Numerical Investigation of Fuel Distribution Effect on Flow and Temperature Field in a Heavy Duty Gas Turbine Combustor
-
Xiaowen Deng
,
Hong Yin
Abstract
Multiple-swirlers structure is commonly adopted for combustion design strategy in heavy duty gas turbine. The multiple-swirlers structure might shorten the flame brush length and reduce emissions. In engineering application, small amount of gas fuel is distributed for non-premixed combustion as a pilot flame while most fuel is supplied to main burner for premixed combustion. The effect of fuel distribution on the flow and temperature field related to the combustor performance is a significant issue. This paper investigates the fuel distribution effect on the combustor performance by adjusting the pilot/main burner fuel percentage. Five pilot fuel distribution schemes are considered including 3 %, 5 %, 7 %, 10 % and 13 %. Altogether five pilot fuel distribution schemes are computed and deliberately examined. The flow field and temperature field are compared, especially on the multiple-swirlers flow field. Computational results show that there is the optimum value for the base load of combustion condition. The pilot fuel percentage curve is calculated to optimize the combustion operation. Under the combustor structure and fuel distribution scheme, the combustion achieves high efficiency with acceptable OTDF and low NOX emission. Besides, the CO emission is also presented.
Funding statement: The research project of China Southern Power Grid Company Ltd, (Grant/Award Number: ‘No.K-GD20140492’) General Financial Grant from China Postdoctoral Science Foundation, (Grant/Award Number: ‘2015M570696’).
Acknowledgments
The authors would like to acknowledge the financial support from the project supported by General Financial Grant from China Postdoctoral Science Foundation (2015M570696) and the research project of China Southern Power Grid Company Ltd (No.K-GD20140492). Thanks to Dr. Li Debo for beneficial discussions.
Nomenclature
- T
Temperature, K
- M
Mass flow rate, kg/s
- P
Pressure, kPa
- TI
Turbulence intensity
- H
Combustion efficiency
- y+
y plus
- Abbreviations
- OTDF
Outlet Temperature Distortion Factor
- UHC
Unburned Hydro-Carbon
- RANS
Reynolds averaged Navier-Stokes
- LES
Large eddy simulation
- Subscripts
- F
Fuel
- A
Air
- O
Outlet
- I
Inlet
- Max
Maximum
- Ave
Average
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Articles in the same Issue
- Frontmatter
- Mechanism of Film Cooling with One Inlet and Double Outlet Hole Injection at Various Turbulence Intensities
- State of Aircraft Turboshaft Engines by Means of Tribotechnical Diagnostic
- Theoretical Study of the Vibration Suppression on a Mistuned Bladed Disk Using a Bi-periodic Piezoelectric Network
- Effect of Axisymmetric Aft Wall Angle Cavity in Supersonic Flow Field
- A Generalized Method for the Comparable and Rigorous Calculation of the Polytropic Efficiencies of Turbocompressors
- Sliding Mode Fault Tolerant Control with Adaptive Diagnosis for Aircraft Engines
- Numerical Study on the Improvement of Oil Return Structure in Aero-Engine Bearing Chambers
- Numerical Investigation of Fuel Distribution Effect on Flow and Temperature Field in a Heavy Duty Gas Turbine Combustor
- A Novel Quasi-3D Method for Cascade Flow Considering Axial Velocity Density Ratio
