Jet Mixing Characteristics of Ventilated Chevron Nozzles
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Abstract
This article presents the numerical investigation on jet mixing characteristics of ventilated chevron nozzles. The ventilations provided at the root of the chevron petal are called root ventilated chevron nozzle and the ventilation provided at the tip of the chevron petal is called tip ventilated chevron nozzle. To measure the jet mixing effectiveness of the root ventilated and tip ventilated nozzles, the results were compared with the plain chevron nozzle without ventilation. Total pressure decay profiles and turbulent kinetic energy profiles along the jet axis were studied for all the cases of the jet. The reduction in the core for the root and tip ventilated chevron nozzle when compared to the plain chevron nozzle is 21.5% and 14.4%. Radial total pressure profiles at different axial locations of the jet and total pressure contours were also studied. From the pressure profiles and contours, it is evident that root ventilated chevron nozzle enhances the mixing, when compared to other chevron configurations. The mixed size vortices generated from the root ventilated chevron edges are more capable to enhance the mixing when compared to other cases.
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