New Injector Geometry for Penetration Enhancement of Perpendicular Jet into Supersonic Flow

Computational Simulation of Scramjet Combustors - A Comparison between Quasi-One Dimensional and 2-D Numerical Simulations

“…Approximately 60 percent gain was obtained in penetration height with the use of stringer shaped injector as compared to circular injector but the penetration performance was obtained only at low jet-to-freestream dynamic pressure ratio unlike circular nozzle injector [59].…”

“…Also, adding sweepback and a moderate yaw angle to the sweepback, greatly enhanced the penetration depth obtained using diamond-shaped injector, which is unlikely in the case of a circular injector [58]. Hirano, et al [59] studied fuel injection from various orifice shapes, namely, circular, diamond, wedge, arrowhead, rectangular and stringer. Following conclusions were drawn:…”

“…Various numerical and experimental studies have been performed on fuel injection through orifices with sharp leading edges, such as diamond or wedge shaped orifice [58][59][60]. Timioka, et al [58], performed experimental studies of the plume formed by sonic injection from a diamond-shaped orifice into a Mach 3 crossflow.…”

Study of Forebody Injection and Mixing with Application to Hypervelocity Airbreathing Propulsion

“…In this speed regime, significant experimental attention has been paid toward the evaluation of perpendicular wall injection, 2 near-parallel injection concepts (e.g. swept ramp injectors), 3,4 transpiration/effusive injection cooling for transverse injection, 5 and the effect of fuel injector nozzle geometry on mixing characteristics [6][7][8] . The use of cavities for injection and flameholding has also been a subject of past research.…”

“…relative force of blowing), 2 the geometry of the jet itself (e.g. disturbance to the crossflow), 7,20 and the angle of injection. The dynamic pressure ratio is bounded by maximum fuel system pressure and the desire to produce an underexpanded plume.…”