-- . , . : , , (). apriory , . , .
: , , . .
.
50 . 3/.
:
G′ - , . .../.
a′ - , /. ...
t0 , 0.
f′(d) d , -1.
G , ..../.
G′ , . /.
u′ - , . /. ...
t , 0.
G″ , . .../.
″ - , . /....
t , , 0.
f″(d) d , -1.
G , , . .../.
G″ , , . /.
u″ - , . /....
: t, W .
.
:
G′ + G′ = G″ + G″ (1)
:
G′ ∙ ′ + G ∙ u′ = G ∙ u″ + G″ ∙ ″ (2)
, . . , .. , . < 3500-4000, ~ 10000. , , . . ,
|
|
″ = = (3)
:
G′ + G = G″ (4)
G , . /. , .
. 30% . , , , .
G.
w (. ).
W = G (1 + w″) ∙ 1/ρ ∙ 4/πD2, /. (5)
ρ , G G
G = G ∙ w″, . /. (6)
(7)
(8)
(9)
, .
:
,
dmax , , ν , .
Re = f(Ar) [.1.1],
(10)
G . :
G′ = N∙ ρ ∙ πd3/6 ∙ f′(d) ∙ d(d),
N - , /.
,
,
, G = G′∙ d3 ∙ f′(d) ∙ d(d) ∙ ( d3 ∙ f′(d) ∙ d(d))-1.
(11)
d, d < dMAX :
, dMAX < d < ∞. (12)
, .. .
:
:
G′∙∙t0 . ;
G′∙(′ - )∙∙t0 ;
G∙∙t . ;
G∙u′∙∙t ;
|
|
G′∙∙t , .
:
G″∙∙t . (: );
G∙∙t . ;
G″∙∙t ;
G′∙(″ - )∙∙t , ;
G∙u′∙∙t , ;
G′∙(′ - )∙r ( r t).
, :
t = [G′∙∙t0+G′∙(′-)∙∙t0+G∙∙t+G∙u′∙c∙t+
+G′∙∙t-G′∙(′-)∙r] ∙
[G″∙+G+G″+G′∙(″-)∙+G∙u′∙c]-1 (13)
, t . , , W .
W = w / w,
w , , w . .. :
ε = ε0∙1,1, ε0- , ε0 = 0,45. ε = 0,495.
Ar ≡ (gd*3/ν2)∙(ρ/ρ).
Re Ar d* - :
d* = (14)
, :
, /. (15)
, /. (16)
: