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676 results on '"Lan, Yanhua"'

22. Insight into energy release characteristics of TiH2dust explosion through ignition experiments and molecular dynamic simulations

Author

Zhang, Ting, Zhang, Jiefan, Geng, Shuang, Zhang, Xin, Liu, Runqing, Fu, Guoen, Xu, Jianfu, Zhao, Haixia, Lan, Yanhua, Feng, Yongan, and Cao, Weiguo

Abstract

TiH2is an efficient hydrogen storage material with high energy density and relatively stable chemical quality, which is commonly used in metal sponge production, hydrogen storage, battery technology, rocket propellants, etc. In this study, TiH2dust explosion is systematically investigated by integrating ignition experiments with reactive force field molecular dynamics simulation. Findings show that when the TiH2dust concentration is 750 g·m−3, both the explosion pressure and explosion pressure rise rate reach their maximum values under airtight and venting conditions. There are three stages in the whole combustion process: the combustion development stage, the stable combustion stage, and the decay stage. The flame length (L) and flame propagation velocity (v) grow with the increase of dust concentration. TiH2dust explosion with different concentrations in macroscopic tests is approximated by simulating the combustion behaviors of the TiH2system with different densities. The combustion reaction rate of TiH2grows with an increase in system density, and the simulation results are consistent with experimental findings.

Published
2024
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23. Intrafibrillar Mineralization and Immunomodulatory for Synergetic Enhancement of Bone Regeneration via Calcium Phosphate Nanocluster Scaffold (Adv. Healthcare Mater. 12/2023)

Author

Zhou, Yanyan, primary, Hu, Zihe, additional, Jin, Wenjing, additional, Wu, Haiyan, additional, Zuo, Minghao, additional, Shao, Changyu, additional, Lan, Yanhua, additional, Shi, Yang, additional, Tang, Ruikang, additional, Chen, Zhuo, additional, Xie, Zhijian, additional, and Shi, Jue, additional

Published
2023
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25. Insight into thermal decomposition behavior of ammonium dinitramide‐based liquid propellant through reactive molecular dynamics simulations.

Author

Meng, Weifeng, Zhang, Ting, Guo, Zhuiyue, Qin, Weihua, Lan, Yanhua, and Zhai, Jinxian

Subjects
PROPELLANTS, MOLECULAR dynamics, METHANOL as fuel, CHEMICAL reactions, LIQUIDS, ACTIVATION energy, FREE radicals
Abstract

The thermal decomposition characteristics and fuel oxidation mechanism of ammonium dinitramide (ADN)‐based liquid propellant are of great practical significance, but it is difficult to detect the whole intermediates and products using traditional experimental methods. In this paper, the thermal decomposition of ADN‐based liquid propellant at different temperatures (1500, 2000, 2500, and 3000 K) was simulated using the reactive molecular dynamics method. The effect of temperature on the thermal decomposition of propellant and the distribution of the main products were investigated. The results showed that the temperature played a role in promoting the decomposition of propellant. The main products of ADN‐based liquid propellant were N2, H2O, NH3, HNO3, ⋅NHO, CH2O, CO2, and NO2, while their evolution and generation pathways were also described in detail. The initial decomposition of ADN was the breakage of N−H bonds in ⋅NH4 or N−N/N−O bonds in ⋅N(NO2)2, and methanol generated free radicals by dehydrogenation. There was no direct chemical reaction between ADN and methanol, and the interaction was accomplished through the generation and consumption of free radicals. H2O provided a large amount of ⋅H and ⋅HO leading to a lower activation energy of ADN in propellant than that from reference. The overall reaction mechanism of the liquid propellant was deduced. The results would help to further investigate the reaction mechanism of ADN‐based liquid propellants. [ABSTRACT FROM AUTHOR]

Published
2023
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48. Erratum: Iridates from the molecular side

Author

Pedersen, Kasper S., Bendix, Jesper, Tressaud, Alain, Durand, Etienne, Weihe, Høgni, Salman, Zaher, Morsing, Thorbjørn J, Woodruff, Daniel N., Lan, Yanhua, Wernsdorfer, Wolfgang, Mathonière, Corine, Piligkos, Stergios, Klokishner, Sophia I., Ostrovsky, Serghei, Ollefs, Katharina, Wilhelm, Fabrice, Rogalev, Andrei, and Clérac, Rodolphe

Published
2016
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