A Study on the Effect of Wind Fences in Reducing Wind Velocity at Fruit Farms

Abstract:

Fruit growers install wind fences to prevent fruits from dropping. To examine the effect of wind fences in reducing wind velocity, this study conducted a performance experiment, a farmhouse model experiment, and analyzed how wind fences reduce wind velocity. Among the four types of wind fence with porosities ranging between 30% and 60%, the one with a porosity of 40% showed the highest performance. Findings from the reduced model experiment that used a wind tunnel showed that wind fences with a porosity of over 50% had a wind velocity reduction effect. In addition, the experiment found that the wind velocity reduction rate is affected by the installation distance of the wind fence.

• Periodical: Advanced Materials Research (Volumes 919-921)
• Pages: 1667-1673
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.919-921.1667
• Online since: April 2014
• Authors: Jang Youl You, Ki Pyo You, Sun Young Paek, Young Moon Kim*
• Keywords: Porosity, Velocity, Wind Fences

References

[1] Perera, M.D.A.E.S., Shelter behind two-dimensional solid and porous fences, J. Wind Eng. Ind. Aerodynamic. 8, p.93~180, (1981).

DOI: 10.1016/0167-6105(81)90010-6

[2] Ranga, R.K.G., Garde, R.J., Singh, S.K., Singth, N., Experimental study on characteristics of flow past porous fences, J Wind Eng Ind Aerodynamic. 29, pp.155-163, (1988).

DOI: 10.1016/0167-6105(88)90154-7

[3] Lee, S.J., Kim, H.B., Laboratory measurements of velocity and turbulence filed behind porous fences, J Wind Eng. Ind. Aerodynamic. 80, p.311~326, (1999).

DOI: 10.1016/s0167-6105(98)00193-7

[4] Park, C.W., Lee, S.J., The effects of bottom gap and non-uniform porosity in a wind fence on the surface pressure of a triangular prism located behind the fence, J. Wind Eng. Ind. Aerodynamic. 89, pp.1137-1154, (2001).

DOI: 10.1016/s0167-6105(01)00105-2

[5] Loeffler, A.E., Gordon, A.M., Gillespie, T.J. Optical porosity and wind speed reduction by coniferous windbreaks in southern Ontario, Agroforest System Vol. 17, p. pp.119-133, (1992).

DOI: 10.1007/bf00053117

[6] Schwartz, R.C., Fryrear, D.W., Harris, B.L., Bilbro, J.D., Juo, A.S.R. Mean flow and shear stress distributions as influenced by vegetative windbreak structure, Agricultural and Forest Meteorology Vol. 75., pp.1-22, (1995).

DOI: 10.1016/0168-1923(94)02206-y

[7] Durst, F., Rastogi, Turbulent Flow over Two-Dimensional Fences, Turbulence Shear Flow 2 Berlin Springer-Verlag . pp.219-231, (1979).

[8] Judd, M. j., Raupach, M.R., Fininigan, J.J., A wind tunnel study of turbulent flow around single and multiple wind break, part I : velocity fields, Bounday-Leyer Meteorol. 80, pp.127-165, (1996).

DOI: 10.1007/bf00119015

[9] Plate, E.J., The aerodynamic of shelter belts. Agric. Meteorol. 8, pp.203-222, (1971).

[10] Raine, J.K., Stevenson, D.C., Wind protection by model fences in a simulated atmospheric boundary layer, J. Wind Eng. Ind. Aerodynamic. 2, pp.159-180, (1977).

DOI: 10.1016/0167-6105(77)90015-0

[11] Subhas, C., Yaragal, H.S., Govinda, R., Murthy, K.K., An experimental investigation of flow fields downstream of solid and porous fences, J. Wind Eng. Ind. Aerodynamic. 66, pp.127-140, (1997).

DOI: 10.1016/s0167-6105(97)00015-9