Numerical studies have been carried out using a validated two-dimensional standard k-omega turbulence model for the design optimization of a thrust vector control system using shock induced self-impinging supersonic secondary double jet. Parametric analytical studies have been carried out at different secondary injection locations to identifying the highest unsymmetrical distribution of the mai...

The response of a supersonic cavity to open-loop forcing with a pulsed-blowing actuator is explored experimentally. It is shown that excitation at frequencies near the Rossiter modes are amplified, while frequencies between the first two Rossiter modes are attenuated. The results clearly demonstrate that the Rossiter modes in the supersonic cavity are weakly damped (not self-excited) modes. The...

In supersonic-combustion ramjets (scramjets), fuel is injected, which should mix rapidly with the supersonic crossflow to minimize length of scramjet. Tandem dual-jet injection has shown improved mixing performance over single-jet injection. However, experiments on tandem have not addressed jet shear layer, in occurs, yet. The present study investigates as well bow shocks front jets, a continuo...

Numerical simulations have been carried out for a supersonic three-dimensional rectangular arc nozzle, where secondary flow toward the center of curvature occurs due to shape nozzle. It is known that causes longitudinal vortices form near wall nozzle corner, making outlet unstable and induces loss transport energy. When working fluid condensable gas with relatively large latent heat such as moi...

Background: Few studies have investigated the association between sugar intake and insulin dynamics in children, and none have examined this association in overweight Latino youth. Objective: We aimed to examine the relation between dietary components, especially sugar intake, and insulin dynamics in overweight Latino youth. Design: We examined 63 overweight Latino children aged 9–13 y. Dietary...