.


:




:

































 

 

 

 





Lq :

(8.7)

:

- , ;

- , (t t), /;

- , , ;

- , .

- , , /3 ( t).

:

= Q Q , (8.8)

Q , ;

Q , .

( ) , ..

Q = Q + Q , (8.9)

Q , ;

Q . .

.

Q = ∑ Q = Q,

= Q + Q - ∑ Q (8.10)

.. , :

= q n , (8.11)

q =130 / ( t = 18 );

n 4 2 1 . , .

≈ 1,0 /( )

, (), ρ = 1,2 /3.

, t , . t = t.

t , . t =t (510) , t = 18 - 8 = 10 .

L :

(8.12)

D1 = 210 / , ( );

d , / , Id t = 18 ;

d , / , Id t = 5 φ . φ =70%.

 

2 L :

(8.13)

G1 =70 / , ( );

- b 2 , /;

- b 2 , /.

 

9. 2.4 L :

(8.14)

L , 3/.

 

L Lq =3732 3/, L =640 3/, L =4600 3/ .. L = L =4600 3/.

 

9.2.5 L :

L = L / , (8.15)

= t + 273.

 

9.2.6 Q ( ) :

(8.16)

ρ ( t = 10 ρ =1,24 /3);

- t .

 

9.2.7 :

(8.17)
(8.18)

: , - , - .





:


: 2016-11-12; !; : 345 |


:

:

, ; , .
==> ...

1774 - | 1529 -


© 2015-2024 lektsii.org - -

: 0.009 .