Melting Point of Carbon Particles behind the Gas Detonation Front
نویسندگان
چکیده
A mathematical model of gas detonation fuel-enriched mixtures hydrocarbons with oxygen has been formulated, which makes it possible to numerically study the equilibrium flows products in presence free carbon condensation. Reference data for graphite were used describe thermodynamic properties condensate. The calculations are compared known results experimental studies which, when detonating an acetylene-oxygen mixture a pipe closed at one end, is obtain nanoscale particles from material special properties. It assumed that melting point such lower than and about 3100 K. Only adjustment temperature, best agreement (with accuracy 3 %) was obtained between calculated dependence front velocity on molar fraction acetylene mixture.
منابع مشابه
Determination of melting point of polycaprolactones under carbon dioxide pressure
Solid-Liquid-Gas equilibrium of poly-(ε-caprolactone) – carbon dioxide systems at high pressure has been determined by visual determination of the first melting point using a static apparatus. Measurements have been performed with poly-(ε-caprolactones) of three different molecular weights: 4000 g/mol, 10000 g/mol and 25000 g/mol. The determined SLG equilibrium lines show a temperature maximum ...
متن کاملNanosized Carbon Particles From Natural Gas Soot
Carbon nanoparticles were prepared by refluxing the combustion soot of natural gas in nitric acid. Transmission ElectronMicroscopymeasurements showed that the resulting particles exhibited an average diameter of 4.8( 0.6 nm, and the crystalline lattices were consistent with graphitic carbons. CNMRand FTIR spectroscopic measurements further confirmed the presence of sp carbons in the form of ary...
متن کاملGas Detonation Forming by a Mixture of H2+O2 Detonation
Explosive forming is one of the unconventional techniques in which, most commonly, the water is used as the pressure transmission medium. One of the newest methods in explosive forming is gas detonation forming which uses a normal shock wave derived of gas detonation, to form sheet metals. For this purpose a detonation is developed from the reaction of H2+O2 mixture in a long cylindrical detona...
متن کاملDiamond patterns in the cellular front of an overdriven detonation.
A nonlinear integral-differential equation describing the cellular front of an overdriven detonation is obtained by an analysis carried out in the neighborhood of the instability threshold. The analysis reveals both an unusual mean streaming motion, resulting from the rotational part of the oscillatory flow, and pressure bursts generated by the crossover of cusps representative of Mach stems pr...
متن کاملPicosecond Dynamics Behind the Shock Front
Understanding the microscopic details of shock-wave initiation of energetic materials requires a realistic picture of picosecond time scale processes occurring in large molecules located in an -100 nanometer thin layer just behind the front. In this paper, I discuss a theoretical model for shock wave induced chemistry which highlights the role of molecular mechanical energy transfer processes, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: ????????? ?????????? ??????
سال: 2022
ISSN: ['2541-9447']
DOI: https://doi.org/10.25205/2541-9447-2021-16-2-59-70