15.
, 0 , . (. 76, ), Ci 1 cti, -
,
)
6)
. 76. () () : / , 2
2 wit , ; 4 f$i .
, , . \ 2 . .
, , . R' , , , R (. 76, ). , .
^ ' ). , =(od/2, d . R, Ru Ra , :
Ru*= G (cx cos <*! + cos <); Ra s= G (cx sin <*! sin ) -(- Q, (px p2),
G ; =(*/2 dK2) , (du dK ).
Ru, , , . Ra , , .
Nu, ( ), Ru , . . Nu=Ruu. Nu Lu, 1 /, . . LU==NU/G.
. , s- t0 (. 77). t0 - , 0. , 4 /- , , 1 pi, it.
|
|
/ . ,
. 77. i, s-
2 in- 2 , fc.
' - ') =
t'n , , Aoc=io tit ; = = ci/c , , , .
' (/)
= V2 /2 = tc<V2,
£ =12 .
* ti=tit+AAc. , :
wl='l/"c1*-f *211.
t2t ; /*op=ti^t2t ; | , , , (■ty = W2/w2t).
(=0,954-0,98; |=0,89-^-0,97).
(/) :
/1 =, iu = (w\t *)/2 = 22</2,
£=12 .
2 (. . 76):
V w.
2uw2cos
, , , . , = = 22/2:
Lu = * /1 .
£= 2^, >= (2/2)+/1= (02/2)+ + / , , (. . 77), a 22/2 , . , =0, , =1- 0^^1.
Lu ' : t\oa=Lu/Eo. /, , < - <ii *2 . , , /=2/2. £, £0 £ (. 78), :
|
|
* /£0; = £.
. 78. (): / , 2
("KL-
. 79. ()
, , . . 2=90 2 . ^ / , * .
" - , - , . 2 / (. 79, ) , , (. 79, ). , , NTp.
Giy (. 80), , Gz? . (. 81, ).
- , , , , ^. , /,-, , Nu, , :
. 80.
Nu-\Nip-ANy.
, , , :
- #0 = (NJNO) - (ANrv/N0) - {ANy/N0) = , -; ..