Influence of the method of gas fuel supply on emissions of toxic substances from a single-nozzle compartment

Аuthors

Baklanov A. V.

Kazan Motor Production Association, 1, Dementyeva str., Kazan, 420036, Russia

e-mail: andreybaklanov@bk.ru

Abstract

One of the main parameters that characterize the efficiency of the combustion process in the combustion chambers is the concentration level of harmful substances in the combustion products.
This article considers the influence of the fuel delivery method implemented in the nozzle on the change of the parameter presented above.
The paper presents the design features of injectors that work with a separate supply of air and fuel. Natural gas is used as fuel. One of the considered injectors provides jet fuel supply by means of a perforated spray, and the other provides twisted fuel supply by means of a swirler built into the fuel channel. The main geometric parameters of the injectors are also given, such as the size of the swirler, the number of blades, and the diameter of the output nozzle.
The design of a heat pipe simulator, in which the tested nozzle is placed, is considered. The design of a bench installation designed for testing injectors in a heat pipe simulator, as well as the modes under which these tests were carried out, is presented. The results were obtained in a heat pipe simulator with installed jet injectors and injectors with a swirling fuel jet. An analysis was conducted, which resulted in conclusions about the effectiveness of the use of jet injectors. According to the conducted research, the parameters of the nozzle with a swirling fuel jet are characterized by the presence of high values of CO and CH levels in the combustion products, which is explained by the extremely low quality of mixing fuel with air and, consequently, low efficiency of fuel combustion. Jet fuel injection has low CO and CH values, which indicates a good quality of fuel mixing with air and high efficiency of combustion organization. As a result, we have received recommendations on setting the selected type of injectors in a full-size combustion chamber.

Keywords:

combustion chamber, gas turbine engine, injector, toxic emissions, fuel supply

References

1. Varnatz J., Maas U., Dibble R. Combustion. Physical and chemical aspects, modeling, experiments, formation of pollutants. [Physical and chemical fundamentals, modeling and simulations, experiments, pollutant formation]. MOSCOW, FIZMATLIT, 2003.   
2. Harrison, W. E., and Zabarnick, S., “The OSD Assured Fuels Initiative— Military Fuels Produced from Coal,” presented at DoE Clean Coal Conference, Clearwater, FL, June 2007.
3. Magnussen, B.F. On the Structure of Turbulence and a Generalized Eddy Dissipation Concept for Chemical Reaction in Turbulent Flow. 19th American Institute of Aeronautics and Astronautics Aerospace Science Meeting. January 12-15, 1981, St. Louis, Missouri, USA, 1981, pp. 1-6.
4. J. Schluter, T.Schonfeld, T.Poinsot, W.Kreds, S.Hoffmann. Characterization of confined swirl flows using large eddy simulations. ASME Turbo Expo 2001, GT2001-0060.
5. A.N. Markushin, A.V. Baklanov.  Testing stands for researching the processes and maturation of low emission combusters. Vestnik of the Samara State Aerospace University. V1. no 3(41), 2013, p. 131-138.
6. A.N. Markushin, A.V. Baklanov.   The  exeaminations of nozzle carburizing for NK’s combustion chamber by kerosene flushing with liquid technical detergent// Trudy MAI, 2018. No. 99. URL: http://trudymai.ru/published.php?ID=91839
7. Markushin A.N., Merkushin V.K., Byshin V.M., Baklanov A.V. Improvement of conventional combustion chamber structure in order to enhance GTE ecological indicators. Izvestiya vysshikh uchebnykh zavedenii aviatsionnaya tekhnika. № 1, 2010, pp. 41-44.
8. Kiesewetter, F., Konle, M., and Sattelmayer, T. “Analysis of Combustion Induced Vortex Breakdown Driven Flashback in a Premix Burner with Cylindrical Mixing Zone,” ASME Journal of Engineering for Gas Turbines and Power, Vol. 129, pp. 929–36, 2007.
9. Lieuwen, T.C. and Yang, V., Combustion Instabilities in Gas Turbine Engines, Progress in Astronautics and Aeronautics, Vol. 210, AIAA, Reston, VA, 2005. 657pp.
10. Lefebvre A.H., Ballal D.R. Gas Turbine Combustion: Alternative Fuels and Emissions, 3rd ed., CRC Press, 2010. 537 pp.
11. V. P. Danilchenko, S. V. Lukachev, J. L. Kovylov. Design of aircraft gas turbine engines. Samara science center of the Russian Academy of Sciences, 2008. p 620.
12. Ashwani K. Gupta, D. G. Lilley, Nick Syred. Swirl Flows. Energy and engineering science series. Abacus Press, 1984, 475 рр.
13. Ланский А.М., Лукачев С.В., Коломзаров О.В. Тенденции изменения геометрических размеров и интегральных параметров камер сгорания малоразмерных газотурбинных двигателей // Вестник Московского авиационного института. 2016. Т. 23. № 3. С.47-57.
14. M. D. Durbin, M. D.Vangsness, D. R.Ballal, V. R.Katta. Study of Flame Stability in a Step Swirl Combustor  // Journal of Engineering for Gas Turbines and Power. – 1996. – Vol. 118. – №. 2. – P. 308- 315.
15. Lefebvre, A. H. Fuel effects on gas turbine combustion-ignition, stability, and combustion efficiency //Am. Soc. Mech. Eng.,(Pap.);(United States). – 1984. – Vol. 84. – №. CONF-840611. 
16. P.Gokulakrishnan, C. C.Fuller, M. S.Klassen, R. G.Joklik, Y. N.Kochar, S. N.Vaden, J. M. Seitzman. Experiments and modeling of propane combustion with vitiation // Combustion and Flame. – 2014. – Vol. 161. – №. 8. – P. 2038-2053.
17. Taylor, S.C. Burning Velocity and the Influence of Flame Stretch , University of Leeds, 1991.
18. T.Yi, E. J.Gutmark Yi, T. Real-time prediction of incipient lean blowout in gas turbine combustors // AIAA journal. – 2007. – Vol. 45. – №. 7. – P. 1734-1739. 
19. Metechko L.B, Tikhonov A.I, Sorokin A.E, Novikov S.V. The Influence of Environmental Norms on the Development of Aviation Engine-Building // Trudy MAI, 2016, No. 85: https://www.mai.ru/science/trudy/published.php?ID=67495.
20. Mingazov B.G.,Yavkin V.В.,Sabirzyanov A.N.,Baklanov A.V. Analysis of combustion models applicability for designing combustion chamber with a large number of nozzles. Vestnik S.P. Korolev SGAU, 2011, No.5(29), pp.208-214. 

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