NASA Contractor Report 4257 DOT/FAA/CT 87/22 An Experimental Method for Measuring Water Droplet Impingement Efficiency on Two- and Three-Dimensional Bodies M. Papadakis, R. Elangonan, G.A. Freund, Jr., M. Breer, G.W. Zumwalt, and L. Whitmer Document Availability Change Notice This document was published in November 1989 with a restriction. It was changed March 2005 to Unclassified/Unlimited per DAA modified March 30, 2005. For U.S. Government Agencies and U S Government Agency Contractors Only GRANT NAG3 566 NOVEMBER 1989 National Aeronautics and Space Administration
NASA Contractor Report 4257 DOT/FAA/CT 87/22 An Experimental Method for Measuring Water Droplet Impingement Efficiency on Two- and Three-Dimensional Bodies M. Papadakis Wichita State University Wichita, Kansas R. Elangonan, G.A. Freund, Jr., and M. Breer Boeing Military Airplanes Wichita, Kansas G.W. Zumwalt Wichita State University Wichita, Kansas L. Whitmer Boeing Military Airplanes Wichita, Kansas Document Availability Change Notice This document was published in November 1989 with a restriction. It was changed March 2005 to Unclassified/Unlimited per DAA modified March 30, 2005. Prepared for For U.S. Government Agencies and U.S. Government Agency Contractors Only Lewis Research Center and the Federal Aviation Administration under Grant NAG3 566 National Aeronautics and Space Administration
DOCUMENT AVAILABILITY CHANGE NOTICE NASA Contractor Report 4257 An Experimental Method for Measuring Water Droplet Impingement Efficiency on Two- and Three-Dimensional Bodies M. Papadakis, R. Elangonan, G.A. Freund, Jr., M. Breer, G.W. Zumwalt, and L. Whitmer November 1989 This document was published in November 1989 with a restriction. It was changed March 2005 to Unclassified/Unlimited per DAA modified March 30, 2005. Per the STI Program Office and Code I at HQ, you may modify copies in your possession. The restriction notice on the cover, title page and RDP should be boldly crossed out and the above statement printed clearly above or below it. Glenn Research Center Publishing Services Coordination Office 216 433 3207
REPORT DOCUMENTATION PAGE Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503. 1. AGENCY USE ONLY (Leave blank) 4. TITLE AND SUBTITLE 6. AUTHOR(S) 2. REPORT DATE November 1989 An Experimental Method for Measuring Water Droplet Impingement Efficiency on Two- and Three-Dimensional Bodies M. Papadakis, R. Elangonan, G.A. Freund, Jr., M. Breer, G.W. Zumwalt, and L. Whitmer 3. REPORT TYPE AND DATES COVERED Form Approved OMB No. 0704-0188 Final Contractor Report 5. FUNDING NUMBERS WU 505 68 11 NAG3 566 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Wichita State University Aerospace Engineering Department Wichita, Kansas 67260 0044 8. PERFORMING ORGANIZATION REPORT NUMBER E 4971 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio 44135 3191 and Federal Aviation Administration, Technical Center Atlantic City International Airport, New Jersey 08405 10. SPONSORING/MONITORING AGENCY REPORT NUMBER NASA CR 4257 DOT/FAA/CT 87/22 11. SUPPLEMENTARY NOTES Prepared under Interagency Agreement DTFA03 81 A 00209 with the FAA Technical Center. M. Papadakis and G.W. Zumwalt, Wichita State University, Wichita, Kansas 67260 0044 (work funded by NASA Grant NAG3 566); R. Elangonan, G.A. Freund, Jr., M. Breer, and L. Whitmer, Boeing Military Airplanes, Wichita, Kansas. Project Managers, Colin S. Bidwell and Robert J. Shaw, Turbomachinery and Propulsion Systems Division, organization code RTI, 216 433 3947; and James T. Riley, Federal Aviation Administration, Technical Center, 609 485 4144. 12a. DISTRIBUTION/AVAILABILITY STATEMENT Document Availability Change Notice 12b. DISTRIBUTION CODE This document was published in November 1989 with a restriction. It was changed March 2005 to Unclassified/Unlimited per DAA modified March 30, 2005. For U.S. Government Agencies and U S Government Agency Contractors Only Unclassified - Unlimited Subject Category 03 Available electronically at http://gltrs.grc.nasa.gov This publication is available from the NASA Center for Aerospace Information, (301) 621 0390. 13. ABSTRACT (Maximum 200 words) An experimental method has been developed to determine the water droplet impingement characteristics on two- and three-dimensional bodies. The experimental results provide the essential droplet impingement data required to validate water droplet trajectory codes, which are used in the analysis of aircraft icing. A body, whose water droplet impingement characteristics are required, is covered at strategic locations by thin strips of moisture absorbing (blotter) paper, and is exposed to an air stream containing a water-dye solution spray cloud. Water droplet impingement data are extracted from the dyed blotter strips by measuring the optical reflectance of the dye deposit on the strips, using an automated reflectometer. Models tested include a 4-inch-diameter cylinder, a NACA 652015 airfoil section, a MS(1) 0317 supercritical airfoil section, three simulated ice shapes, an axisymmetric inlet and a Boeing 737 300 inlet model. Detailed descriptions of the dye-tracer technique, instrumentation, data reduction method and the results obtained are presented in this report. Analytical predictions of collection efficiency characteristics for most test configurations are included for comparison. 14. SUBJECT TERMS Trajectory code validation; Water droplet trajectories; Experimental trajectory data; Impingement characteristics; Impingement data; Experimental impingement data; Trajectory codes 17. SECURITY CLASSIFICATION OF REPORT 18. SECURITY CLASSIFICATION OF THIS PAGE 19. SECURITY CLASSIFICATION OF ABSTRACT Unclassified Unclassified Unclassified 15. NUMBER OF PAGES 399 16. PRICE CODE 20. LIMITATION OF ABSTRACT NSN 7540-01-280-5500 Standard Form 298 (Rev. 2-89) Prescribed by ANSI Std. Z39-18 298-102