Shadow particles anemometry method implementation for aerosol characteristics behind the flame tube heads of low-emission gas turbine engines

Аuthors

Siluyanova M. V.^1*, Chelebyan O. G.^2**

1. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
2. Central Institute of Aviation Motors, CIAM, 2, Aviamotornaya St., Moscow, 111116, Russia

*e-mail: dc2mati@yandex.ru
**e-mail: oganes441@gmail.com

Abstract

The process of the liquid fuel atomization and vaporization is of fundamental importance for the GTE combustion chambers effective operation. Normally liquid fuels are insufficiently volatile, and therefore must be dispersed in large numbers of small droplets with an increased evaporation surface area required for the ignition process and combustion of the fuel-air mixture.

The paper presents the results of a new unique shadow particles anemometry method for studying parameters of the flame spraying nozzle unit of low emission combustion chamber (LECC) of the pneumatic type. A detailed description of the PSV measurement method and calculation algorithm when processing the data is presented. The special feature of this method consists in its relation to a method of direct measurement of various aerosols characteristics and provides highly accurate measurements of parameters compared to other methods. PSV method uniqueness consists in the fact that in addition to the spray basic parameters, it allows also define the shape of the particles, by freezing the shadows of droplets images in the measuring volume of camera matrix and high-speed pulsed backlighting. Tests were conducted on a CIAM laser diagnostics workbench in the open space behind the nozzle unit with fuel (kerosene TC-1) pneumo-spraying. During the tests distribution of fuel particles over size and shape at the distance of 30 mm from the nozzle section in the cross-section of spray pattern was obtained. Implementation of a new Shadow particles anemometry method (PSV) allowed verify experimental data, obtained earlier by the phase-Doppler anemometry, and the method itself has demonstrated its efficiency and effectiveness, as measured in terms of dense aerosols.

Keywords:

atomizer module, shadow method, particle diameters, spraying, aerosol

References

1. Lefebvre A.H., Ballal D.R. Gas Turbine Combustion: Alternative Fuels and Emissions. Third Edition. CRC Press, 2010, 538 р.

2. Yagodkin V.I., Golubev A.G., Vasil'ev A.Yu., Sviridenkov A.A. Patent RF 2003107618, 21.03.2003.

3. Yagodkin V.I., Golubev A.G. Trudy TsIAM, 1979, no. 867, pp. 286-292.

4. Saffman M. Optical Particle Sizing Using the Phase of LDA Signals. Dantec Information, 1987, no. 5, pp. 8-13.

5. Amir A. Naqwi, Franz Durst Light Scattering Applied to LDA and PDA Measurements. Particle & Particle Systems Characterization, 1991, no. 8, pp. 245-258.

6. Glantschnig W.J., Chen S. Light scattering from water droplets in the geometrical optics approximation. Applied Optics, 1981, vol. 20, no. 14, pp. 2499-2509.

7. Estevadeordal J., Goss L. PIV with LED: Particle Shadow Velocimetry (PSV). 43rd AIAA Aerospace Sciences Meeting and Exhibit, Meeting Papers, 2005, pp. 12355-12364.

8. Chelebyan O.G., Siluyanova M.V. Vestnik Moskovskogo aviatsionnogo instituta, 2016, vol. 23, no. 4, pp. 86-94.

9. Vasil'ev A.Yu., Chelebyan O.G. Patent RF № 2439430, 10.01.2012.

10. Siluyanova M.V., Chelebyan O.G. Trudy MAI, 2016, no. 87, available at: http://www.mai.ru/science/trudy/published.php?ID=69695 (accessed 31.05.2016).