TY - GEN

T1 - Coherent structures in a swirling jet with vortex breakdown and combustion. Investigation by PIV and PLIF

AU - Lobasov, A. S.

AU - Chikishev, L. M.

AU - Dulin, V. M.

AU - Markovich, D. M.

N1 - Funding Information: The research is supported by Russian Science Foundation (grant № 16-19-10566). The authors are grateful to Prof. Kemal Hanjalic for fruitful discussions and recommendations. Publisher Copyright: © 2018 Begell House, Inc.

PY - 2018

Y1 - 2018

N2 - This paper reports on the investigation of coherent structures in a high-swirl jet with vortex breakdown (Re = 5 000) and combustion of a methane/air mixture (with equivalence ratio equal to 0.7 and 1.4). The measurements were performed by a combined application of the stereo PIV, OH PLIF and HCHO PLIF techniques. The velocity data were processed by the proper orthogonal decomposition (POD) and the PLIF data was conditionally sampled according to the POD correlation coefficients. For the non-reacting jet and lean flame, the POD has revealed presence of a coherent structure, consisted of helical vortex structures in the inner and outer mixing layers. Based on the PLIF data it was found that the inner spiraling vortex structure was correlated with regions of positive fluctuations of the local heat release.

AB - This paper reports on the investigation of coherent structures in a high-swirl jet with vortex breakdown (Re = 5 000) and combustion of a methane/air mixture (with equivalence ratio equal to 0.7 and 1.4). The measurements were performed by a combined application of the stereo PIV, OH PLIF and HCHO PLIF techniques. The velocity data were processed by the proper orthogonal decomposition (POD) and the PLIF data was conditionally sampled according to the POD correlation coefficients. For the non-reacting jet and lean flame, the POD has revealed presence of a coherent structure, consisted of helical vortex structures in the inner and outer mixing layers. Based on the PLIF data it was found that the inner spiraling vortex structure was correlated with regions of positive fluctuations of the local heat release.

UR - http://www.scopus.com/inward/record.url?scp=85137490614&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/0ce9710d-ed55-3ff3-8e89-23f39bf00b51/

U2 - 10.1615/THMT-18.170

DO - 10.1615/THMT-18.170

M3 - Conference contribution

AN - SCOPUS:85137490614

SN - 9781567004687

T3 - Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer

SP - 213

EP - 225

BT - THMT 2018 - Proceedings of the 9th International Symposium on Turbulence Heat and Mass Transfer

PB - Begell House Inc.

T2 - 9th International Symposium on Turbulence Heat and Mass Transfer, THMT 2018

Y2 - 10 July 2018 through 13 July 2018

ER -