Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Investigation on the Unsteadiness of a Low Reynolds Number Confined Impinging Jet using POD Analysis

POD 기법을 이용한 저 레이놀즈 수 충돌 제트의 비정상 거동 연구

  • 안남현 (거제대학 조선선박기술계열) ;
  • 이인원 (부산대학교 첨단조선공학연구센터)
  • Published : 2008.06.30
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Abstract

The flow characteristics in a confined slot jet impinging on a flat plate were investigated in low Reynolds number regime (Re$\leq$1,000) by using time-resolved particle image velocimetry technique. The jet Reynolds number was varied from 404 to 1026, where it is presumed that the transient regime exists. It is found that the vortical structures in the shear layer are developed with increasing Reynolds number and that the jet remains steady at the Reynolds number of 404. Vortical structures and their temporal evolution are verified and the results were compared with previous numerical studies.

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References

  1. Bi, W., Sugii, Y., Okamoto, K. and Madarame, H., 2003, "Time-resolved proper orthogonal decomposition of the near-field flow of a round jet measured by dynamic particle image velocimetry," Measurement Science and Technology, vol. 14, pp.L1-L5. https://doi.org/10.1088/0957-0233/14/8/101
  2. Beitelmal, A. H., Saad, M. A. and Patel, C. D., 2000, "The Effect of Inclination on the Heat Transfer Between a Flat Surface and Impinging Two-dimensional Air Jet," Int. J. Heat Fluid Flow, vol.18, pp.597-605.
  3. Berkooz, G., Holmes, P. and Lumley, J., 1993, "The proper orthogonal decomposition in the analysis of turbulent flows," Ann. Rev. Fluid. Mech., vol.25, pp.539-575. https://doi.org/10.1146/annurev.fl.25.010193.002543
  4. Chiriac, V. C. and Ortega, A., 2002, "Numerical Study of Unsteady Flow and Hear transfer in a Transitional Confined Slot Jet Impinging on an Isothermal Surface," Int. J. Heat Mass Transfer, vol.45, pp.1237-1248.125 https://doi.org/10.1016/S0017-9310(01)00224-1
  5. Chung, Y. M., Luo, K. H. and Sandham, N. D., 2002, "Numerical Study of Momentum and Heat Transfer in Unsteady Impinging Jets," Int. J. Heat Fluid Flow, vol.23, pp.592-600. https://doi.org/10.1016/S0142-727X(02)00155-8
  6. Didden, N. and Ho, C.-M., 1985, "Unsteady separation in a boundary layer produced by an impinging jet," J. Fluid Mech., vol.160, pp.235-256. https://doi.org/10.1017/S0022112085003469
  7. Karhunen, K., 1946, "Zur spektraltheorie stochasticher," Annales Academiae Scientiarum Fennicae Series A, vol.1, p.34.
  8. Olsson, M. and Fuchs, L., 1998, "Large eddy simulations of a forced semiconfined circular impinging jet," Phys. Fluids, vol.10, no. 2, pp.476-486. https://doi.org/10.1063/1.869535
  9. Sirovich, L., 1987, "Turbulence and the dynamics of coherent structures," Quarterly of Applied Mathematics, vol. 45, no. 3, pp.561-590.
  10. Sparrow, E. M. and Wong, T. C., 1975, "Impingement Transfer Coefficients due to Initially Laminar Slot Jets," Int. J. Heat Mass Transfer, vol. 18, no. 5, pp.597-605. https://doi.org/10.1016/0017-9310(75)90271-9
  11. Vetel, J., Farinas, M.-I., Garon, A. and Pelletier, D., 2006, "Characterization of a Diffuser Flow by Time- Resolved PIV," Journal of Visualization, vol. 9, no. 2, pp.219-226