The effects of rime ice on horizontal axis wind turbine performance were estimated. For typical supercooled fog conditions found in cold northern regions, four rime ice accretions on the S809 wind turbine airfoil were predicted using the NASA LEWICE code. The resulting airfoil/ice profile combinations were wind tunnel tested to obtain the lift, drag, and pitching moment characteristics over the Reynolds number range 1−2 × 106. These data were used in the PROPID wind turbine performance prediction code to predict the effects of rime ice on a 450-kW rated-power, 28.7-m diameter turbine operated under both stall-regulated and variable-speed/variable-pitch modes. Performance losses on the order of 20 percent were observed for the variable-speed/ variable-pitch rotor. For the stall-regulated rotor, however, a relatively small rime ice profile yielded significantly larger performance losses. For a larger 0.08c-long rime ice protrusion, however, the rated peak power was exceeded by 16 percent because at high angles the rime ice shape acted like a leading edge flap, thereby increasing the airfoil Cl,max and delaying stall.

1.
Bragg, M. B., Gregorek, G. M., and Shaw, R. J., 1982, “Wind Tunnel Investigation of Airfoil Performance Degradation Due to Icing,” AIAA Paper 82-0582, Mar.
2.
Bragg, M. B., Cummings, M. J., Lee, S., and Henze, C. M., 1996, “Boundary-Layer and Heat-Transfer Measurements on a Airfoil with Simulated Ice Roughness,” AIAA Paper 96-0866, Jan.
3.
Bose
N.
,
1992
a, “
Icing on a Small Horizontal Axis Wind Turbine—Part 1: Glaze Ice Profiles
,”
J. of Wind Engineering and Industrial Aerodynamics
, Vol.
45
, pp.
75
85
.
4.
Bose
N.
,
1992
b, “
Icing on a Small Horizontal Axis Wind Turbine—Part 2: Three Dimensional Ice and Wet Snow Formations
,”
J. of Wind Engineering and Industrial Aerodynamics
, Vol.
45
, pp.
87
96
.
5.
Chappell, M. S., and Templin, R. J., 1985, “And the Cold Winds Shall Blow … Wind Energy Research and Development in Canada—Spring 1985,” Proceedings of the 7th British Wind Energy Association Conference, Oxford, UK.
6.
Hansman, R. J., 1993, “Microphysical Factors which Influence Ice Accretion,” Proceedings of the First Bombardier International Workshop on Aircraft Icing/Boundary-Layer Stability and Transition, L. Paraschivoiu, ed., Ecole Polytechnique, Montreal, Quebec, Canada, Sept. 20–21, pp. 86–103.
7.
Jones, B. M., 1936, “The Measurement of Profile Drag by the Pitot Traverse Method,” Aeronautical Research Council, R&M 1688.
8.
Makkonen, L., and Autti, M., 1991, “The Effects of Icing on Wind Turbines,” Proceedings of the European Community Wind Energy Conference, Amsterdam, Netherlands.
9.
McCormick, B. W., 1995, Aerodynamics, Aeronautics, and Flight Mechanics, 2nd Ed., John Wiley and Sons, Inc., New York.
10.
Noe, S. C., 1996, “Force Balance Measurements of Wind-Turbine Airfoil Performance with Simulated Leading-Edge Ice Accretions,” Master’s thesis, University of Illinois at Urbana-Champaign, Urbana, IL, Aug.
11.
Olsen, W., and Walker, E., 1986, “Experimental Evidence for Modifying the Current Physical Model for Ice Accretion on Aircraft Surfaces,” NASA TM-87184, Lewis Research Center, Cleveland, OH.
12.
Rong, J. Q., and Bose, N., 1990, “Power Reduction from Ice Accretion on a Horizontal Axis Wind Turbine,” Proceedings of the 12th British Wind Energy Association Conference, Norwich, UK, Mar. 27–30.
13.
Rong
J. Q.
,
Bose
N.
,
Brothers
C
, and
Lodge
M
.,
1991
, “
Icing Test on a Horizontal Axis Wind Turbine
,”
Wind Engineering
, Vol.
15
, No.
2
, pp.
109
113
.
14.
Ronsten, G., 1993, “Can Delayed Stall Be Caused by Ice Accretion on the Leading Edge of an Airfoil?,” FFA Institute of Sweden, FFAP-A-981, Stockholm, Sweden, May.
15.
Ruff, G., 1990, “Users Manual for the NASA Lewis Ice Accretion Prediction Code (LEWICE),” NASA CR-185129, May.
16.
Schlichting, H., 1979, Boundary-Layer Theory, 7th Ed; McGraw-Hill, New York.
17.
Seifert, H., and Schloz, C., 1990, “Additional Loads Caused by Ice on Rotor Blades During Operation,” Proceedings of the European Community Wind Energy Conference, Madrid, Spain, Sept. 10–14.
18.
Seifert, H., 1992, “Icing of Wind Turbine Rotor Blades During Operation,” presented at BOREAS, An International Expert’s Meeting on Wind Power in Icing Conditions, Enontekio¨, Finland.
19.
Selig
M. S
., and
Tangler
J. L.
,
1995
, “
Development and Application of a Multipoint Inverse Design Method for Horizontal Axis Wind Turbines
,”
Wind Engineering
, Vol.
19
, No.
2
, pp.
91
105
.
20.
Somers, D. M., 1989, “Design and Experimental Results for the S809 Airfoil,” Airfoils, Inc., Hampton, VA, Mar.
21.
Tammelin, B., and Santti, K., 1992, “Rime Accretions on the Fells,” presented at BOREAS, An International Expert’s Meeting on Wind Power in Icing Conditions, Enontekio¨, Finland.
22.
Tangler, J. L., and Somers, D. M., 1995, “NREL Airfoil Families for HAWTs,” Proceedings of the American Wind Energy Association WINDPOWER Conference, Washington, D.C., Mar.
23.
Ramsay, R. R., Hoffmann, M. J., and Gregorek, G. M., 1994, “Effects of Grit Roughness and Pitch Oscillation on the S809 Airfoil,” Draft Report of The Ohio State University, Aeronautical and Astronautical Research Laboratory, Columbus, OH, National Renewable Energy Laboratory Contract No. XF-1-11009-3, June.
24.
Wright, W. B., and Potapczuk, M. G., 1996, “Computational Simulation for Large Droplet Icing,” Proceedings of the FAA Interational Conference on Aircraft Inflight Icing, Vol. II, Report No. DOT/FAA/AR-96/81, II, Aug., pp. 545–555.
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