The water-drop like shape to circular shape transition hypersonic inward turning inlet has been designed with the technology of streamline tracing and gradual change section

using an axisymmetric basic flowfield with controllable pressure rising distribution.Numerical simulations were conducted on both design point and translation point

and the comparison of performance was performed with the rectangular to circular shape transition inward turning inlet with the same design parameters.The results indicate that two types of inward turning inlet have the roughly equivalent general performance

while the water-drop like shape intake has a more uniform exit flowfield and a better starting characteristic.Furthermore

the flowfiled structure of water-drop like shape intake is asymmetric due to the asymmetric geometry shapes.