: (. 8.1).
1
Q=100 3/;
ρ=2200 /3;
d=15 ;
: 1) ρ = 1066 /3; 2) μ = 1,14 ⋅10-3 ⋅.
. , , (. 8.1).
. 8.1. : 1 ; 2 ; 3 ; 4 ; 5 ; 6 ; 7
, , . , . , , .
Re Ar. . m , : . w. w , [6]:
w= g *d2*(ρ − ρ)/ 18* μ, (8.1)
d (. 8.1), ; ρ (. 8.1), /3; ρ (. 8.1), /3; μ (. 8.1), ⋅; g , g = 9,81 /2.
w=9,81*(15⋅10-6)2*(2200-1066)/18*1,14 ⋅10-3=0,12⋅10-3/.
w , r [6]:
r= g d 3ρ(ρ − ρ)/ μ2, (8.2)
r=9,81*(15⋅10-6)3*1066*(2200-1066)/ (1,14 ⋅10-3)2=0,031
Re:
- Ar =0,031≤ 36
|
|
Re =Ar /18, (8.3)
Re =0,031/18=0,00172
, ( , , ) w' , /:
w' =0,5* w , (8.8)
w' =0,5*0,12⋅10-3=6⋅10-6/.
F, 2, :
F = Q/ w ', (8.9)
Q (. 8.1), 3/.
F =100/6⋅10-6=1,667⋅1062.
D, , F :
D = √4F /π, (8.10)
D = √ 4*1,667⋅106/3,14=1457.