"Variable cycle engines." . . "Heat shielding." . . "Nozzle design." . . . . "Acoustic measurement." . . "Free jet feasibility study of a thermal acoustic shield concept for AST/VCE application" . "Free jet feasibility study of a thermal acoustic shield concept for AST/VCE application"@en . . . . . . . . . . . . . . . . . . . . . "Free-jet feasibility study of a thermal acoustic shield concept for AST/VCE application dual stream nozzles : comprehensive data report" . "Free-jet feasibility study of a thermal acoustic shield concept for AST/VCE application dual stream nozzles : comprehensive data report"@en . "Geometry." . . "Aerodynamic forces." . . "Jet aircraft noise." . . "Feasibility analysis." . . "Suppressors." . .