2015 1(16)

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   Short abstract

 

Pages:

227 - 231

Language:

RU

Ref.:

6


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2015_1(16)_43.pdf

 

 

NONSTATIONARY COMBUSTION MODES OF TANGENTIAL VORTEX BURNER

Nazarov A.V., Litvinov I.V.

Institute of Thermophysics SB RAS, Novosibirsk, Russia


Citation:

Nazarov, A.V. and Litvinov, I.V., (2015) Nonstationary combustion modes of tangential vortex burner, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(16), PP. 227 - 231.


Keywords:

swirling flow; burner; pressure pulsation; velocity profile; thermoacoustic oscillation; PVC


Abstracts:

The paper presents the experimental investigation of the combustion process of propane-air mixture in the tangential burner device on 10% of power, which has two tangential inlets for supply of air-fuel mixture, and constrictive nozzle with 30 mm diameter. The paper presents the distribution of the mean and fluctuating velocity components of swirling flow, and spectra and cross-correlation functions of pressure pulsation at the nozzle exit of the burner are shown. Several modes of combustion is shown to occur with difference in the form and pattern of combustion. Generation of strong pressure pulsations was found to occur in the flame with the Reynolds number in the range 9300 ... 19400, which was changed with the volumetric flow rate of air in the supply system, and φ≈0,6. It is caused by the thermoacoustic oscillation and not related with the formation of the precessing vortex core (PVC) like at isothermal combustion.


References:

  1. Zhengqi Li, Song Li, Qunyi Zhu, Xiqian Zhang, Guipeng Li, Yong Liu, Zhichao Chen and Jiangquan Wu (2014) "Effects of particle concentration variation in the primary air duct on combustion characteristics and NOx emissions in a 0.5-MW test facility with pulverized coal swirl burners", Applied Thermal Engineering, Vol.73, no.1, pp. 859 - 868.

  2. Pożarlik, A. (2010), "Vibro-acouustical instabilities induced by combustion dynamics in gas turbine combustors", PhD thesis, University of Twente, Enschede, The Netherlands.

  3. Syred N. A review of oscillation mechanisms and the role of the precessing vortex core (PVC) in swirl combustion systems // Prog. Energy Combust. Sc. - 2006. - Vol. 32(2). - P. 93-161.

  4. Moeck J.P., Jean-François Bourgouin, Daniel Durox, Thierry Schuller and Sébastien Candel (2012) "Nonlinear interaction between a precessing vortex core and acoustic oscillations in a turbulent swirling flame", Combustion and Flame, Vol.159, pp. 2650 - 2668.

  5. Litvinov I.V., Shtork S.I., Kuibin P.A., Alekseenko S.V., Hanjalic K. Experimental study and analytical reconstruction of precessing vortex in a tangential swirler // International Journal of Heat and Fluid Flow. - 2013. - Vol. 42. - Р. 251-264.

  6. A.K. Gupta, D.G. Lilley, N. Syred, Swirl flows. Abacus Press, Kent, England, 1984, p 475

 

 
     

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