Table 3: Operational requirement of HFG facility.

Test Section Parameters

Vacuum Tank and Pump

Working medium

Nitrogen

Tank volume

80 m3

Max. Velocity

2.5 km/s

Pumping rate at 1mTorr

10,00 CFM

 

 

Initial back pressure

10 mTorr

Flow rate

0.2 g/s

 

 

Back pressure

10 mTorr

Final back pressure

40 mTorr

Max. back pressure

40 mTorr

Lowest vacuum pressure

1 mTorr

 

 

Average temperature

300 K

Max. run time

28 sec

 

 

Nozzle Configuration

Diagnostic Tools

Material

Tungsten

Flow velocity

Pitot tube or LDV

Nozzle throat diameter

1 mm

Pressure

Pressure gage

Nozzle exit diameter

100 mm

Vacuum

Vacuum gage

Nozzle length

350 mm

Temperature

Thermocouples or TIS

Expansion conical angle

16 degree

Flow rate

Flow controller

Mach envelop diameter

700 mm

 

Thermal Chamber Parameters

Others required

Chamber material

Tungsten or HfC

Gas feeder & controller

0.2 g/s at 300K

Max. Gas temperature

3000 K

 

 

Max. chamber pressure

3.5 atm

Thermal Imaging system (TIS)

300 K, continuous monitoring

Max. flow rate

0.3 g/s

Arc Lamp: 70-600 Amp

250 V, current monitoring and controlled with TIS reading