GE LM6000 Combustor Units

The LM6000 is an aeroderivative gas turbine derived from the CF6-80C2 aircraft engine, modified for industrial and marine applications.

1. Combustor Type & Design

Dual Annular Combustor (DAC):

Used in LM6000 PC/PF/PD models
Features two combustion zones (pilot and main) to optimize emissions and fuel flexibility
Allows lean premixed combustion for low NOx emissions

Single Annular Combustor (SAC):

Earlier versions used a single-can combustor
Less efficient in emissions control compared to DAC

2. Key Features

Fuel Flexibility:

Can burn natural gas, diesel, and liquid fuels
Supports dual-fuel operation (gas + liquid backup)

Low Emissions:

Dry Low Emissions (DLE) capability in later models
NOx emissions as low as <25 ppm (with water injection or DLE systems)

Combustion Liner & Flow Path:

High-temperature-resistant materials (e.g., Hastelloy X, ceramic coatings)
Optimized airflow for stable combustion across load ranges

3. Combustor Operation

Staged Combustion:

Pilot stage for ignition and low-load operation
Main stage engages at higher loads for efficiency

Fuel Nozzles:

Multi-port fuel injectors ensure even distribution
Air-assisted atomization in liquid fuel mode

4. Maintenance & Durability

Inspection Intervals: ~8,000–24,000 hours (depending on fuel type)

Common Wear Issues:

Liner cracks, nozzle clogging, thermal fatigue

Upgrades Available:

Advanced coatings for longer life
Retrofit DLE systems for emissions compliance

5. Technical Specifications (LM6000-PF+)

Parameter	Value
Combustor Type	Dual Annular (DAC)
NOx Emissions	<25 ppm (DLE) / <42 ppm (water injection)
Fuel Types	Natural gas, diesel, jet fuel
Combustor Pressure	~200–300 psi (varies with load)
Operating Temp.	Up to ~1,700°F (930°C)

Parameter

Value

Combustor Type

Dual Annular (DAC)

NOx Emissions

<25 ppm (DLE) / <42 ppm (water injection)

Fuel Types

Natural gas, diesel, jet fuel

Combustor Pressure

~200–300 psi (varies with load)

Operating Temp.

Up to ~1,700°F (930°C)

7. Comparison with Other GE Combustors

Unlike Frame turbines (e.g., GE 7/9HA), the LM6000 uses an aeroderivative annular combustor (similar to aircraft engines)

More compact than heavy-duty can-annular combustors

The LM6000 combustor is optimized for high efficiency, fuel flexibility, and low emissions, leveraging GE's aviation heritage. Later models (PF/PD) feature advanced DLE systems for stricter environmental compliance.