Correlation of measurements OH*, CH*, C2* and H2O with changing signal of Electrical Capacitance Tomography system in the reaction zone of methane/ air premixed flames

• Autorzy: Gut Zbigniew
• Języki publikacji: EN

Abstrakty

EN

Research into the application of Electrical Capacitance Tomography (ECT) carried out in the Laboratory of the Aircraft Engines Division at Warsaw University of Technology has shown that it is applicable to recognition of various flames. Several cases were tested using the ECT system and the system successfully created cross sectional images of premixed and diffusion flames. Studies were then conducted which significantly increased the functionality of the system. This article describes experimental studies that afforded insight into the effects of the degree of ionization generated during the combustion process on the changing signal of the ECT system. Research was carried out in an experimental stand consisting of a burner, 6 and 12 electrodes capacitance sensors and an optical spectrometer. Burner injection was used to obtain stability of combustion. Two rotameters were installed in the inlet of the burner. The flow rate of air and methane was used to determine the composition of the combustible mixture formed in the mixing chamber. A grating spectrometer was used to perform a detailed analysis of combustion processes and to detectvarious types radicals. This experimental test focused on measuring chemiluminescence intensities and possible correlations of the OH*, CH*, C2* and H2O with air/ methane ratio. The data from the ECT system and optical spectrometer was then analyzed. It was found that the strong correlations between the peak intensity of OH*, CH*, C2* and H2O in the reaction zone to the equivalence ratio could be used to investigate the local flame stoichiometry.

Słowa kluczowe

EN

combustion process; visualization; tomography; spectrometer

PL

spalanie; proces spalania; wizualizacja; tomografia; spektrometr

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2020
• Tom: Vol. 100, nr 3
• Strony: 179--187
• Opis fizyczny: Bibliogr. 22 poz., fot., rys., tab., wykr.

Twórcy

autor

Gut Zbigniew

• Institute of Aviation, Center of Space Technologies, Space Technologies Division, al. Krakowska 110/114, 02-256 Warsaw, Poland

Bibliografia

• 1. Taylor, H. G., and Waldram, J. M. (1933) Improvements in the schlieren method. Journal of Scientific Instruments,10.
• 2. R. South, B. M. H. (1976) Temperature Measurement in Conical Flames by Laser Interferometry. Combustion Science and Technology,12.
• 3. Seitzman, J. M., Kychakoff, G., and Hanson, R. K. (1985) Instantaneous temperature field measurements using planar laser-induced fluorescence. Opt Lett, 10, 439-441.
• 4. Blizard, N., and Keck, J. (1974) Experimental and Theoretical Investigation of Turbulent Burning Modelfor Internal Combustion Engines. SAE Technical Paper 740191.
• 5. Yoshiyama, S., and Tomita, E. (2002) Combustion Diagnostics of a Spark Ignition Engine Using a Spark Plug as an Ion Probe. SAE Technical Paper Series.
• 6. (1989) Tomographic imaging of two-component flow using capacitance sensors. Journal of Physics E: Scientific Instruments, 22.
• 7. (2001) Electrical capacitance tomography measurements on the pneumatic conveying of solids. Industrial & Engineering Chemistry Research, 40.
• 8. A. J. Jaworski, T. D. (2001) Measurement Scienceand Technology Application of electrical capacitancetomography for measurement of gas-solids flow characteristics in a pneumatic conveying system. Measurement Science and Technology,12.
• 9. (2006) Application of electrical capacitance tomography for bulk solids flow analysis in silos. Particle and Particle Systems Characterization, 23.
• 10. Liu, S., Wang, H., Jiang, F., and Yang, W. Q. (2002) A new image reconstruction method for tomographic investigation of fluidized beds. AIChE Journal, 48 (8), 1631-1638.
• 11. Z. Gut (2016) Selected application of electrical capacitance tomography in monitoring of combustion process. Transactions of the Institute of Aviation, 4.
• 12. Waterfall, R.C. (2000) Imaging combustion using electrical capacitance tomography. IEE Seminar on Advanced Sensors and Instrumentation Systems for Combustion Processes.
• 13. Chen, Q., and Liu, S. (2012) Flame Imaging in Meso-scale Porous Media Burner Using Electrical Capacitance Tomography. Chinese Journal of Chemical Engineering, 20 (2), 329-336.
• 14. Lawton J., W. F. J. (1969) Electrical Aspects of Combustion, Clarendon Press, Oxford, UK.
• 15. Kojima, J., Ikeda, Y., and Nakajima, T. (2005) Basic aspects of OH(A) CH(A), and C2(d) chemiluminescence in the reaction zone of laminar methane-air premixed flames. Combustion and Flame, 140 (1-2), 34-45.
• 16. Panoutsos, C., Hardalupas, Y., and Taylor, A. (2009) Numerical evaluation of equivalence ratio measurement using OH* and CH* chemiluminescence in premixed and non-premixed methane-airflames.Combustion and Flame, 156 (2), 273-291.
• 17. Ikeda, Y., Kojima, J., Nakajima, T., Akamatsu, F., and Katsuki, M. (2000) Measurement of the local flame front structure of turbulent premixed flames by local chemiluminescence. Proceedings of the Combustion Institute, 28 (1), 343-350.
• 18. Bowman, C. T., and Seery, D. J. (1968) Chemiluminescence in the high-temperature oxidation of methane. Combustion and Flame, 12 (6), 611-614.
• 19. Docquier, N., and Candel, S. (2002) Combustion control and sensors: a review. Progress in Energy and Combustion Science, 28 (2), 107-150.
• 20. Dandy, David S., and Vosen, Steven R. (1992) Numerical and Experimental Studies of Hydroxyl Radical Chemiluminescencein Methane-Air Flames. Combustion Science and Technology, 82 (1-6), 131-150.
• 21. Yang, Y., and Peng, L. (2013) A configurable electrical capacitance tomography system using a combining electrode strategy. Measurement Science and Technology, 24 (7), 074005.
• 22. Ye, J., Wang, H., and Yang, W. (2016) Evaluation of electrical capacitance tomography sensor based on the coupling of fluid field and electrostatic field. Measurement Science and Technology, 27 (7), 074003.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).