Engine inlet with blown air drag reduction

摘要

An air intake system (10) for a turbo engine, wherein external engine boundary layer separation drag and external engine friction drag may be selectively reduced. A first air exit port (16) in the form at a plurality of air exit jets (30) is in fluid communication with air inlet pores (28) and noise reduction cells (24) for reduction in boundary layer separation drag. A second air exit port (18) in the form of air exit pores (32) is in fluid communication with air inlet pores (28) and noise reduction cells (24) for reduction in external engine friction drag. A control device (20) uses input from engine drag sensing device (36) and environmental sensing device (38) to respectively control air flow to air exit jets (30) and air exit pores (32) with first port valve (40) and second port valve (42).