Dual Injection in Supersonic Crossflow: Analysis Jet Shear Layer from Schlieren Images

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 continuous air-indraft wind tunnel at Mach number 1.55. A schlieren setup been used for visualizing flow features. largely automated algorithm processing images developed determine location upper boundary layer. penetration studied function 1) , ratio momentum and that crossflow, 2) dimensionless distance between dual-jets. An empirical similarity relation established time-averaged layer covering investigated conditions (, ). This provides spacing maximal jets .