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Photogrammetric Frost Roughness Measurements in Cold-Soaked Conditions
Technical Paper
2019-01-1970
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Cold-soaked fuel frost (CSFF) is a form of aircraft wing contamination that occurs when a vehicle caries sufficient fuel for multiple trips or take-offs and landings. Following the first trip, which may reach altitudes above 10,000 m (33,000 ft), the fuel for the subsequent trips is carried in the wing tanks and may reach temperatures below -25 °C. In certain times of the year at some airports, temperatures and humidity levels will form CSFF on the aircraft wing surfaces over the fuel tanks. Unless an exemption is granted for the specific aircraft model, aircraft are not allowed to takeoff if the wing surfaces are contaminated by frost. Because aircraft operators desire to minimize vehicle time spent at airports, aircraft manufacturers are expected to pursue designs that safely operate with CSFF at takeoff and to pursue certification exemptions for aircraft models enabling CSFF takeoffs. To assist manufacturers in the design of future aircraft and to assist regulators in evaluating certification exemption requests, more information about frost roughness characteristics and evolution in CSFF conditions is required. However, because of the material and optical properties of frost, measuring CSFF properties using traditional roughness measurement presents challenges. For this investigation, a photogrammetric approach based on “structure-from-motion” algorithms traditionally employed in aerial surveying was developed to characterize the evolution of CSFF roughness. Using the approach, measurements of frost roughness evolution were performed in the Baylor Frost Tunnel (BFT) for two basic air temperature, humidity, surface temperature, and velocity conditions with frost time up to two hours. An analysis of variance approach was used to determine the sensitivity frost growth rates to the environmental conditions. The resulting measurements demonstrate different evolution histories with air velocity and air temperature being the most important factors governing roughness growth.
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Miyauchi, T., McClain, S., Zhang, T., O'Neal, D. et al., "Photogrammetric Frost Roughness Measurements in Cold-Soaked Conditions," SAE Technical Paper 2019-01-1970, 2019, https://doi.org/10.4271/2019-01-1970.Data Sets - Support Documents
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References
- Ljungstroem , B.L.G. 1968
- Dietenberger , M.A. 1983
- Ranter , H. ASN Aircraft Accident Canadair CL-600-2B16 Challenger 604 N90AG Birmingham International Airport (BHX) http://aviation-safety.net/database/record.php?id=20020104-0
- Jackson , M. 2016
- Boeing Inc.
- Lawrysyn , M. Aerodynamic Characteristics of Frost Roughness Carleton University 1989 157
- Yun , R. , Kim , Y. , and Min , M. Modeling of Frost Growth and Frost Properties with Airflow over a Flat Plate International Journal of Refrigeration 25 3 362 371 2002
- Lee , S. , Broeren , A. , Kreeger , R. E. , Potapczuk , M. , and Utt , L. 2014
- Broeren , A. , Lee , S. , and Monsastero , M. 2014
- Kreeger , R.E. and Tsao , J. 2014
- Linder , W. Digital Photogrammetry: Theory and Applications New York; Berlin Springer 2003
- Schenk , T. 2005
- Vosselman , G. and Maas , H.-G. Airborne and Terrestrial Laser Scanning Whittles Publishing 2010
- Hariharan , P. Optical Interferometry Academic Press 2003
- Collier , P. , Dixon , L. , Fontana , D. , Payne , D. , and Pearson , A.w. The Use of Close Range Photogrammetry for Studying Ice Accretion on Aerofoil Sections The Photogrammetric Record 16 94 671 684 1999
- Soinne , E. , Rosnell , T. , and Viljanen , N. 2017
- Koivisto , P. 2015
- Dooley , J.B. 2010
- Flack , K.A. and Schultz , M.P. Review of Hydraulic Roughness Scales in the Fully Rough Regime Journal of Fluids Engineering 132 4 041203 2010
- Freund , R.J. and Wilson , W.J. Statistical Methods Second San Diego Academic Press 1997
- Wu , X. , Dai , W. , Xu , W. , and Tang , L. Mesoscale Investigation of Frost Formation on a Cold Surface Experimental Thermal and Fluid Science 31 1043 1048 2007