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