Noise Reduction Performance of Aerodynamic Tabs in a Supersonic Jet

Aerodynamic Performance of Fan-Flow Deflectors for Jet-Noise Reduction

This paper presents a computational study on the aerodynamic effectiveness of vane-type fan-flow deflectors used for reducing jet noise from a supersonic turbofan exhaust with bypass ratio of 2.7. The numerical code solved the three-dimensional Reynolds-averaged Navier–Stokes equations. A series of nozzle configurations using deflector vanes of variable number, airfoil section, azimuthal mounti...

The Reduction of Supersonic Jet Noise Using Pulsed

Mach Wave Noise of a Supersonic Jet

Supersonic jets emit noise to the outside in form of Mach waves which are long, straight and have about equal angles. Experiments done by Oertel sen. visualized clearly these Mach waves and he publicized moreover that such Mach waves exist also inside the jet. Experimental and theoretical studies in the past did not allow a complete understanding of the phenomenon up to now, wherefore the need ...

Multilevel Shape Parameterization for Aerodynamic Optimization – Application to Drag and Noise Reduction of Transonic/supersonic Business Jet

We present the construction and report on the experimentation of a shapeoptimization method applied to the aerodynamic design of a transonic or supersonic business jet. The main numerical ingredients are: a 3D unstructured-grid compressible-flow finite-volume solver, free-form deformation approach for shape and mesh movement based on self-adaptive and multilevel 3D tensorial Bézier polynomial r...

Summary of "Supersonic Jet and Rocket Noise"