Validation Results for LEWICE 2.0

TITLE AND SUBTITLE:
Validation Results for LEWICE 2.0

AUTHOR(S):
William B. Wright and Adam Rutkowski

REPORT DATE:
January 1999

FUNDING NUMBERS:
WU-548-20-23-00
NAS3-98022

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
Dynacs Engineering Company, Inc.
2001 Aerospace Parkway
Brookpark, Ohio 44142

PERFORMING ORGANIZATION REPORT NUMBER:
E-11479

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

REPORT TYPE AND DATES COVERED:
Final Contractor Report

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA CR-1999-208690

SUPPLEMENTARY NOTES:
Background data available on CD-ROM from the NASA Center for Aerospace Information or the first author. William B. Wright, Dynacs Engineering Company, Inc., (216) 433-2161; Adam Rutkowski, Case Western Reserve University, University Circle, Cleveland, Ohio 44106. Project Manager, Thomas H. Bond, Turbomachinery and Propulsion Systems Division, NASA Lewis Research Center, organization code 5840, (216) 433-3900.

ABSTRACT:
A research project is underway at NASA Lewis to produce a computer code which can accurately predict ice growth under any meteorological conditions for any aircraft surface. This report will present results from version 2.0 of this code, which is called LEWICE. This version differs from previous releases due to its robustness and its ability to reproduce results accurately for different spacing and time step criteria across computing platform. It also differs in the extensive amount of effort undertaken to compare the results in a quantified manner against the database of ice shapes which have been generated in the NASA Lewis Icing Research Tunnel (IRT). The results of the shape comparisons are analyzed to determine the range of meteorological conditions under which LEWICE 2.0 is within the experimental repeatability. This comparison shows that the average variation of LEWICE 2.0 from the experimental data is 7.2% while the overall variability of the experimental data is 2.5%.

SUBJECT TERMS:
Aircraft icing

NUMBER OF PAGES:
680

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