(, /) [3]. , , .
, . 20- .
, - (/). 5 . , .
, .
: .
: (. . 1.1), , .
1. o [2] .1 (.), (.) (.) ( , ) .
| .., /3 | ., /3 | .., /3 | , /3 | ||
30 % ... .
2. (/)
( )2 3Ö Vi Dt
= Fmnh (1.32)
(Dt 0)
( )4/38Vi Dt
= FmnhD, (1.33)
- (.) , /3; , /3; ( = 2 ), ; Vi , 3/; Dt , ; , ; F , ; m n , ; η , .
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3. Vi, (3/), ,
V1 = pD2 w 0 / 4, (1.34)
D , ; w0 , /.
- () (1.32) (1.34) w0 (/) D = D () Vi = Vi ( 3/).
D, ()
D = 2Lb / (L+b), (1.35)
L b , .
Vi (3/)
Vi = pD2 w0 / 4. (1.36)
(L = b) D . .
4. .
5. F :
) ( ) 1;
) (, . .) 90 % 2; 75 90 % - 2,5; 75 % 3.
F .
6. m f; V; V¢ f:
f = 1000w02D / H2Dt; (1.37)
V = 0,65 3Ö ViDt / H; (1.38)
V ¢= 1,3w0D / H; (1.39)
f = 800 (V¢)3 . (1.40)
m f:
m = 1 / (0,67 + 0,1Öf + 0,34 3Ö f) f < 100; (1.41)
m = 1,47 / 3Ö f f ³ 100. (1.42)
f < f < 100 m f = f.
n f < 100 V :
n = 1 V ³ 2;
n = 0,532V2 2,13V + 3,13 0,5 £ V< 2; (1.43)
n = 4,4 V V< 0,5.
f ³ 100 Dt 0 n V = V¢.
7. h , . , 50 1 , h = 1, h .
.
8. .
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= Vi10-3 , (1.44)
- , (/3), (. . 1.1); Vi - , (3/).
£ .
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3. ?
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