Accession Number:

ADA379331

Title:

Effects of Large-Droplet Ice Accretion on Airfoil and Wing Aerodynamics and Control

Descriptive Note:

Final rept.

Corporate Author:

ILLINOIS UNIV AT URBANA DEPT OF AERONAUTICAL AND ASTRONAUTICAL ENGINEERING

Personal Author(s):

• Bragg, Michael B.
• Loth, Eric

Report Date:

2000-04-01

Pagination or Media Count:

195.0

Abstract:

An integrated experimental and computational investigation was conducted to determine the effect of simulated ridge ice shapes on airfoil aerodynamics. These upper-surface shapes are representative of those which may form aft of protected surfaces in super-cooled large droplet conditions. The simulated ice shapes were experimentally tested on a modified National Advisory Committee for Aeronautics NACA 23012 23012m airfoil and Natural Laminar Flow NLF 0414 airfoil at Reynolds numbers of 1.8 million for a range of protuberance locations, sizes, and shapes. The computational study investigated the cases encompassed by the experimental study but in addition included higher Reynolds numbers and other airfoils from the NASA Commuter Airfoil Program.

Descriptors:

• *ICE FORMATION
• *AERODYNAMICS
• *AERODYNAMIC CONTROL SURFACES
• AIR FLOW
• TURBULENCE
• TURBULENT BOUNDARY LAYER
• WIND TUNNEL TESTS
• AERODYNAMIC DRAG
• NAVIER STOKES EQUATIONS
• LAMINAR FLOW
• PRESSURE DISTRIBUTION
• AERODYNAMIC LIFT
• REYNOLDS NUMBER
• LAMINAR BOUNDARY LAYER
• AIRCRAFT PROTUBERANCES

Subject Categories:

• Aerodynamics
• Snow, Ice and Permafrost

Distribution Statement:

APPROVED FOR PUBLIC RELEASE