.
:
=(Ia-IT)/(Ia-ICT)=1/(1+0,086ψ-1σ(ReH)0,55 Bu-0,86 (l/d)-0,75), (4.6)
Ia , Q, ..
Ia=Q=Q (4.7)
Ia δ,˚ (=δ+273,˚). I
=(t+ t)/2+ (25), (4.8)
( ),
d=3,6VT/FCT, (4.9)
.
F, 2, , F..
F=∑Fi+F..-F.., (4.10)
, 2, (, .) F.
= F- F, (4.11)
Ψ (4.6)
Ψ=(∑Ψi...Fi)/(F -Ψ..F.), (4.12)
Ψi... i- .
σ (4.2) (4.6) , :
d=d-σ=1;
dd-σ=5(d/d)2-7,4(d/d)+3,5;
: -σ=0,85√(d/d)
(4.4)
ReH=ωd/ν=(Vd)/273ν, (4.13)
V α, 3/, 3/3; , /, 3/.
ν, 2/,
ν=1/(∑ri/νi), (4.14)
ri ; νi .
, -1,
=( R)/( +R) (4.15)
= rH O,[( )-1] (4.16)
|
|
R=RrRO,
, R 2 R2, ;
rH O,rRO 2 R2 (α=1).
, (4.6), , , .
QT=KTBP(Ia-IT) (4.17)
(4.2) :
= (Ia-IT)/(Ia-ICT) = 1/(1+0,115ψ-1σ(ReH)0,55 Bu-0,86 (l/d)-0,75), (4.18)
.
, 2,
F = ∑Fi+F..-R, (4.19)
R , 2.
.
ΨC= (∑Ψi...Fi)/(F-R-Ψ..F.), (4.20)
σ
σ=(1-d/d+0,01μ)[π(d)2/(4R) + h/l]0,5, (4.21)
l , ; h , ; μ , %; d , ;
d=(dmax+dmin)/2
(4.13).
= ++, (4.22)
; , .
+= 0,0020,005,-1
:
Bu=KTd/α
.