Abstract
We measure concentrations of reactive species near the turbulent / non-turbulent (T/NT) interface in a planar liquid jet with a second-order chemical reaction (A + B → R), and investigate the characteristics of chemical reaction and mixing near the T/NT interface. Reactants A and B are premixed into the jet flow and the ambient flow, respectively. We use the optical fiber probe based on the light absorption spectrometry to measure the concentrations of reactive species. We focus on the two interfaces perpendicular to the streamwise direction, which are referred to as leading edge and trailing edge. We derive the conditional statistics conditioned on the distance from the interface. The results show that the conditional mean concentrations and chemical reaction rate have drastic change near the T/NT interface, and the changes near the leading edge are larger than those near the trailing edge.
