been extensively studied, the vaporization and diffusive combustion behaviors of Mg have not been well characterized. This paper proposes an investigation of the vaporization, diffusion, and combustion characteristics of individual Mg...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Fan Yang, Shengji Li, Xunjie Lin, Jiankan Zhang, Heping Li, Xuefeng Huang, Jiangrong Xu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	solid propellants metallic Mg vaporization diffusion combustion Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/889b9e51b9624a99ad7f70782ab1ce9b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:889b9e51b9624a99ad7f70782ab1ce9b
record_format	dspace
spelling	oai:doaj.org-article:889b9e51b9624a99ad7f70782ab1ce9b2021-11-25T18:51:51ZVaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres10.3390/pr91120572227-9717https://doaj.org/article/889b9e51b9624a99ad7f70782ab1ce9b2021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/2057https://doaj.org/toc/2227-9717Although the gas phase combustion of metallic magnesium (Mg) has been extensively studied, the vaporization and diffusive combustion behaviors of Mg have not been well characterized. This paper proposes an investigation of the vaporization, diffusion, and combustion characteristics of individual Mg microparticles in inert and oxidizing gases by a self-built experimental setup based on laser-induced heating and microscopic high-speed cinematography. Characteristic parameters like vaporization and diffusion coefficients, diffusion ratios, flame propagation rates, etc., were obtained at high spatiotemporal resolutions (μm and tens of μs), and their differences in inert gases (argon, nitrogen) and in oxidizing gases (air, pure oxygen) were comparatively analyzed. More importantly, for the core–shell structure, during vaporization, a shock wave effect on the cracking of the porous magnesium oxide thin film shell-covered Mg core was first experimentally revealed in inert gases. In air, the combustion flame stood over the Mg microparticles, and the heterogeneous combustion reaction was controlled by the diffusion rate of oxygen in air. While in pure O<sub>2</sub>, the vapor-phase stand-off flame surrounded the Mg microparticles, and the reaction was dominated by the diffusion rate of Mg vapor. The diffusion coefficients of the Mg vapor in oxidizing gases are 1~2 orders of magnitude higher than those in inert gases. However, the diffusive ratios of condensed combustion residues in oxidizing gases are ~1/2 of those in inert gases. The morphology and the constituent contents analysis showed that argon would not dissolve into liquid Mg, while nitrogen would significantly dissolve into liquid Mg. In oxidizing gases of air or pure O<sub>2</sub>, Mg microparticles in normal pressure completely burned due to laser-induced heating.Fan YangShengji LiXunjie LinJiankan ZhangHeping LiXuefeng HuangJiangrong XuMDPI AGarticlesolid propellantsmetallic MgvaporizationdiffusioncombustionChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 2057, p 2057 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	solid propellants metallic Mg vaporization diffusion combustion Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	solid propellants metallic Mg vaporization diffusion combustion Chemical technology TP1-1185 Chemistry QD1-999 Fan Yang Shengji Li Xunjie Lin Jiankan Zhang Heping Li Xuefeng Huang Jiangrong Xu Vaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres
description	Although the gas phase combustion of metallic magnesium (Mg) has been extensively studied, the vaporization and diffusive combustion behaviors of Mg have not been well characterized. This paper proposes an investigation of the vaporization, diffusion, and combustion characteristics of individual Mg microparticles in inert and oxidizing gases by a self-built experimental setup based on laser-induced heating and microscopic high-speed cinematography. Characteristic parameters like vaporization and diffusion coefficients, diffusion ratios, flame propagation rates, etc., were obtained at high spatiotemporal resolutions (μm and tens of μs), and their differences in inert gases (argon, nitrogen) and in oxidizing gases (air, pure oxygen) were comparatively analyzed. More importantly, for the core–shell structure, during vaporization, a shock wave effect on the cracking of the porous magnesium oxide thin film shell-covered Mg core was first experimentally revealed in inert gases. In air, the combustion flame stood over the Mg microparticles, and the heterogeneous combustion reaction was controlled by the diffusion rate of oxygen in air. While in pure O<sub>2</sub>, the vapor-phase stand-off flame surrounded the Mg microparticles, and the reaction was dominated by the diffusion rate of Mg vapor. The diffusion coefficients of the Mg vapor in oxidizing gases are 1~2 orders of magnitude higher than those in inert gases. However, the diffusive ratios of condensed combustion residues in oxidizing gases are ~1/2 of those in inert gases. The morphology and the constituent contents analysis showed that argon would not dissolve into liquid Mg, while nitrogen would significantly dissolve into liquid Mg. In oxidizing gases of air or pure O<sub>2</sub>, Mg microparticles in normal pressure completely burned due to laser-induced heating.
format	article
author	Fan Yang Shengji Li Xunjie Lin Jiankan Zhang Heping Li Xuefeng Huang Jiangrong Xu
author_facet	Fan Yang Shengji Li Xunjie Lin Jiankan Zhang Heping Li Xuefeng Huang Jiangrong Xu
author_sort	Fan Yang
title	Vaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres
title_short	Vaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres
title_full	Vaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres
title_fullStr	Vaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres
title_full_unstemmed	Vaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres
title_sort	vaporization, diffusion and combustion of laser-induced individual magnesium microparticles in inert and oxidizing atmospheres
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/889b9e51b9624a99ad7f70782ab1ce9b
work_keys_str_mv	AT fanyang vaporizationdiffusionandcombustionoflaserinducedindividualmagnesiummicroparticlesininertandoxidizingatmospheres AT shengjili vaporizationdiffusionandcombustionoflaserinducedindividualmagnesiummicroparticlesininertandoxidizingatmospheres AT xunjielin vaporizationdiffusionandcombustionoflaserinducedindividualmagnesiummicroparticlesininertandoxidizingatmospheres AT jiankanzhang vaporizationdiffusionandcombustionoflaserinducedindividualmagnesiummicroparticlesininertandoxidizingatmospheres AT hepingli vaporizationdiffusionandcombustionoflaserinducedindividualmagnesiummicroparticlesininertandoxidizingatmospheres AT xuefenghuang vaporizationdiffusionandcombustionoflaserinducedindividualmagnesiummicroparticlesininertandoxidizingatmospheres AT jiangrongxu vaporizationdiffusionandcombustionoflaserinducedindividualmagnesiummicroparticlesininertandoxidizingatmospheres
_version_	1718410600351006720

Vaporization, Diffusion and Combustion of Laser-Induced Individual Magnesium Microparticles in Inert and Oxidizing Atmospheres

Ejemplares similares