The detonation properties of mixtures of gelled nitromethane (NM) with hollow glass microballoons (GMBs), the concentration of which varied from 16 to 30 wt. %, have been studied using an optical technique with high temporal and spatial resolution. It is shown that the addition of GMBs up to 30 wt. % does not qualitatively change the reaction zone structure of NM, which is in accordance with the classical detonation theory. However, the detonation parameters of the mixture decrease significantly with increasing GMB concentration—the pressure at the Chapman–Jouguet point drops by more than an order of magnitude at a porosity of 75%. The non-monotonic nature of the change in critical detonation diameter with decreasing mixture density is noted. The dependence of the critical diameter on the porosity of U-shape with the formation of two local minima at 8 and 18 wt. % GMB in the mixture and a local maximum at 13 wt. % GMB is obtained. At a concentration above 20 wt. % GMB, the critical detonation diameter increases dramatically, and at 30 wt. % GMB, the critical diameter becomes comparable to that of gelled NM.
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February 2024
Research Article|
February 14 2024
Detonation parameters of the mixture of gelled nitromethane/microballoons at high porosity
Valentina Mochalova (Валентина Мочалова)
;
Valentina Mochalova (Валентина Мочалова)
a)
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Supervision, Validation, Writing – original draft)
1
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS
, Chernogolovka, Russia
a)Author to whom correspondence should be addressed: [email protected]
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Alexander Utkin (Александр Уткин)
;
Alexander Utkin (Александр Уткин)
(Conceptualization, Data curation, Formal analysis, Methodology, Project administration, Writing – original draft)
1
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS
, Chernogolovka, Russia
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Mikhail Shakula (Михаил Шакула);
Mikhail Shakula (Михаил Шакула)
(Formal analysis, Investigation, Writing – review & editing)
1
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS
, Chernogolovka, Russia
2
MIPT
, Dolgoprudnyy, Russia
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Vladimir Lavrov (Владимир Лавров)
;
Vladimir Lavrov (Владимир Лавров)
(Conceptualization, Methodology, Writing – review & editing)
1
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS
, Chernogolovka, Russia
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Sergey Koldunov (Сергей Колдунов);
Sergey Koldunov (Сергей Колдунов)
(Data curation, Methodology, Writing – review & editing)
1
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS
, Chernogolovka, Russia
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Mikhail Zhidkov (Михаил Жидков)
Mikhail Zhidkov (Михаил Жидков)
(Investigation, Methodology, Writing – review & editing)
1
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS
, Chernogolovka, Russia
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a)Author to whom correspondence should be addressed: [email protected]
Physics of Fluids 36, 026112 (2024)
Article history
Received:
December 19 2023
Accepted:
January 19 2024
Citation
Valentina Mochalova, Alexander Utkin, Mikhail Shakula, Vladimir Lavrov, Sergey Koldunov, Mikhail Zhidkov; Detonation parameters of the mixture of gelled nitromethane/microballoons at high porosity. Physics of Fluids 1 February 2024; 36 (2): 026112. https://doi.org/10.1063/5.0192428
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