Growth mechanisms of a turbulent spot
Hairpin-like vortices have been identified as the dominant coherent flow structures in transitional and turbulent boundary layers and free shear layers. To better understand the characteristics of these flows, it is important to study the creation and growth mechanisms of the hairpin vortices and the resultant wave packets containing multiples of these flow structures. A turbulent spot in […]
Mixing mechanisms in an axisymmetric lobed mixer
Due to steadily-increasing pressure from the public and from air-traffic regulators, aircraft and engine manufacturers are aggressively researching methods for reducing the level of noise of aircraft during landing and take-off. Generally, exhaust noise reduction is achieved by mixing the high-speed exhaust stream with the lower-speed bypass stream exiting the engine. A lobed mixer enhances […]