Shock wave studies of the pyrolysis of fluorocarbon oxygenates. I. The thermal dissociation of C3F6O and CF3COF

2017 ◽  
Vol 19 (4) ◽  
pp. 3151-3158 ◽  
Author(s):  
C. J. Cobos ◽  
K. Hintzer ◽  
L. Sölter ◽  
E. Tellbach ◽  
A. Thaler ◽  
...  
Keyword(s):  
Shock Wave ◽  
Thermal Decomposition ◽  
Shock Waves ◽  
Thermal Dissociation ◽  
Hexafluoropropylene Oxide ◽  
Subsequent Decomposition

The thermal decomposition of hexafluoropropylene oxide, C3F6O, to perfluoroacetyl fluoride, CF3COF, and CF2 has been studied in shock waves in Ar between 630 and 1000 K. The subsequent decomposition of CF3COF has been followed between 1400 and 1900 K.

scholarly journals Shock wave study and theoretical modeling of the thermal decomposition of c-C4F8

2015 ◽  
Vol 17 (48) ◽  
pp. 32219-32224 ◽  
Author(s):  
C. J. Cobos ◽  
K. Hintzer ◽  
L. Sölter ◽  
E. Tellbach ◽  
A. Thaler ◽  
...  
Keyword(s):  
Shock Wave ◽  
Thermal Decomposition ◽  
Shock Waves ◽  
Thermal Dissociation ◽  
Theoretical Modeling ◽  
Uv Absorption

The thermal dissociation of octafluorocyclobutane, c-C4F8, was studied in shock waves over the range 1150–2300 K by recording UV absorption signals of CF2.

Shock wave studies of the pyrolysis of fluorocarbon oxygenates. II. The thermal dissociation of C4F8O

2017 ◽  
Vol 19 (4) ◽  
pp. 3159-3164 ◽  
Author(s):  
C. J. Cobos ◽  
K. Hintzer ◽  
L. Sölter ◽  
E. Tellbach ◽  
A. Thaler ◽  
...  
Keyword(s):  
Shock Wave ◽  
Thermal Decomposition ◽  
Shock Waves ◽  
Thermal Dissociation

The thermal decomposition of octafluorooxalane, C4F8O, to C2F4 + CF2 + COF2 has been studied in shock waves in Ar between 1300 and 2200 K. Two pathways were identified.

scholarly journals Shock wave and modelling study of the dissociation pathways of (C2F5)3N

2019 ◽  
Vol 21 (19) ◽  
pp. 9785-9792
Author(s):  
C. J. Cobos ◽  
K. Hintzer ◽  
L. Sölter ◽  
E. Tellbach ◽  
A. Thaler ◽  
...  
Keyword(s):  
Shock Wave ◽  
Thermal Decomposition ◽  
Shock Waves ◽  
Modelling Study

The thermal decomposition of perfluorotriethylamine, (C2F5)3N, was investigated in shock waves by monitoring the formation of CF2.

scholarly journals Shock wave and modelling study of the unimolecular dissociation of Si(CH3)2F2: an access to spectroscopic and kinetic properties of SiF2+

2021 ◽  
Author(s):  
Jurgen Troe ◽  
Carlos J Cobos ◽  
Lars Soelter ◽  
Elsa Tellbach
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Thermal Dissociation ◽  
Uv Absorption ◽  
Kinetic Properties ◽  
Unimolecular Dissociation ◽  
Absorption Time ◽  
Time Profiles ◽  
Reaction Proceeds ◽  
Modelling Study

The thermal dissociation of Si(CH3)2F2 was studied in shock waves between 1400 and 1900 K. UV absorption-time profiles of its dissociation products SiF2 and CH3 were monitored. The reaction proceeds...

scholarly journals Shock wave and modelling study of the dissociation kinetics of C2F5I

2021 ◽  
Vol 23 (7) ◽  
pp. 4394-4403
Author(s):  
C. J. Cobos ◽  
L. Sölter ◽  
E. Tellbach ◽  
J. Troe
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Thermal Dissociation ◽  
Uv Absorption ◽  
Reaction Products ◽  
Dissociation Kinetics ◽  
Kinetics Of ◽  
Modelling Study

The thermal dissociation of C2F5I was studied in shock waves monitoring UV absorption signals from the reactant C2F5I and later formed reaction products such as CF, CF2, and C2F4.

Shock wave and modeling study of the reaction CF4 (+M) ⇔ CF3 + F (+M)

2016 ◽  
Vol 18 (26) ◽  
pp. 17592-17596 ◽  
Author(s):  
Gary Knight ◽  
Lars Sölter ◽  
Elsa Tellbach ◽  
Jürgen Troe
Keyword(s):  
Shock Wave ◽  
Thermal Decomposition ◽  
Shock Waves ◽  
Temperature Range ◽  
Modeling Study

The thermal decomposition of CF4 (+Ar) → CF3 + F (+Ar) was studied in shock waves over the temperature range 2000–3000 K. The experiments were shown to correspond to the central part of the falloff curve.

