Different from the literature in this study, effects of curvature and area distribution on S-Shaped subsonic diffuser performance were computationally investigated using
In this work, effects of curvature and area distribution on S-shaped subsonic diffuser performance are computationally investigated with commercially available flow solver Fluent.
Keywords: S-Shaped subsonic diffuser, engine intake, CFD, fluent.
The weak shock produces a small disturbance in the flow behind the shock wave, the next important solution of oblique shock waves are strong oblique shock waves, if normal shock waves created over the wedge, the tremendous changes in the physical quantities in the ahead and behind the shock wave and within the ramjet subsonic diffuser and also heat transfer occur in a non-equilibrium state.
Interaction of shock wave should be consider to further design of the subsonic diffuser of the ramjet engine.
Figure 1 shows that each flow path includes "preinlet" surface, compression ramp, throat, and subsonic diffuser. The principal shock system is generated by the compression ramp integrated into the rim of the rotor.
It consists of "preinlet" flow path, compression ramp, throat, subsonic diffuser, and straight flow path.
The points A, B, C, and D are located in the middle part of the compression ramp, the entrance of the throat, entrance of subsonic diffuser, and the entrance of straight flow path, respectively.
As the inlet back pressure is increased at the engine face, compression waves are emitted upstream into the subsonic diffuser
. With each subsequent wave sent, the static temperature rises, driving up the sonic velocity.