Effect of Water Injection into Aero-derivative Gas Turbine Combustors on NOx Reduction


  •   Roupa Agbadede

  •   Isaiah Allison


Oxides of Nitrogen (NOx) generated from gas turbines causes enormous harm to human health and the environment. As a result, different methods have been employed to reduce NOx produced from gas turbine combustion process. One of such technique is the injection of water or steam into the combustion chamber to reduce the flame temperature. A twin shaft aero-derivative gas turbine was modelled and simulated using GASTURB simulation software. The engine was modelled after the GE LM2500 class of gas turbine engines. Water injection into the gas turbine combustor was simulated by implanting water-to-fuel ratios of 0 to 0.8, in an increasing order of 0.2. The results show that when water-to-fuel ratio was increased, the Nox severity index reduced. While heat rate and fuel flow increased with water-to-fuel ratio (injection flow rate).

Keywords: Flame Temperature, Fuel Flow, Heat Rate, NOx Severity Index, Water-to-Fuel Ratio


Lefebvre, H. A. and Ballal, R. D. (2010) “Gas Turbine Combustion – Alternative Fuels and Emissions”, 3rd Edition, CRC Press, Taylor and Francis Group, London.

Syed, S. M. (2013) “A new diagnostics tool for water injected gas turbines – emissions and modelling”, PhD Thesis Louisiana State University, USA.

Urbach, B.H., Knauss, T. D., Wallace, L. B., Emory, J., Frese, J. and Bishop, W.J. (1998) “Water Injection into Navy Gas Turbine Combustors to Reduce NOx Emissions, America Society of Mechanical Engineers, 2-5 June, 1998, Stockholm, Sweden.

Galdo, L. I. M., Castro-Santos, L. and Vidal, R.G.C. “Numerical Analysis of Nox Reduction Using Ammonia Injection and Comparison with Water Injection” Journal of Marine Science and Engineering, vol. 8 (109) pp. 1-14.

Benini, S., Pandolfo, S. and Zoppellari, S. (2009) “Reduction of NO emission in a Turbojet Combustor by Direct water/ steam injection: Numerical and Experimental Asessment, Applied Thermal Engineering, vol. 29, Iss 17-18, pp. 3506-3510.

Novelo, B. A. D. and Igie, U. “Aero Engine Compressor Cooling by Water injection – Part 2: Performance and Emissions, Journal of Energy, Elsevier, vol. 160, pp. 1236-1243.

Xue, R., Hu, C., Nikolaidis, T. and Pilidis, P.(2015) “Effects Steam addition on the flow field and NOx Emissions for Jet-A aircraft Combustor, International Journal Turbo and Jet –engines, vol. 33, Iss 4, pp. 381-394.

Farokhipour, A., Hamidpour, E. and Amani, E. (2018) “A numerical study of Nox reduction by water spray injection in gas turbine combustor chambers”, Science direct, Fuel vol. 212 pp. 173-186.

Gonca, G. (2014) “Investigation of the effects of steam injection on performance and No emissions of a diesel engine running with ethanol –diesel blend”, Journal of Energy Conversion and Management, vol. 77, pp.450-457.

Kollrack, R. and Aceto, D. L. (1973) “The effects of liquid water addition in gas turbine combustors”, Journal of the Air Pollution Control Association, vol. 23, pp.116-121.

https://www.energy.gov/sites/prod/files/2013/11/f4/gas_turbines_nox_cost_analysis.pdf Accessed 15 September, 2020.

https://www.nescaum.org/documents/nox-2000.pdf/ Accessed 15 September, 2020.


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How to Cite
Agbadede, R. and Allison, I. 2020. Effect of Water Injection into Aero-derivative Gas Turbine Combustors on NOx Reduction. European Journal of Engineering and Technology Research. 5, 11 (Nov. 2020), 1357-1359. DOI:https://doi.org/10.24018/ejers.2020.5.11.2180.