動力噴霧機の改良に関する研究 (第4報)

薬液粒子の運動量およびエネルギについて

抄録

In this report, We studied the momentum and energy on sprayed particle of agricultural chemicals by motor sprayer.
The first, we took that the spreading diameters of the particle to each fall distance from nozzle, spreading angles on nozzle tip to each fall distance, discharge of agricultural chemicals from nozzles on each spraying pressures, and mean diameters of spraying particles on each nozzles were fig 2, fig 3, fig 4 and fig 5.
The other, we calculated the formula of displacement, velosity, momentum and energy on sprayed particle used by stokes' theorem, as follow—
x=(γ_p-γ_a)d_p²/18μt+d_p²γ_p/18μg
[Vcosθ-(γ_p-γ_a)/18μd_p²](1-e^{-18μg/d_p2γ_pt})
v_x=(γ_p-γ_a)d_p²/18μ
+[Vcosθ-(γ_p-γ_a)/18μd_p²]e^{-18μg/d_p2γ_pt}
M_x=πd_p³γ_p/6g{(γ_p-γ_a)/18μd_p²
+[Vcosθ-(γ_p-γ_a)18μd_p²]e^{-18μg/d_p2γ_pt}}
E_x=πd_p³γ_p/12g{(γ_p-γ_a)/18μd_p²
+[Vcosθ-(γ_p-γ_a)/18μd_p²]e^{-18μg/d_p2γ_pt}}²
x, θ: cf fig 1. d_p: Dia. of particle, cf fig 5. γ_p, γ_a: Specific gravity of particle and air. μ: coeff. of viscosity. t: time, g: acceleration of gravity. V: Initial velosity on nozzle tip. (y direction same x)
So we took the practical results of them as fig 6 and fig 7, applied the data of fig 2-fig 5.
In this case we were known the same aspect in the results of calculating and measuring on spreading diametrs as fig 8.