Patent ID: 6390418
Filing Date: 2002-05-21
Classification: B64C,F15D,Y02T

Abstract:
A gas flow system, comprising:a gas flow path adjacent a surface, gas flowing within said path having a boundary layer adjacent said surface; a chamber; a gas pressure oscillation generator for providing gas in said chamber having significant oscillatory pressure components at substantially a selected frequency; and a gas passage interconnecting said chamber with said gas flow path, said passage directed into said flow at a small acute angle with respect to said surface so that said chamber, said gas pressure oscillation generator, and said passage form a tangential acoustic jet of which said passage forms the nozzle, to provide a stream of high momentum flux gas particles substantially tangentially into said boundary layer which causes, in a region downstream of said nozzle, substantially steady streamline flow with said boundary layer absolutely attached to said surface; and wherein said frequency is selected to provide predetermined mass flow into and out of said chamber, as a function of the physical parameters of said chamber, said nozzle and said gas pressure oscillation generator.