Geoscience Reference
In-Depth Information
Tabl e 6. 1
Vo r t e x p l a s m o i d
Q
af
,G/s •
T
,K
P
T
,W
D
P
T
/
P
HF
parameters
13.4
X
, 530
7,000
3.7
14.4
X
, 520
7,643
4.02
14.6
X
, 420
6,284
3.3
14.65
X
, 362
5,430
2.86
13.8
W
, 437
6,174
3.25
Tabl e 6. 2
Capacity-coupled
high-frequency discharge
(CHFD) plasma parameters in
the non-swirl (straight
streamline) airflow
Q
af
,G/s •
T
,K
D
P
T
/
P
HF
14.65
X
, 32 480 0.25
17.2
X
, 33 583 0.31
17.2
W
, 27 477 0.25
X
corresponds to the temperature measure-
ment near the duct axis;
W
corresponds to
the temperature measurement near the duct
wall
P
T
,W
Tabl e 6. 3
Calorimetric
calibration experiment results
Q
af
,G/s •
T
,K
P
T
,W
I
H
,
A
/
U
H
,V
P
E
,W
7.11v
75
546
15/33
500
5.17s
84
445
15.5/33.6
521
5.17v
79
418
14.5/33.1
463.4
6.03s
76
469.3
15/33.1
496.5
s straight streamline airflow, v swirl flow
Thermal power
P
T
of the gas flow heated by a capacity-coupled high-frequency
discharge was estimated by the formula:
P
T
D
Q
af
C
p
ıT
where
C
p
is the heat permeability. The obtained experimental results are shown in
Tab le
6.1
.
One can see that airflow heating by the vortex plasmoid is more effective
compared with the filamentary plasmoid, created in the straight streamline airflow
(at the same high-frequency power input to the plasma). Note that the thermal
power of the output airflow heated by a capacity-coupled high-frequency discharge
exceeds the high-frequency power input to the plasma (
1.9 kW) by a factor of
3-4. This result is not clear today: one can suppose that there is additional power
release connected with cluster creation in the plasma (condensation power) and their
destruction in swirl flow. So, there is additional heating of the oncoming swirl flow
by this power source. This principal question we plan to study in detail in future
experiments.
One can see that there is a power loss in the straight-streamline airflow at the
same experimental conditions as in the previous experiment (see Table
6.2
).
The calibration experiment in this setup was carried out by the electric wire
heater (using a tungsten wire). The obtained experimental results are shown in
Tab le
6.3
. Electrical voltage, current, and power were measured in this experiment.
