• Mr. Anandakumar Doddamani
• Dr. N K S Rajan
• Dr. Shivashankar M

The design of supersonic intakes ensuring maximum performance is a highly challenging task for engineers. The present study includes a systematic design methodology and geometric optimization for a three-ramp, mixed compression supersonic rectangular intake at M∞=2.2 operation. In this work, we have followed the on-design condition to estimate the three ramp angles for maximum total pressure recovery. Then numerical simulations are carried out for the preliminary design at different exit blockage ratio to obtain the complete performance characteristics. The numerical simulation (computational fluid dynamics) model comprise of shear stress transport with two equation k-ω turbulence model and advection scheme. The results show a MFR of 0.963 for the preliminary design at super-critical operation. It is observed from the 2D results, the design with cowl opening angle of 10 degree, cowl height of 6 mm without accounting the effect of side plate has 3.79% of the improved mass flow rate through the inlet and it has more uniform flow at the throat section. We have observed from 3D results that, the swept side plate shock bends the ramp shocks upstream resulting in reduced velocity, followed by a separation bubble that blocks the isolator inlet. Finally, we concluded that the mass flow rate highly influenced by shock-shock, shock-boundary layer interaction and flow separation.

"Design and Performance Analysis of Rectangular Ramjet Intake At Mach 2.2", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.388-396, June 2019, Available :http://www.jetir.org/papers/JETIR1906Z56.pdf

"Design and Performance Analysis of Rectangular Ramjet Intake At Mach 2.2", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp388-396, June 2019, Available at : http://www.jetir.org/papers/JETIR1906Z56.pdf