- | -- - | - - | ||
- | v =const | |||
- | =const | |||
-- | T =const | |||
- | s =const |
1.
v=const , , ..., . . .
:
1. 1= 0,100 .
2. t1 = 20 º.
3. e = 3,6.
4. l = 3,33.
:
1. (, v, T, u, i, s) .
2. q 1 q 2, l, ... ht.
3. Du, Di, Ds, q l.
4. p-v T-s, , .
.
, - . R =287 /(×), k =1,4, cp =1,005 /(×), cv =0,718 /(×). .
1. :
1
1 =0,100 , 1 =293 ,
=0,841 3/,
=0,718(293-273)=14,36 /,
=1,005(293-273)=20,10 /,
=0,075 /(×).
2
0,6 ,
2933,60,4=489 ,
0,233 3/,
=0,718(489-273)=155,09 /,
=1,005(489-273)=217,08 /,
=0,075 /(×).
3
0,63,33=2 ,
4893,33=1628 ,
0,233 3/,
=0,718(1628-273)=972,89 /,
=1,005(1628-273)=1361,77 /,
=0,937 /(×).
4
0,13,33=0,33 ,
16280,2770,4=976 ,
0,841 3/.
=0,718(976-273)=504,75 /,
=1,005(976-273)=706,52 /,
=0,937 /(×).
2. :
0,718(1628-489)=817,8 /;
:
0,718(976-293)=490,39 /.
:
817,8-490,39=327,41 /.
... :
.0,40
0,40.
3. Du, Di, Ds, q l .
1-2 ( ):
Du1-2 = u2 u1 = 155,09 14,36 = 140,73 /;
Di1-2 = i2 i1 = 217,08 20,10 = 196,98 /;
Ds1-2 = 0;
q1-2 = 0;
l1-2 = - Du1-2 = - 140,73 /.
2-3 ():
Du2-3 = u3 u2 = 972,89 155,09 = 817,80 /;
Di2-3 = i3 i2 = 1361,77 217,08 = 1144,69 /;
Ds2-3 = s3 s2 = 0,937 0,075 = 0,862 /(K);
|
|
q2-3 = q1 = 817,8 /;
l2-3 = q2-3 - Du2-3 = 817,8 817,8 = 0 /.
3-4 ( ):
Du3-4 = u4 u3 = 504,75 972,89 = - 468,14 /;
Di3-4 = i4 i3 = 706,52 1361,77= - 655,25 /;
Ds3-4 = 0;
q3-4 = 0;
l3-4 = - Du3-4 = 468,14 /.
4-1 ( ):
Du4-1 = u1 u4 = 14,36 504,75 = - 490,39 /;
Di4-1 = i1 i4 = 20,10 706,52 = - 686,42 /;
Ds4-1 = s1 s4 = 0,075 0,937 = - 0,862 /(K);
q4-1 = - q2 = - 490,39 /;
l4-1 =0.
5.
5
1 2
Du, / | Di, / | Ds, /(×) | q, / | l, / | |
1-2 | 140,73 | 196,98 | -140,73 | ||
2-3 | 817,8 | 1144,69 | 0,862 | 817,8 | |
3-4 | -468,14 | -655,25 | 468,14 | ||
4-1 | -490,39 | -686,42 | -0,862 | -490,39 | |
327,41 | 327,41 |
4. p-v 1-2 3-4, :
6.
6