Investigation of shock-wave deformation history from recovered structure

1986 ◽  
Vol 44 ◽  
pp. 434-435
Author(s):  
M.A. Mogilevsky ◽  
L.S. Bushnev
Keyword(s):  
Shock Wave ◽  
Plastic Deformation ◽  
Dislocation Density ◽  
Shock Waves ◽  
Shock Front ◽  
Single Crystals ◽  
Residual Deformation ◽  
Deformation Structure ◽  
Deformation History ◽  
Deformation Velocity

Single crystals of Al were loaded by 15 to 40 GPa shock waves at 77 K with a pulse duration of 1.0 to 0.5 μs and a residual deformation of ∼1%. The analysis of deformation structure peculiarities allows the deformation history to be re-established.After a 20 to 40 GPa loading the dislocation density in the recovered samples was about 1010 cm-2. By measuring the thickness of the 40 GPa shock front in Al, a plastic deformation velocity of 1.07 x 108 s-1 is obtained, from where the moving dislocation density at the front is 7 x 1010 cm-2. A very small part of dislocations moves during the whole time of compression, i.e. a total dislocation density at the front must be in excess of this value by one or two orders. Consequently, due to extremely high stresses, at the front there exists a very unstable structure which is rearranged later with a noticeable decrease in dislocation density.

Features of spatial shock-wave flows in vapor-gas-liquid mixtures

2014 ◽  
Vol 10 ◽  
pp. 27-31
Author(s):  
R.Kh. Bolotnova ◽  
U.O. Agisheva ◽  
V.A. Buzina
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Shock Waves ◽  
Liquid Mixture ◽  
Liquid Mixtures ◽  
Pressure Vessels ◽  
Water Mixture ◽  
Two Dimensional ◽  
Nonstationary Processes ◽  
Two Phase

The two-phase model of vapor-gas-liquid medium in axisymmetric two-dimensional formulation, taking into account vaporization is constructed. The nonstationary processes of boiling vapor-water mixture outflow from high-pressure vessels as a result of depressurization are studied. The problems of shock waves action on filled by gas-liquid mixture volumes are solved.

scholarly journals Nematic Dispersive Shock Waves from Nonlocal to Local

2021 ◽  
Vol 11 (11) ◽  
pp. 4736
Author(s):  
Saleh Baqer ◽  
Dimitrios J. Frantzeskakis ◽  
Theodoros P. Horikis ◽  
Côme Houdeville ◽  
Timothy R. Marchant ◽  
...  
Keyword(s):  
Shock Wave ◽  
Liquid Crystals ◽  
Shock Waves ◽  
Numerical Solutions ◽  
Wave Structure ◽  
Beam Power ◽  
Input Beam ◽  
Shock Wave Structure ◽  
Wave Solutions ◽  
Modulation Theory

The structure of optical dispersive shock waves in nematic liquid crystals is investigated as the power of the optical beam is varied, with six regimes identified, which complements previous work pertinent to low power beams only. It is found that the dispersive shock wave structure depends critically on the input beam power. In addition, it is known that nematic dispersive shock waves are resonant and the structure of this resonance is also critically dependent on the beam power. Whitham modulation theory is used to find solutions for the six regimes with the existence intervals for each identified. These dispersive shock wave solutions are compared with full numerical solutions of the nematic equations, and excellent agreement is found.

scholarly journals Equation of state studies at SILP by laser-driven shock waves

1996 ◽  
Vol 14 (2) ◽  
pp. 157-169 ◽  
Author(s):  
Yuan Gu ◽  
Sizu Fu ◽  
Jiang Wu ◽  
Songyu Yu ◽  
Yuanlong Ni ◽  
...  
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Equation Of State ◽  
Shock Waves ◽  
Target Surface ◽  
Shock Adiabats ◽  
Pressure Shock ◽  
Aluminum Target ◽  
Laser Illumination ◽  
The Stability

The experimental progress of laser equation of state (EOS) studies at Shanghai Institute of Laser Plasma (SILP) is discussed in this paper. With a unique focal system, the uniformity of the laser illumination on the target surface is improved and a laser-driven shock wave with good spatial planarity is obtained. With an inclined aluminum target plane, the stability of shock waves are studied, and the corresponding thickness range of the target of laser-driven shock waves propagating steadily are given. The shock adiabats of Cu, Fe, SiO2 are experimentally measured. The pressure in the material is heightened remarkably with the flyer increasing pressure, and the effect of the increasing pressure is observed. Also, the high-pressure shock wave is produced and recorded in the experimentation of indirect laser-driven shock waves with the hohlraum target.

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