Investigation of the gasdynamic stability of a detonation wave in a gas mixture

1967 ◽  
Vol 3 (3) ◽  
pp. 66-70
Author(s):  
S. K. Aslanov
Keyword(s):  
Detonation Wave ◽  
Gas Mixture ◽  
Gasdynamic Stability

A Contribution to the Theory of the Development and Stability of Detonation in Gases

1952 ◽  
Vol 19 (1) ◽  
pp. 63-71
Author(s):  
A. K. Oppenheim
Keyword(s):  
Detonation Wave ◽  
Cross Section ◽  
Combustion Zone ◽  
Gas Mixture ◽  
Constant Cross Section ◽  
Combustion System ◽  
Adequate Explanation ◽  
System A

Abstract The development of detonation of an explosive gas mixture contained in a constant-cross-section duct is analyzed on the basis of a unidimensional, gasdynamic treatment of a double-discontinuity combustion system. A steady and an unsteady system are considered, and it is shown that the latter yields an adequate explanation of the effect of coalition of the two discontinuities on the establishment and subsequent stability of the detonation wave. The locus of states behind the detonating combustion zone during the development of the process is determined and analyzed.

120 Influence of Amount of Driver Gas Mixture on Promotion of Detonation Wave Propagation

2006 ◽  
Vol 2006.45 (0) ◽  
pp. 39-40
Author(s):  
Shigetoshi SUGATA ◽  
Masashi WAKITA ◽  
Ryusuke NUMAKURA ◽  
Harunori NAGATA ◽  
Tsuyoshi TOTANI
Keyword(s):  
Wave Propagation ◽  
Detonation Wave ◽  
Gas Mixture ◽  
Driver Gas ◽  
Detonation Wave Propagation

scholarly journals Explosion waves and shock waves III-The initiation of detonation in mixtures of ethylene and oxygen and of carbon monoxide and oxygen

1935 ◽  
Vol 152 (876) ◽  
pp. 418-445 ◽  
Author(s):  
William Payman ◽  
H. Titman ◽  
Jocelyn Field Thorpe
Keyword(s):  
Shock Wave ◽  
Carbon Monoxide ◽  
Shock Waves ◽  
Detonation Wave ◽  
Wave Speed ◽  
Gas Mixtures ◽  
Gas Mixture ◽  
And Shock Waves ◽  
Long Run ◽  
Detonating Gas

This series of papers has so far dealt mainly with non-maintained or partially maintained atmospheric shock waves, and only incidentally with the fully maintained "detonation" wave. It is generally accepted that the detonation wave in an explosive gas mixture is a shock wave produced by the rapid combustion of the mixture, sufficiently intense to cause almost instantaneous ignition of the gas through which it passes, and continuous maintained by the combustion thereby started. An account of some preliminary experiments, using the "wave-speed" camera to record the movement of the flame and of the invisible shock waves in front of the flame in gas mixtures prior to detonation, has already been given by one of us. Those experiments related mainly to hydrogen-oxygen and methane-oxygen mixtures whose aptitude to detonate may be regarded as moderate, for the continuation of the work, mixtures with oxygen have again been used, but a more readily detonating gas, ethylene, was chosen. Experiments were also made with carbon monoxide, because the flame usually requires a comparatively long run before detonation is established. These two gases have the advantage, not shared by hydrogen and methane, that their predetonation flames are sufficiently actinic for good records to be obtained by direct photography for comparison with corresponding "wave-speed" records. All gas mixtures used were saturated with water vapour.

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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