Simulation of high-lift wake behavior
Abstract
Transport aircraft performance is strongly influenced by the effectiveness of the high-lift system. Wakes subjected to strong adverse pressure gradients in high-lift systems can thicken very rapidly, limiting maximum lift. A combined experimental and computational investigation has been conducted to evaluate performance of several turbulence models in simulating this type of flow. In the experiment, a turbulent wake was subjected to adverse pressure gradients in a symmetric diffuser. LDV surveys, pressure measurements, and flow visualization were used to investigate the physics of this decelerated wake, through the onset of wake reversal. Navier-Stokes calculations were also performed for a flat plate wake in a two-dimensional diffuser. For diffuser angles similar to the experiment, the calculations under-predicted wake growth and failed to demonstrate wake reversal.
Degree
Ph.D.
Advisors
Sullivan, Purdue University.
Subject Area
Aerospace materials
Off-Campus Purdue Users:
To access this dissertation, please log in to our
proxy server.