GLTRS--Glenn
TITLE AND SUBTITLE:
A Study of Large Droplet Ice Accretion in the NASA Lewis IRT at Near-Freezing Conditions; Part 2

AUTHOR(S):
Harold E. Addy, Jr., Dean R. Miller, and Robert F. Ide

REPORT DATE:
April 1997

FUNDING NUMBERS:
WU-505-68-10

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-10668

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, DC 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-107424

SUPPLEMENTARY NOTES:
Prepared for the International Conference on Aircraft Inflight Icing sponsored by the Federal Aviation Administration, Springfield, Virginia, May 6-8, 1996. Harold E. Addy, Jr. and Dean R. Miller, NASA Lewis Research Center; Robert F. Ide, Army Research Laboratory, Vehicle Propulsion Directorate, NASA Lewis Research Center. Responsible person, Harold E. Addy, Jr., organization code 2720, (216) 977-7467.

ABSTRACT:
Results of experiments designed to determine the effects of large droplet ice accretion on a NACA 23012 wing section are presented. Using primarily an icing condition with a median volumetric diameter droplet size of 160mm and a liquid water content of 0.82 grams per cubic meter, the effects of various air temperatures, angles of attack, and de-icer boot cycle interval times on ice accretion were studied. Measurements of aerodynamic performance penalties due to the ice accretions were made. Results were also compared with similar tests conducted with a Twin Otter wing section in Part 1 of this study. The form of the ice from the large droplet cloud varied as a function of air total temperature; particularly at the near-freezing temperatures of 28°F to 34°F. Changing boot cycle interval time did not prevent formation of an ice ridge. The most detrimental aerodynamic effects occurred at an air total temperature of 28°F.

SUBJECT TERMS:
Large droplet; Ice accretion; Near-freezing

NUMBER OF PAGES:
13

PDF AVAILABLE FROM URL:
1997/TM-107424.pdf
(620,672 KB)
This page contains an Adobe® Acrobat® Reader PDF file. The PDF documents have been created to show thumbnails of each page. If the thumbnails do not display properly, download the file to the hard drive and view through Acrobat® Reader. You can download Acrobat® Reader for free. click

NASA NASA GLTRS--Glenn

A service of the NASA Glenn Research Center Logistics and Technical Information Division

Suggestions or questions about this site can be directed to:

NASA official: Technical Publications Manager, Sue.E.Butts@nasa.gov

Web curator: Caroline.A.Rist@grc.nasa.gov

Privacy Policy and Important Notices