w dp/ds
(II.8)
. aw >> bw2 ; w > w aw bw2 ; aw << bw2
(II.9)
. (II.9) . . .
b , a = μ/k, a b , . .
(II.10)
ρ /3; k ; m .
, c,
(II.11)
sign dp/ds; , , 1 < n ≤ 2, n = 2 .
,
(II.12)
f (m) = l0 m 2,3.
16
, , , 10 do=10 , h = 15 ,. k=1 , m = 18%, μ = 4 ∙, ρ = 870 /3 140 3/.
: Re =15,6 ( ),
Re = 0,396 ( ).
17
r, c, , , Q a = 2∙106 3/, h = 10 , k= 0,6 , m =19%, μ =1,4∙10-5 /∙, ρ = 0,7 /3.
. . . Re Re = 0,022.
: Re = 7,9 .
18
, , , Q = 200 3/, h = 5 , m=16%, k = 0,2 , ρ = 0,8 /3, μ = 5 ∙. , r = 0,1 .
|
|
: Re = 0,036< Re = 1.
19
, Q = 2∙106 3/, p = 7,84 (80 /2), h =10 , m = 18%, k =1,2 , 18, μ = 0,015 ∙, 45 .
, r = 10 .
. . 0 760 . . (0,1013 )
ρ0 = 18/22,4 = 0,804 /3,
/3
/
. . .