Experimental Study on Cylindrical and Spherical Implosions

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Cylindrically and spherically imploding detonation waves in a stoichiometric propane-oxygen mixture, produced in vessels of about 40 cm internal diameter having different convergent spaces, were experimentally investigated by applying a radially divergent detonation. The experimental results have shown that the ratio of the pressure P behind the imploding detonation waves to the initial mixture pressure P. is related to the radial distance γ from the implosion center to the detonation front approximately as follows : P/P_<0∝γ>^<-0.5> for the cylindrical implosion, P/P_<0∝γ>^<-1.0> for the spherical implosion in a conical space, and P/P_<0∝γ>^<-1.5> for the spherical implosion in a parabolic space. The pressure increase with the propagation of the imploding detonation is in every case higher than the theoretical one.
社団法人応用物理学会の論文
1983-03-20