Static and dynamic characteristics of turbulent flow in a closed compound channel

Authors

  • Jhon N. V. Goulart Universitdad de Brasilia
  • Carla T. M. Anflor Universidad de Brasilia
  • Sergio V. Möller Universidad del Rio Grande do Sul

Keywords:

Compound channels, mixing layer, hot-wire anemometry, coherent structures

Abstract


The hot-wire anemometry technique was employed to study the velocity distribution and dynamic characteristics of the flow in two types of closed compound channels. The compound channels were built using two rectangular tubes attached to the walls of a wind channel separated by a distance d. In this configuration, a narrow gap is connected to a main subchannel. The results revealed an interesting flow that was quite similar to a mixing layer. All axial velocity profiles presented turning points at the main subchannel/ narrow gap interface. By using quantities from the mean flow velocity distribution, the flow could be described by a hyperbolic tangent function, and a Strouhal number was suggested as well. Regardless of the channel type, the dimensionless frequency was almost constant, resulting in a Strouhal number of approximately 0.10.

|Abstract
= 9 veces | PDF (ESPAÑOL (ESPAÑA))
= 12 veces|

Downloads

Download data is not yet available.

References

L. Meyer. “From Discovery to Recognition of Periodic Large Scale Vortices in Rod Bundles as Source of Natural Mixing Between Subchannels—A review”. Nuclear Engineering and Design. Vol. 240. 2010. pp. 1575-1588.

D. Knight, K. Shiono. “Turbulence Measurements in a Shear-layer Region of a Compound Channel”. Journal of Hydraulic Research. Vol. 28. 1990. pp. 175-196.

L. Soldini, A. Brocchini, M. Mancinelli, R. Bernetti. “Macrovortices-Induced Horizontal Mixing in Compound Channels”. Ocean Dynamics. Vol. 54. 2004. pp. 333-339.

L. Meyer, K. Rehme. “Large-scale Turbulence Phenomena in Compound Rectangular Channels”. Experimental Thermal and Fluid Science. Vol. 8. 1994. pp. 286-304.

X. Wu, A. Trupp. “Spectral Measurements and Mixing Correlations in a Simulated Rod Bundle Subchannels”. Int. J. Heat Transfer. Vol. 37.1994. pp. 1277-1281.

M. Guellouz, S. Tavoularis. “The Structure of the Turbulent Flow in a Rectangular Channel Containing a Single Rod – Part 1: Reynolds-Average measurements”. Exp. Thermal and Fluid Sci. Vol. 23. 2000. pp. 59-73.

E. Pitot, S. Tavoularis. “Gap instability of laminar flows in eccentric annular channels”. Nuclear Engineering and Design. Vol. 241. 2011. pp. 4615-4620.

D. Rowe, B. Johnson, J. Knudsen. “Implications Concerning Rod Bundle Crossflow Mixing Based on Measurements of Turbulent Flow Structure”. Int. J. Heat Mass Transfer. Vol. 17. 1974. pp. 407-419.

S. Möller. “On Phenomena of Turbulent Flow Through Rod Bundles”. Experimental Thermal and Fluid Science. Vol. 4. 1991. pp. 25-35.

L. Meyer, K. Rehme. Periodic Vortices in Flow Through Channels with Longitudinal Slots or Fins. Proc.10th Symposium on Turbulent Shear Flows. The Pennsylvania State University. Pennsylvania, USA. August 14-16, 1995.

J. Goulart, S. Möller. Shear flow in compound channels.Proc. 19th International Congress of Mechanical Engineering – COBEM. Brasilia, Brazil. November 5-9. 2007.

D. Collis, M. Williams. “Two-dimensional Convection from Heated Wires at low Reynolds Numbers”. J. Fluid Mech. Vol. 6. 1959. pp. 357-384.

M. Lesieur. Turbulence in Fluids. 3rd ed. Ed. Kluwer Academic Publishers. Dordrecht, The Netherlands. 1997. pp. 91-107.

B. van Prooijen, W. Uijttewaal. “A linear Approach for the Evolution of Coherent Structures in Shallow Mixing Layers”. Physics of Fluids. Vol. 14. 2002. pp. 4105-4114.

A. Townsend. The structure of turbulent shear flow.1st ed. Ed. Cambridge University Press. Cambridge, England. 1976. pp. 188-230.

W. Yang, H. Zhang, C. Chan, K. Lau, W. Lin. “Investigation of plane mixing layer using large eddy”. Computational Mechanics. Vol. 34.2004. pp. 423-429.

J. Bell, R. Mehta. “Two-Stream Mixing Layer from Boundary Layers”. AIAA Journal. Vol. 28. 1990. pp. 2034-2042.

S. Souza, J. Goulart. “Numerical Analysis of Developing Turbulent Flow in a Closed compound Channel.” Thermal Engineering. Vol. 10. 2011. pp. 81-87.

D. Chang, S. Tavoularis. “Numerical Simulation of Developing Flow and Vortex Street in a Rectangular Channel with a Cylindrical Core.” Nuclear Engineering and Design. Vol. 243. 2012. pp. 176-199.

K. Rehme. “The Structure of Turbulence in rod Bundles and the Implications on Natural Mixing Between Subchannels”. Int. J. Heat Transfer. Vol. 35. 1992. pp. 567-581.

Published

2013-10-24

How to Cite

N. V. Goulart, J., T. M. Anflor, C., & V. Möller, S. (2013). Static and dynamic characteristics of turbulent flow in a closed compound channel. Revista Facultad De Ingeniería Universidad De Antioquia, (68), 124–135. Retrieved from https://revistas.udea.edu.co/index.php/ingenieria/article/view/17219