Accession Number:

AD1096599

Title:

Vortex Dynamics and Boundary Layer Characteristics of Airfoils with Surface Modifications

Descriptive Note:

Technical Report,15 Jul 2014,14 Jul 2018

Corporate Author:

University of Texas- Rio Grande Valley EDINBURG United States

Personal Author(s):

Report Date:

2019-08-16

Pagination or Media Count:

68.0

Abstract:

An experimental study is conducted to investigate the aerodynamic and flow field characteristics of a NACA-0010 airfoil with and without leading-edge tubercles in flow with freestream turbulence intensity of 4 percent. Preliminary measurements of wake velocity profiles, force measurements using a six-component force balance and Particle Image Velocimetry PIV flow field measurements were carried out. The measurements were carried out for two types of airfoils, one with smooth leading edge baseline and the other with modified leading-edge by introducing tubercles. All the experiments were carried out at Reynolds numbers ranging from 160,000 to 412,000. The results from this study show that in the range of Reynolds numbers tested for the half-span airfoil model, while there is no performance enhancement pre-stall, significant performance enhancement is achieved for stall and post-stall conditions.

Subject Categories:

  • Fluid Mechanics
  • Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE