Abstract
The instantaneous and ensemble averaged flow characteristics of a round jet issuing normally into a crossflow was studied using a flow visualization technique and Particle Image Velocimetry measurements. Experiments were performed at a jet-to-crossflow velocity ratio, 3.3 and two Reynolds numbers, 1,050 and 2,100, based on crossflow velocity and jet diameter. Instantaneous laser tomographic images of the vertical center plane of the crossflow jet show that there exists very different natures in the flow structures of the near field jet due to Reynolds number effect even though the velocity ratio is same. It is found that the shear layer becomes much thicker when the Reynolds number is 2,100 because of the strong entrainment of the inviscid fluid by turbulent interaction between the jet and crossflow. The mean and second order statistics are calculated by ensemble averaging over 1,000 realizations of instantaneous velocity fields. The detail characteristics of mean flow field, streamwise and vertical rms velocity fluctuations, and Reynolds shear stress distributions are presented. The new PIV results are compared with those from previous experimental and LES studies.
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References
Andreopoulos, J. and Rodi, W., On the Structure of Jets in Crossflow, J. Fluid Mech., 157 (1984), 163–197.
Crabb, D., Durao, D. F. G. and Whitelaw, J. H., A round jet normal to a crossflow, J. Fluids Engineering, 103 (1981), 142–153.
Fric, T. F. and Roshko, A., Vortical Structure in the Wake of a Transverse Jet, J. Fluid Mech., 279 (1994), 1–147.
Kelso, R. M., Lim, T. T. and Perry, A. E., An Experimental Study of Round Jets in Cross-flow, J. Fluid Mech., 306 (1996), 111–144.
Kim, K. C. and Shin, D. S., A Study on the Topology of Shear Layer Vortex Structure in a Cross Flow Jet Using a Laser Tomographic Visualization Method, 98VSJ-SPIE, AB-057 (1998).
Margason, R. J., Fifty Years of Jet in Crosflow Research, In Computational and Experimental Assessment of Jets in Cross Flow, AGARD-CP-534, Winchester, UK (1993).
Pratte, B. P. and Baines, W. D., Profiles of the Round Turbulent Jet in a Crossflow, Journal of the Hydraulics Division, Proc. of the ASCE, HY (6) (1967), 56–63.
Sherif, S. A. and Pletcher, R. H., Measurements of the Flow and Turbulence Characteristics of Round Jets in Crossflow, J. Fluids Engineering, 111 (1989), 165–171.
Yuan, L. L., Street, R. L. and Ferziger, J. H., Large Eddy Simulations of a Round Jet in Crossflow, J. Fluid Mech., 379 (1999), 71–104.
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Kyung Chun Kim: He was educated at Pusan National University(B.A. 1979) and at Korea Advanced Institute of Science and Technology(M.S. 1981, Ph.D 1987) in Korea. His research interests are the identification of turbulence structures in complex flows, wind engineering and turbulent convective heat transfer using various types of experimental methods including PIV technique. He is a professor of school of mechanical engineering at Pusan National University, and director of the laboratory for Applied Fluid Mechanics in PNU.
Sang Ki Kim: He received his bachelor(1990) and master(1993) of engineering degrees in mechanical engineering from Pusan National University in Korea. He is currently pursuing a Ph.D under the supervision of Prof. K. C. Kim in the area of turbulent flow.
Sang Youl Yoon: He received his bachelor(1998) and master(2000) of engineering degrees in mechanical engineering from Pusan National University in Korea. He is currently pursuing a Ph.D under the supervision of Prof. K.C.Kim in the area of micro-fluidics.
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Kim, K.C., Kim, S.K. & Yoon, S.Y. PIV measurements of the flow and turbulent characteristics of a round jet in crossflow. J Vis 3, 157–164 (2000). https://doi.org/10.1007/BF03182408
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DOI: https://doi.org/10.1007/BF03182408