Thickness of the Stationary Detonation Wave in a Mixture of Oxyhydrogen Gas with Nitrogen

Abstract

In the experiment, the length of the detonation wave is usually determined by the duration of the luminescence of the OH radical, which corresponds to the zone of intense heat release. It is believed that the length of this zone is of the order of the longitudinal size of the detonation cell. In theory, the distance from the shock front of the wave to the Chapman -Jouguet point, in which the relative velocity of the gas is equal to the local speed of sound, is taken as the detonation thickness. The question arises about the possibility of introducing a coefficient of proportionality between these quantities, which would facilitate the comparison of experimental results and the theory of stationary detonation waves. This paper compares the experimental and calculated data on the length of detonation waves in mixtures of oxyhydrogen gas (2H2 + O2) with nitrogen. It is shown that the introduction of the coefficient of proportionality between the length of the detonation wave and the zone of intense heat generation is impractical (see figure below).