(3/) (14.3). , , Q ( ) t h V. / ( 22.2), () :
Q = 60 t hV..
22.2 ,
, 3/ | ||||
1000 | 1000 - 2400 | 2500 - 4500 | 5000 - 10000 | |
V. / . | 10 15 14 40 1.15 | 20 25 14 28 | 30 35 14 28 0.9 0.8 | 40 45 14 20 0.75 0.65 |
( )
Q = 36.7 N K. K./(2 . + 0.1 ), (22.8) N ( ), ; - ( , ); . ; . ; , ; - , /3.
(22.8) . . .
Q = Q (22.9) . 22.3. . . (. 22.2) (. . 22.9, ) .
= ./. = n/n, (22.10) n n .
22.3 ( )
, , | ||||||||
0.64 0.7 0.7 0.76 0.74 0.8 | ||||||||
1250 SRs 470 -1600 -5000 SRs - 2000 | 0 72 0.7 0.87 0.82 0.72 0.67 0.78 0.76 0.87 0.85 0.78 0. 73 0.8 0.78 0.9 0.88 0.82 0.76 | |||||||
|
|
22.9 . () () :
1 - . = 6; 2 . = 10; 3 . = 14; 4 . = 18
. , 0.3 0.4 . : ; 2.5 4; ; ( ); ; ( ) . 10 25%.
( ), ( ), ( ), - , - . min (c ) , V. .
V. = , = .
min () , ( ) .
. 0.76 0.84. = 0.8.
. .
1250 SRs -470 1600 5000 SRs 2000
., 16 17 40 38 28
, 23.5 26 60 55 40
, ,
` = 0.8/(0.042 + 0.958). (22.11)
, .,
`` = ` + 0.064(1 /.). (22.12)
(22.12) 0.4..
|
|
h h (h = 0.7d)
`` = ``h/(2.4 + 0,6h). (22.13)
Q = Q = Q..(17.7)
, , .
. = ./.., (22.14) .. .
, .
...........
................................................... 0.9 0.93 0.97
= 0.92 0.96. , , . 0.5 0.65; . .