
227Heat Transfer
L
r
q˝
rad
(kW/m
2
)
20
30
40
50
60
q
f
= 5.00 kW
q
f
= 15.0 kW
q
f
= 25.0 kW
FIGURE 10.23
Total nonluminous gaseous radiation (q″
rad
) as a function of distance
from the burner (L
r
) and ring rate (q
f
= 5.0, 15.0, 25.0kW) for Ω = 1.00,
ϕ = 1.00, D
r
= 0.5. (From Baukal, C.E. and Gebhart, B., Int. J. Heat Mass
Transfer, 44(11), 2539, 1997.)
L
r
0123456
q
˝
rad
(
kW/m
2
)
10
20
30
40
50
60
Ω=
0.35
Ω=
1.00
FIGURE 10.24
Total nonluminous gaseous radiation (q″
rad
) as a function of distance
from the burner outlet (L
r
) and oxidizer composition (Ω = 0.35, 1.00)
for q
f
= 15.0kW, ϕ = 1.00, D
r
= 0.5. (From Baukal, C.E. and Gebhart, B.,
Int. J. Heat Mass Transfer