Abstract
Equations are established for the pressure increase as a function of time for the self-decomposition of tetrafluoroethylene (TFE) for both a uniform tube and a sphere. The resting gas is locally ignited at one end of the tube and in the center of the sphere respectively. Buoyancy is ignored. Due to the low κ-value, major simplifications are justifiably introduced. Apart from the geometrical factors, the pressure increase as a function of time is solely controlled by the pressure increase ratio, Π, and the intrinsic flame speed, vo, thus the equations also are applicable to other gaseous TFE-mixtures of technical interest. The average flame speed is 0.1–0.3 m/s, which compares well with other explosive gaseous mixtures, and vo lies in the range of the molecular diffusion rate. The self-decomposition of TFE does not seem to exhibit any specific patterns.
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