Study of Flow Field inside a Rectangular Air Intake with Pointed Cowl for Different Back Pressures at Mach 2.2

Abstract

Computations and Experiments were performed to get an understanding of the flow field around a rectangular supersonic air intake with pointed cowl [90˚] at different back pressures for Mach 2.2. The effect of Cowl shape on the ramp surface pressure distribution is discussed and compared with existing V-Notch [90˚] intake model at free exit condition. It was found that using pointed cowl [90˚] intake model, a better pressure recovery was achieved compared to the V-Notch [90˚] intake model at Mach 2.2. Both Pointed and V-Notch intake models showed good starting characteristics. For change in back pressure, the occurence of normal shock, flow separation zone and flow reversal were observed. All experiments are performed only for the Pointed cowl [90˚] intake model. All the 3-D computations were performed by using software available at B.I.T, Mesra, Ranchi.