High-speed turbulent flow over a scramjet encounters flow-separation due to shock-boundary layer interaction. The variation in separation bubble size with respect to various canonical parameters and the effect of separation bubble on Lift and Drag of the intake for different practical parameters is studied in detail. The scramjet intake is simulated for free-stream conditions corresponding to M 1 = 6 at z =30 km and changes in separation bubble size is studied by varying canonical parameters like ramp angle, wall-temperature, Mach number and Reynolds number along with practical parameters like altitude, flight Mach number, ramp length and angle of attack. The well-validated shock-unsteadiness turbulence model is used for the simulations.