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Development of a large-scale, outdoor, ground-based test capability for evaluating the effect of rain on airfoil liftA large-scale, outdoor, ground-based test capability for acquiring aerodynamic data in a simulated rain environment was developed at the Langley Aircraft Landing Dynamics Facility (ALDF) to assess the effect of heavy rain on airfoil performance. The ALDF test carriage was modified to transport a 10-ft-chord NACA 64210 wing section along a 3000-ft track at full-scale aircraft approach speeds. An overhead rain simulation system was constructed along a 525-ft section of the track with the capability of producing simulated rain fields of 2, 10, 30, and 40 in/hr. The facility modifications, the aerodynamic testing and rain simulation capability, the design and calibration of the rain simulation system, and the operational procedures developed to minimize the effect of wind on the simulated rain field and aerodynamic data are described in detail. The data acquisition and reduction processes are also presented along with sample force data illustrating the environmental effects on data accuracy and repeatability for the 'rain-off' test condition.
Document ID
19930017710
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Bezos, Gaudy M. (NASA Langley Research Center Hampton, VA, United States)
Campbell, Bryan A. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1993
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-4420
L-17004
NAS 1.15:4420
Accession Number
93N26899
Funding Number(s)
PROJECT: RTOP 505-68-01-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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