Problems related to influence of wind on sprinkler sprays are wind drift, amount of evaporation loss, variation in the sprinkling region, etc. As a consequence, geometric pattern form is influenced by these effects directly. The wind condition near the earth's surface is turbulent flow and vary with time. On the other hand, the author introduced the concept of mean wind velocity and theoretically calculated the geometric pattern form of a single sprinkler. Some of the calculated data were compared with the experimental data and the accuracy of the theoretical calculation were confirmed.
1) On flat field
a) On the assumption that the wind velocity is the same as the average wind, the author considered the case of a velocity profile according to logarithmic law.
b) Previous calculated data were used for the calculation of the geometric pattern form of a single sprinkle on flat field under a windy condition.
c) The calculated geometric pattern form shows a shift to the wind direction according to the wind speed.
2) On inclined field
a) On the assumption that the wind velocity is the same as the average wind, the author considerd a case of. uniform velocity distribution.
b) The wind direction is assumed to be parallel to the earth's surface and the
x direction. And, the following equations are obtained in the
x,
y and
zdirections:
_??_(5)
_??_(6)
_??_(7)
c) The calculated results show the characteristic geometric pattern form of a single sprinkler on an inclined field under a windy condition.
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