2003年3月1日 · As the leading-edge vortex travels downstream, the core of the vortex makes an abrupt kink and forms a spiral vortex. The spiral vortex was also observed by Fisher et al. …

To better understand the purpose of this fence and the leading edge extension, we first need to take a step back and discuss an aerodynamic device called the vortex generator. As described …

The approach to the problem was to use flow visualisation techniques in a water tunnel and in a wind tunnel to examine the detailed behaviour of the flow in the vicinity of the LEX fence. The …

You're correct that the leading edge extension (LEX) plays an important part in increasing the maximum angle of attack of the Hornet/Super Hornet. The LEX basically forms a vortex above …

flow-field observations and available in-flight flow vi-sualizations on the NASA F-18 HARV. Experimental results from other F/A-18 model tests conducted by McDonnell Douglas and …

1991年12月1日 · The wind tunnel results were correlated with in-flight flow visualizations and handling qualities trends obtained by NASA using an F-18 High-Alpha Research Vehicle …

Vortex-flow aerodynamics pertains to understanding the interaction of concentrated vortices with aircraft components. Modern Reynolds-Averaged Navier-Stokes (RANS) technology is useful to...

Vortex generators are typically used in a series to create a number of small vortices over a large portion of wing. Leading edge root extensions produce a single strong vortex near the wing …

Therefore, this investigation was undertaken to study in detail the dynamic effects of pitch rate on the LEX vortex development and bursting on the 2% scale model of the F/A- 18 fighter aircraft. …

surface pressures, and extensive flow visualization. Reference 34 by Banks also investigates the baseline F/A-18 with a 16%-scale F/A-18 data as well as forebody vortex control data. There …