Table 1 – LRPM burner test-rig design and operational characteristics
Air flow rate |
(kg/h) |
500 |
nominal, pc-controlled |
Burner-inlet air temperature |
°C |
300-400 |
max, pc-controlled |
Test-rig thermo-chemical power |
(kW) |
250 |
max, from fuel injection |
Equivalence ratio |
- |
0.42 |
nominal, ultra-lean, controllable |
Combustor pressure |
(bar) |
1.15 |
nominal, sustainable up to 1.3 bar |
Electrical preheating power |
(kW) |
110 |
max, pc-controlled |
Fan (radial) absorbed power |
(kW) |
2.65 |
nominal, pc-controlled |
Liquid fuel type |
Distillate #2 |
also: propane, gas-oil and jet-A | |
Fuel injection |
"channel" or "eye" |
in either case: 8 injection holes | |
Fuel injection pressure |
(bar) |
2 |
variable, low-pressure injection-type |
Burner type |
LRPM, radial |
variable-geometry | |
Burner pressure drop (D p/p) |
- |
0.03 |
nominal, theor., to be verified |
Combustor type |
can, no ext. Shield |
thermal coating inside | |
Combustor exit Mach-number |
- |
0.05 |
nominal, controllable |
Combustor traversing stations |
9 |
water cooled traversing probe | |
Primary-flame temperature |
°C |
1200 |
nominal, controllable |
Combustor outlet temperature |
°C |
1100 |
nominal, theor., to be verified |
Test-rig discharge type |
water cooled, atm. |
water jacketed discharge duct | |
Discharge temperature |
°C |
350 |
design, to be verified |
Wall temperature measurements |
12 |
thermocouples, pc-linked | |
Air flow control |
diafragm-type |
pc-controlled | |
Liquid fuel control |
micro-needle valve |
pc-controlled |