Abstract

A Perkin-Elmer Model 83 Monochromator covering a spectral range from the ultraviolet to 5.5μ is used for determining the light intensity as a function of time of an explosion in a bomb. [ Bullock, Hornbeck, and Silverman, J. Chem. Phys. 18, 1114 ( 1950)]. The radiation entering the spectrometer is chopped to allow ac amplification of the detector output with provision to allow transmission as well as emission measurements. A frequency modulated pressure gauge is used to determine the pressure change in the bomb. Time resolution of the order of magnitude of 10−3 sec may be obtained for both spectral and pressure observations. Results for typical carbon monoxide-oxygen explosions are shown. These preliminary results seem to indicate that there is equilibrium for approximately 0.02 sec after the flame front reaches the vessel wall.

© 1953 Optical Society of America

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References

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  1. Lewis and von Elbe, Combustion, Flames and Explosions (Academic Press, Inc., New York, 1951).
  2. B. W. Bullock and S. Silverman, J. Opt. Soc. Am. 40, 608 (1950).
    [Crossref]

1950 (1)

Bullock, B. W.

Lewis,

Lewis and von Elbe, Combustion, Flames and Explosions (Academic Press, Inc., New York, 1951).

Silverman, S.

von Elbe,

Lewis and von Elbe, Combustion, Flames and Explosions (Academic Press, Inc., New York, 1951).

J. Opt. Soc. Am. (1)

Other (1)

Lewis and von Elbe, Combustion, Flames and Explosions (Academic Press, Inc., New York, 1951).

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Figures (8)

F. 1
F. 1

Block diagram of the bomb and associated recording equipment.

F. 2
F. 2

Schematic drawing of the ellipsoidal image reducer.

F. 3
F. 3

Circuit diagram of the detector amplifier. [Parts list is on p. 611 of reference 3.]

F. 4
F. 4

Block diagram of the pressure gauge and its associated equipment.

F. 5
F. 5

Emission of an explosion for the CO2 combination band region at 2μ. Solid line-pressure. Modulated trace-light intensity. A−4CO+O2. B−2CO+O2. C−CO+O2. D−CO+2O2.

F. 6
F. 6

Emission of an explosion for the CO2 combination bands at 2.8μ. Solid line-pressure. Modulated trace-light intensity. A−4CO+O2. B−2CO+O2. C−CO+O2. D−CO+2O2.

F. 7
F. 7

Transmission of an explosion for a stoichiometric mixture, 2CO+O2. A−4.8μ (CO). B−2.8μ (CO2).

F. 8
F. 8

Variation of observed and calculated temperature with time, for an explosion of a stoichiometric mixture of CO and O2.