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KMID : 1059519860300040394
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Journal of the Korean Chemical Society
1986 Volume.30 No. 4 p.394 ~ p.402
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Detonation Characteristics of L. P. G / O2 Gas Mixture and the Self-Ignition Condition for the Formation of Detonative Wave
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Choi Sung-Nak
Shim Kyu-Sun
Kim Un-Sik
Yun Sock-Sung
Kim Ung
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Abstract
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Detonation reaction in L.P.G./O2 mixture gas has been investigated over the L.P.G. concentration range of 3∼45 volume%. The variation of detonation velocity with mixture ratio is very interesting as it shows and inflection point near at the stoichiometric ratio. This might be ascribed to the fact that the detonation reactions at fuel-rich condition and fuel-lean condition proceed via different mechanisms. The maximum detonation velocity of 2.65km/sec occurs not at stoichiometric ratio(Φ=1) but at fuel-rich condition (Φ=1.57). Assuming that a stable detonation wave must propagates with the constant velocity, The upper and lower limit of detonation were determined and found to be 40.0 and 3.40 L.P.G. volume% respectively. The shock-heating technique was also utilized for the measurement of self-ignition temperature onsetting a stable detonation wave at varous mixture ratios. The self-ignition temperature at stoichiometric ratio is 742±3oK and the self-ignition temperature increases as the mixture ratio deviates from the stoichiometric condition.
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