Suppression of vortex core precession in a swirling reacting flow
- Authors: Litvinov I.V.1,2, Nazarov A.V.1, Shtork S.I.1,2
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Affiliations:
- Kutateladze Institute of Thermophysics SB RAS
- Novosibirsk State University
- Issue: Vol 23, No 2 (2016)
- Pages: 305-308
- Section: Brief Communications
- URL: https://journals.rcsi.science/1531-8699/article/view/216431
- DOI: https://doi.org/10.1134/S0869864316020190
- ID: 216431
Cite item
Abstract
The influence of combustion effect on unsteady vortex structure in the form of precessing vortex core was studied using the non-intrusive method of laser Doppler anemometry and special procedure of extracting the non-axisymmetric mode of flow fluctuations. The studies show that combustion has a significant effect on the parameters of such a core, reducing the amplitude (vortex deviation from the burner center) and increasing precession frequency. At the same time, the acoustic sensors detect almost an order reduction in the level of pressure pulsations generated by the precessing vortex core. Moreover, distributions of tangential velocity fluctuations and cross-correlation analysis show that vortex precession is quite pronounced even under the combustion conditions, bringing a significant coherent component to distributions of velocity fluctuations.
About the authors
I. V. Litvinov
Kutateladze Institute of Thermophysics SB RAS; Novosibirsk State University
Author for correspondence.
Email: litvinov@itp.nsc.ru
Russian Federation, Novosibirsk; Novosibirsk
A. V. Nazarov
Kutateladze Institute of Thermophysics SB RAS
Email: litvinov@itp.nsc.ru
Russian Federation, Novosibirsk
S. I. Shtork
Kutateladze Institute of Thermophysics SB RAS; Novosibirsk State University
Email: litvinov@itp.nsc.ru
Russian Federation, Novosibirsk; Novosibirsk