Chemical Laser Studies.
Final rept. 1 Feb 71-30 Jun 75,
WISCONSIN UNIV MADISON DEPT OF CHEMICAL ENGINEERING
Pagination or Media Count:
Pressure limits of detonations in hydrogen-chlorine and hydrogen-chlorine-40 argon mixtures were established experimentally. At 300 K no mixture of hydrogen, chlorine and argon could be detonated below 16 torr. Replacement of excess hydrogen with argon considerably lowered the pressure limits. Replacement of excess chlorine with argon had the reverse effect. A method was proposed to predict pressure limits, if a limit for one mixture composition and the variation of the characteristic blast wave radius for the detonation with system pressure and composition is known. Measured detonation velocities were all significantly above the theoretical Chapman-Jouget velocities. Although most of the detonations were overdriven, a significant portion of the differences between experimental and theoretical velocities is due to only a partial thermodynamic equilibrium at the detonation end state. Detonations in hydrogen-chlorine and hydrogen-chlorine-argon mixtures exhibited an irregular tridimensional structure on the soot records. The cell size decreased with pressure.
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