Abstract
The interaction of two parallel plane jets of different velocities is studied by flow visualization and PIV measurement to examine the influence of velocity ratio on the development ofjets in the initial region. It is found that the parallel plane jets develop toward the high velocity side and the jet width is reduced with a decrease in the jet velocity ratio. Corresponding to the variation of mean velocity field to the velocity ratio, the magnitudes of turbulence intensities, Reynolds stress and static pressure are weakened in the merging region of the jets and their peak locations of the properties are shifted to the high velocity side. These results indicate that the interaction of two parallel jets is weakened with a decrease in the velocity ratio of the jets.
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References
Everitt, K. Wand Robins, A. G., The Development and Structure of Turbulent Plane Jets, Journal of Fluid Mechanics, 88 (1978), 563–583.
Fujisawa, N. and Sato, A, Evaluation of Three-dimensional Flow and Pressure Fields in a Cold Model of Combustion Chamber by Plane PIVMeasurements, Proc. 4th Internatiaual Symposium on PIV (Goettingen), (2001), Pa.1072.
Gurka, R., Liberzon, A, Hefetz, D., Rubinstein, D. and Shavit, U’., Computation of Pressure Distribution Using PIV Velocity Data, Proc. 3rd International Symposium PIV (Santa Barbara), (1999), 671–676.
Ko, N. W. M. and Lau, K. K., Flow Structures in Initial Region of Two Interacting Parallel Plane Jets, Experimental Thermal and F luid Science, 2 (1989), 431–449.
Kobayashi, R. and Fujisawa, N., Curvature Effects on Two-dimensional Turbulent Wall Jets, Ingenieur Archiv, 53 (1983), 409–417.
Lin, Y. F. and Sheu, M. J., Interaction of Two Plane Parallel Unventilated Jets, Experiments in Fluids, 10 (1990), 17–22.
Miller, D. R. and Comings, E. W., Force-momentum Fields in a Dual-jet Flow, Journal ofFluid Mechanics, 7 (1960), 237–256.
Murai, K., Taga, M. and Akagawa, K., An Experimental Study au Confluence of Two Two-dimensional Jets, Bulletin of JSME, 19 (1976), 958–964.
Nasr, A. and Lai, J. C. S., Two Parallel Plane Jets: Mean Flow and Effects of Acoustic Excitation, Experiments in Fluids, 22 (1997a),251–260.
Nasr, A. and Lai, J. C. S., Comparison ofFlow Characteristics in the Near Field ofTwo Parallel Plane Jets and an Offset Plane Jet, Physics of Fluids, 9 (1997b), 2919–2931.
Tanaka, E., The Interference of Two-dimensional Parallel Jets: Experiments on Dual Jet, Bulletin of J SME, 13 (1970), 272–280.
Tomimatsu, S., Fujisawa, N. and Hosokawa, A., PIVMeasurement of Velocity Field in Spray Combustor, Journal Visualization, 6 (2003), 273–281.
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Nobuyuki Fujisawa: After graduating from Tohoku University (D.E. 1983), he joined Gunma University in 1983 and worked as an associate professor since 1991. He has been a professor ofNiigata University since 1997 and is continuing research on the visualization and non-intrusive measurement of velocity, temperature and shear stress in mechanical engineering.
Koichi Nakamura: He was educated at Niigata University (B.E. 2001). He is now studying at Graduate School ofNiigata University and continuing research on interaction ofjets.
Srinivas Karkenahalli: He is a Senior Lecturer at the School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Australia. His interests are optimization of aerodynamic shapes using evolutionary algorithms and computational fluid dynamics.
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Fujisawa, N., Nakamura, K. & Srinivas, K. Interaction of two parallel plane jets of different velocities. J Vis 7, 135–142 (2004). https://doi.org/10.1007/BF03181586
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DOI: https://doi.org/10.1007/BF03181586