, | ω, /, ρ , /³ | ||||
0,3 2 | 0,5 - 1 | 2 - 5 | 3 - 7,5 | 4 - 8 | 5 - 10 |
2 | 1 - 3 | 3 - 5 | 4 - 8 | 6 - 10 | 7 - 12 |
0,2 5 ρ = 8001200 /³ 25 /. 1 2 , ρ = 900 /³. ω = 0,8 /.
t = (108 + 73)/2 = 90,5 ≈ 91 .
t .
. (9)
: ωρ = 0,6.1,8 /(²), n = 1,55 /, β = 1025 %.
ωρ = 1,80,97 = 1,746 /(²) .
5-8 /; n = 5 /.
β . -, β = 12 %.
, . . = 105 .
.
:
P = (/ ) /(1/ c. + / ). (10)
.
P 1 = (0,0125/18)105/(1/29+0,0125/18) = 1974 .
.
P 2 = (0,026/18)105/(1/29+0,026/18) = 4020 .
.
= ( 1 + 2)/2 = (1974 + 4020)/2 = 2997 .
, :
β υ = -1.
Δ x ´ :
Δ x ´ = (11)
Δ x ´ = 1* 1/ , /³; Δ x ´ = 2* 1/ , /³; 2*, 1* , /³.
Δ , (),
Δ = (Δ Δ )/ln (Δ / Δ ). (12)
: ΔP = 1* 1 , ; Δ = 2* 2 , ; 1*, 2* , .
1* 2* (t 1) (t 2) . I x : t 1 = 63 , t 2 = 61 ; 1* = 17940 , 2* = 16950 .
.
/³
|
|
/³.
, , , , :
V c = 0,03/(0,712∙0,087) = 0,98 ≈ 1 ³.
, , :
V = Q /( υ Δt ), (13)
Q t 1, ; K υ , /(³); Δt , .
Q :
Q = G (t 1 θ 1) + W (t 1 θ 1); (14)
Q = 2,21,19(63 52) + 0,031,35(63 52) = 29,5
:
K υ = 16(ωρ)0,9n0,7β0,54; (15)
K υ = 161,7460,950,7120,54 = 311 /(³∙) = 0,311 /(³∙).
Δt t x, , t 1. :
Q = L . (1 + 1)∙ (t 1 t x); (16)
29,5 = 2,22∙(1 + 0,0125)∙1∙(108 t x),
t x = 2,22∙(1 + 0,0125)∙1∙(108 29,5) = 176,4
t x = 176,4≈176 .
:
Δt = [(t 1 θ 1) + (t x t 1)]/2, (17)
Δt = [(108 52) + (176 63)]/2 = 84,5 C.
:
V = Q /( υ Δt ).
V = 29,5/(0,311∙84,5) = 1,12 ³.
V = V c + V = 1 + 1,12 = 2,12 ³.
- A υ, /(³∙). A υ :
V = 3600∙ W/A υ, (18)
υ = 7,2 /(³∙).
V = 3600∙0,03/7,2 = 15 ³
V = 15 ³.
.
2 .
2 6843 : V = 45,6 ³; d = 2,2 ; L = 12 .
:
ω = υ /(0,785∙ d ²). (19)
(/) :
(20)
, / .
, :
³/
ω = 2,26/(0,785∙2,2²) = 0,59 ≈ 0,6 ³/.
2