Visualization and Quantification of Rotor Tip Vortices in Helicopter Flows

Speaker: David Kao, Computational Technologies Branch, NASA Ames Research Center
March 31, 2015

Presentation

Abstract

This work presents an automated approach for extraction, visualization, and quantification of vortex core radii from the Navier-Stokes simulations of a UH-60A rotor in forward flight. We adopt a scaled Q criterion to determine vortex regions and then perform vortex core profiling in these regions to calculate vortex core radii. In particular, the vortex core radii are displayed graphically in a plane using a new color map scheme. This method represents an efficient way of visualizing and quantifying rotorcraft vortical flow fields.

Biography

David Kao is a researcher in the Computational Technologies Branch of the NASA Advanced Supercomputing (NAS) Division at NASA Ames Research Center. His research focuses on scientific visualization, numerical flow visualization, and computer graphics. He has won several NASA Group Achievement Awards, NASA Ames Honor Awards, and NASA Space Act Award for the software code Unsteady Flow Analysis Toolkit (UFAT). He has served as an associate editor for the IEEE Transactions on Visualization and Computer Graphics and as a co-chair of the IS&T/SPIE Visualization and Data Analysis Conference. David obtained his Ph.D. in Computer Science from the Arizona State University.

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