Patent ID: 8333076
Filing Date: 2012-12-18
Classification: B64C,B64D,F02C,F02K,F05D,Y10T

Abstract:
1. A method of making a supersonic inlet of a jet powered airplane, said airplane designed for flight at a specific and pre-determined Mach number, comprising: providing an inlet comprising a compression ramp and cowl; said cowl having an upstream lip; said compression ramp having an upstream straight compression ramp having an apex, connected downstream with a concave surface relative to the flow, said concave surface connected downstream with a straight surface; providing said apex with an angle and positioning said cowl lip such that at said Mach number, an inclined shock wave generated at said apex hits said cowl lip; at said Mach number, said cowl lip producing a terminal shock wave extending to the compression surface; providing said concave surface with a radius of concavity producing successive shocklets; said radius of concavity being larger than a radius that at said Mach number would cause said shocklets to focus on said cowl lip; at said Mach number, each of said shocklets intercepting said terminal shock wave at a different location between said cowl lip and said compression surface.