DETONATION INITIATION IN COMBUSTIBLE GAS MIXTURE UPON INTERACTION OF A SHOCK WAVE WITH AN INERT GAS BUBBLE

2020 ◽  
Author(s):  
P. YU. GEORGIEVSKIY ◽  
Keyword(s):  
Shock Wave ◽  
Molar Mass ◽  
Inert Gas ◽  
Gas Mixture ◽  
Riemann Solver ◽  
Perfect Gas ◽  
Type Method ◽  
Combustible Gas ◽  
Combustible Gas Mixture ◽  
Second Order Of Approximation

On the basis of the Euler equations for a perfect gas with an inhomo-geneous distribution of molar mass, the interaction of a shock wave in a combustible gas with an elliptic bubble of an inert gas of elevated density is simulated in planar two-dimensional (2D) formulation. Various values of the Mach number M of the incident wave and the ratio of bubble axles are considered. A finite-volume Godunov-type method of the second order of approximation with HLLC (Harten-Lax-van Leer Contact) Riemann solver is used for numerical simulation. The combustion reaction of the gas mixture is modeled using the two-stage Korobeynikov-Levin kinetics.

Effect of composition of a combustible gas mixture on the parameters of a plane shock wave generated by an explosion in air

1984 ◽  
Vol 20 (1) ◽  
pp. 82-84 ◽  
Author(s):  
A. P. Voitov ◽  
B. E. Gel'fand ◽  
S. A. Gubin ◽  
V. N. Mikhalkin ◽  
V. A. Shargatov
Keyword(s):  
Shock Wave ◽  
Plane Shock Wave ◽  
Gas Mixture ◽  
Plane Shock ◽  
Combustible Gas ◽  
Combustible Gas Mixture

scholarly journals Детонация горючей газовой смеси при взаимодействии ударной волны с эллиптической областью тяжелого инертного газа

2021 ◽  
Vol 47 (9) ◽  
pp. 21
Author(s):  
П.Ю. Георгиевский ◽  
В.А. Левин ◽  
О.Г. Сутырин
Keyword(s):  
Incident Shock ◽  
Inert Gas ◽  
Average Intensity ◽  
Gas Combustion ◽  
Gas Detonation ◽  
Type Method ◽  
Combustible Gas ◽  
Direct Initiation ◽  
Intensity Wave ◽  
Second Order Of Approximation

On the basis of the Euler equations, the interaction of a shock wave in a combustible gas with an elliptical bubble of an inert gas of increased density is numerically simulated within a plane two-dimensional formulation. The finite-volume Godunov-type method of the second order of approximation is applied. Gas combustion is modeled using the Korobeinikov-Levin two-stage kinetics. Various values of the Mach number of the incident wave and the elongation of the inert bubble are considered, and the refraction and focusing of the incident shock are described. Qualitatively different regimes of gas detonation initiation have been found, including direct initiation by a strong wave, ignition upon reflection of an average-intensity wave from the gas interface, and upon focusing of secondary shock waves at lower shock Mach numbers. The dependence of the ignition mode on the shock intensity and the shape of the bubble is determined.

Autotrophic biosynthesis of polyhydroxyalkanoate by Ralstonia eutropha from non-combustible gas mixture with low hydrogen content

2020 ◽  
Vol 42 (9) ◽  
pp. 1655-1662 ◽  
Author(s):  
Yuki Miyahara ◽  
Masahiro Yamamoto ◽  
Romeo Thorbecke ◽  
Shoji Mizuno ◽  
Takeharu Tsuge
Keyword(s):  
Hydrogen Content ◽  
Ralstonia Eutropha ◽  
Gas Mixture ◽  
Combustible Gas ◽  
Combustible Gas Mixture

Explosion of a bubble curtain with a combustible-gas mixture under the action of a pressure pulse

2003 ◽  
Vol 48 (2) ◽  
pp. 75-79 ◽  
Author(s):  
R. I. Nigmatulin ◽  
V. Sh. Shagapov ◽  
I. K. Gimaltdinov ◽  
F. F. Akhmadulin
Keyword(s):  
Pressure Pulse ◽  
Gas Mixture ◽  
Combustible Gas ◽  
Combustible Gas Mixture ◽  
Bubble Curtain

Improvement of efficiency of the solar-assisted production of a combustible gas mixture from biomass

2015 ◽  
Vol 51 (4) ◽  
pp. 322-327 ◽  
Author(s):  
O. M. Salamov ◽  
A. A. Garibov ◽  
K. D. Sultanova
Keyword(s):  
Gas Mixture ◽  
Combustible Gas ◽  
Combustible Gas Mixture

scholarly journals On detonation of gaseous mixtures of acetylene and of pentance

1927 ◽  
Vol 114 (767) ◽  
pp. 137-151 ◽  
Keyword(s):  
Detonation Wave ◽  
Atmospheric Pressure ◽  
Gas Mixture ◽  
Gaseous Mixtures ◽  
Uniform Rate ◽  
Combustible Gas ◽  
Combustible Gas Mixture

If a combustible gas at atmospheric pressure is ignited near one end of a tube and the rate of supply of heat by combustion is greater than the loss by radiation and conduction, the progress of the flame will be rapidly accelerated. Of a sudden, detonation may occur. A detonation wave travels forward at a nearly uniform rate, combustion proceeding simultaneously and a “ retonation ” wave travels back through the burnt gases from the “ position of detonation " The discovery of the detonation wave by Berthelot and the researches of Mallard and Le Chatelier and of Dixon thereon are matters of history. The purpose of the work described in this communication was to find the position at which a burning mixture of gases would develop a detonation wave under certain fixed conditions. The influence on such position of a change of strength of the combustible gas mixture and then of the nature of the diluent gas was studied. The effect of the addition of small quantities of certain “ antiknock ” compounds has also been investigated.

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