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The Superheat Phenomenon in the Combustion of Magnesium ParticlesMagnesium is known to be a likely fuel for engines that could work in the CO2 atmospheres of Mars and Venus. The present paper reports temperature measurements of magnesium samples during combustion in CO2. The burning sample temperature increases with the decrease in the initial size. The temperature of the 1-mm samples is 300-400 K higher than the boiling point of magnesium. The stability of the superheated drop is explained by the presence of a porous shell on the surface. An attempt has been made to describe vaporization on the superheated drop by the Knudsen-Langmuir equation. During combustion at high-pressure fragment ejection of the flame is observed in high-speed motion pictures. This phenomenon is shown to be connected with the drop superheat. The repeated fracture of the outer shell formed in the flame ensures the complete burnout of metal particles at high pressure.
Document ID
19920046868
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Shafirovich, E. IA.
(Academy of Sciences (Russia) Chernogolovka, Russian Federation)
Goldshleger, U. I.
(Academy of Sciences (Russia) Chernogolovka, Russian Federation)
Date Acquired
August 15, 2013
Publication Date
March 1, 1992
Publication Information
Publication: Combustion and Flame
Volume: 88
ISSN: 0010-2180
Subject Category
Propellants And Fuels
Report/Patent Number
E-8374
Accession Number
92A29492
Distribution Limits
Public
Copyright
Other

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