IGGCAS OpenIR  > 新生代地质与环境院重点实验室
Dynamic melting behavior of volcanic ash subjected to thermal shock relevant to aviation hazards
Ma, Lin1,2,3; Song, Wenjia4; Guo, Zhengfu1,2,5; Zou, Xinyu2,6; Dingwell, Donald B.3
2022-09-01
Source PublicationJOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
ISSN0377-0273
Volume429Pages:8
AbstractThe ingestion of volcanic ash by aircrafts is widely recognized as a potential hazard for aviation. By melting, adhering, and spreading, ash can permanently damage the thermal barrier coatings in jet engines; consequently, it is important to investigate the melting behavior of volcanic ash. Previous work has concentrated on the relatively isothermal process of melting at a slow heating rate using "characteristic temperatures" identified according to different geometrical characteristics. Characteristic temperatures serve well as the parameters to quantify the successive and continuous melting processes of volcanic ash under the approximately homogeneous isothermal condition. However, when the ash is ingested by a jet engine, there are large and transient thermal gradients, which differs from the near absence of temperature gradients induced in a sample throughout slow and constant heating. Therefore, experiments using slow heating rates and characteristic temperatures are limited in their utility, and new techniques are required. Here, we designed a thermal shock experiment to better reproduce the conditions of volcanic ash encountering a jet engine and proposed three characteristic times to discretize and quantify the continuous melting process of volcanic ash under thermal shock conditions. Three characteristic times are characterized by shape transitions of the specimens to spherical (St1), to hemispherical (Ht2), and to flow state (Ft3). Ash sampled from Eyjafjallajo center dot kull volcano, Iceland, was compacted into cylinders with diameters of 1-3 mm, and then thermally shocked to a target temperature of 1251, 1296, 1341, 1384 or 1427 degrees C. The three characteristic times follow exponential functions of the target temperature. Additionally, in the sintering regime, a retardation of densification was exhibited in the smaller cylinder employed here, whereas the subsequent spreading process was enhanced, resulting in a positive correlation between the size of the volcanic ash cylinder and the characteristic times in the spreading phase. We present a universal empirical function for the hemispherical state involving dimensionless target temperature and the ash's thermal properties. The function provides a fundamental basis for a dynamic melting timescale predicting model for yet smaller volcanic ash particles under even more intense transient thermal loading conditions than those studied here.
KeywordVolcanic ash Thermal shock Melting behavior Spreading Aviation
DOI10.1016/j.jvolgeores.2022.107597
Funding OrganizationVolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant
WOS KeywordFGM CYLINDRICAL PLATES ; AGGREGATION ; CERAMICS
Language英语
Funding ProjectVolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs)[89705] ; Chinese Academy of Sciences[XDB26000000] ; ERC-2018-ADG Grant[834225]
Funding OrganizationVolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; VolkswagenStiftung on "Volcanic Ash Deposition in Jet Engines" (VADJEs) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant ; ERC-2018-ADG Grant
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000814556400004
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105896
Collection新生代地质与环境院重点实验室
矿产资源研究院重点实验室
Corresponding AuthorSong, Wenjia; Guo, Zhengfu
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Ludwig Maximilians Univ Munchen, Dept Earth & Environm Sci, Theresienstr 41, D-80333 Munich, Germany
4.Beihang Univ, Sch Mat Sci & Engn, Xueyuanstr 37, Beijing 100191, Peoples R China
5.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
First Author AffilicationKey Laboratory of Cenozoic Geology and Environment, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Cenozoic Geology and Environment, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ma, Lin,Song, Wenjia,Guo, Zhengfu,et al. Dynamic melting behavior of volcanic ash subjected to thermal shock relevant to aviation hazards[J]. JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH,2022,429:8.
APA Ma, Lin,Song, Wenjia,Guo, Zhengfu,Zou, Xinyu,&Dingwell, Donald B..(2022).Dynamic melting behavior of volcanic ash subjected to thermal shock relevant to aviation hazards.JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH,429,8.
MLA Ma, Lin,et al."Dynamic melting behavior of volcanic ash subjected to thermal shock relevant to aviation hazards".JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH 429(2022):8.
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