Analytical results obtained through gas dynamics relations are conventionally used to generate preliminary designs of scramjet intakes. Ramp type configurations (mixed compression type) are common among scramjet intake geometries. These are known to produce adequate trust with minimum length/weight. However, There is a scope for improvement in Total pressure recovery. The Busemann intakes have been shown to have much larger total pressure recovery values, thus being more efficient.
In present work, we take a two-ramp mixed compression scramjet intake designed for freestream Mach number 6.5 satisfying shock-on-lip condition. The isolator Mach number is 3.12 with a total pressure recovery of 0.52. A range of Busemann intakes are designed for the same free stream and isolator Mach numbers and varying truncation angles. The Busemann intake with truncation angle of 60
is considered for further analysis based on length and total pressure recovery criteria. The analytical results along with numerical simulations are compared for ramp-type and Busemann intakes