Nozzle |
Q at 100 BAR |
k-factor |
Hydrogrynding |
Hole diameter |
A |
120 cm3/30s |
-1,5 |
No |
Di=0,255; D0=0,240 |
B |
170 cm3/30s |
0 |
Yes |
0,240 |
C |
170 cm3/30s |
0 |
No |
0,273 |
D |
170 cm3/30s |
+1,5 |
Yes |
Di=0,255; D0=0,240 |
Table 4.3.1.1: Nozzle parameters
The heater element voltage is supplied by a power supply unit which has output voltage range between 0–15 V and current range between 0–150 A. Temperature indicators mounted onto the power supply unit to observe the vessel temperature. A PDI control unit is also mounted inside the power supply unit to prevent the constant volume vessel overheated.
Before the experiments carried out, the temperature distribution inside the chamber were measured. Place-to-place temperature measurements showed that the points closer to the heater element had higher temperatures. However, when the chamber was heated maximum temperature variation inside the chamber was 26◦K, except the measurement points closer than 10 mm to heater.