气候变化领域集成服务门户(CCPortal): On explosive boiling of a multicomponent Leidenfrost drop

CCPortal

DOI	10.1073/PNAS.2016107118
	On explosive boiling of a multicomponent Leidenfrost drop
	Lyua S.; Tan H.; Wakata Y.; Yang X.; Law C.K.; Lohse D.; Sun C.
发表日期	2021
ISSN	00278424
卷号	118 期号:2
英文摘要	The gasification of multicomponent fuel drops is relevant in various energy-related technologies. An interesting phenomenon associated with this process is the self-induced explosion of the drop, producing a multitude of smaller secondary droplets, which promotes overall fuel atomization and, consequently, improves the combustion efficiency and reduces emissions of liquid-fueled engines. Here, we study a unique explosive gasification process of a tricomponent droplet consisting of water, ethanol, and oil ("ouzo"), by high-speed monitoring of the entire gasification event taking place in the well-controlled, levitated Leidenfrost state over a superheated plate. It is observed that the preferential evaporation of the most volatile component, ethanol, triggers nucleation of the oil microdroplets/nanodroplets in the remaining drop, which, consequently, becomes an opaque oil-in-water microemulsion. The tiny oil droplets subsequently coalesce into a large one, which, in turn, wraps around the remnant water. Because of the encapsulating oil layer, the droplet can no longer produce enough vapor for its levitation, and, thus, falls and contacts the superheated surface. The direct thermal contact leads to vapor bubble formation inside the drop and consequently drop explosion in the final stage. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Internal interaction; Leidenfrost state; Multicomponent drop; Mutual solubility differential; Volatility differentials
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/181021
作者单位	Department of Energy and Power Engineering, Center for Combustion Energy, Tsinghua University, Beijing, 100084, China; Department of Chemical Engineering, University of California, Santa Barbara, CA 93106, United States; Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, United States; MESA+ Institute and J. M. Burgers Centre for Fluid Dynamics, Physics of Fluids Group, University of Twente, Enschede, 7500AE, Netherlands; Max Planck Institute for Dynamics and Self-Organization, Göttingen, 37077, Germany; Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Lyua S.,Tan H.,Wakata Y.,et al. On explosive boiling of a multicomponent Leidenfrost drop[J],2021,118(2).
APA	Lyua S..,Tan H..,Wakata Y..,Yang X..,Law C.K..,...&Sun C..(2021).On explosive boiling of a multicomponent Leidenfrost drop.Proceedings of the National Academy of Sciences of the United States of America,118(2).
MLA	Lyua S.,et al."On explosive boiling of a multicomponent Leidenfrost drop".Proceedings of the National Academy of Sciences of the United States of America 118.2(2021).