Experimental Study on Dynamics of 2H$_{\mathrm{2}}$/O$_{\mathrm{2}}$/2Ar Detonations with a Constant Mass Divergence

Very recently, Borzou and Radulescu (2016) formulated a novel solution allowing for an easy and precise quantification of loss effects during detonation propagation involving an exponentially shaped channel. ~They found that the detonation dynamics departed from the ZND model predictions, particularly for very unstable detonations. ~The question arises if the ZND model can predict the dynamics of much less unstable mixtures, in spite of the presence of a cellular structure. ~The present study focuses on a more stable mixture of 2H$_{\mathrm{2}}$/O$_{\mathrm{2}}$/2Ar with better known reaction kinetics.~The results obtained experimentally for the velocity deficit in terms of the amount of mass divergence were found in excellent agreement with the predictions made with the ZND model, in spite of the detonation reaction zone being organized in strong cellular structures with reactive transverse waves. ~