DOI QR코드

DOI QR Code

점탄성 유동벽면의 파동 감쇠 특성 해석

Analysis of Wave Decay Characteristics of Viscoelastic Compliant Coating

  • ;
  • 정광효 (부산대학교 참단조선공학연구센터) ;
  • 전호환 (부산대학교 참단조선공학연구센터) ;
  • 이인원 (부산대학교 참단조선공학연구센터)
  • 발행 : 2006.12.01

초록

Calculation was carried out for phase velocity and deformation wave decay in a layer of viscoelastic material fixed tightly on the solid substrate. Analysis has been performed regarding the inner structure of the wave, i.e., the proportions between the vertical and horizontal displacements and their profiles. The wave characteristics depend strongly on media compressibility factor. The effect of viscous losses on parameters of the main oscillation mode was studied in detail. Results were compared with the model of coating with local deformation. A new experimental approach was made in order to measure such wave properties of a compliant coating as the dependency of deformation wave velocity on frequency and decay factor was made. The method for estimation of coating parameters enabling the drag reduction in turbulent flow was then refined.

키워드

참고문헌

  1. Kramer, M. O., 1957, 'Boundary Layer Stabilization by Distributed Damping,' J. Aero. Sci., Vol. 24, No. 6, pp. 459-460
  2. Kulik, V. M., Poguda, I. S. and Semenov, B. N., 1991 'Experimental Investigation of One-layer Viscoelastic Coating Action on Turbulent Friction and Wall Pressure Pulsations,' Recent Developments in Turbulence Management (ed. K-S. Choi), Kluwer, pp. 263-289
  3. Choi, K.-S., Yang, X., Clayton, B. R., Glover, E. J., Atlar, M., Semenov, B. N. and Kulik, V. M., 1997, 'Turbulent Drag Reduction Using Compliant Surfaces,' Proc. Roy. Soc. London A, Vol. 453, pp. 2229-2240 https://doi.org/10.1098/rspa.1997.0119
  4. Kulik, V. M., Rodyakin, S. V., Suh, S-B., Lee, I. and Chun, H. H., 2005, 'The Response of Compliant Coating to Non-stationary Disturbances,' Physics of Fluids, Vol. 17, No. 8, pp. 088104 1-4 https://doi.org/10.1063/1.2011467
  5. Semenov, B. N., 1991, 'On Conditions of Modelling and Choice of Viscoelastic Coatings for Drag Reduction,' Recent Developments in Turbulence Management, Kluwer, pp. 241-262
  6. Kulik, V. M., Rodyakin, S. V., Lee, I. and Chun, H. H., 2005, 'Deformation of a Viscoelastic Coating Under the Action of Convective Pressure Fluctuations,' Experiments in Fluids, Vol. 38, No. 5, pp. 648-655 https://doi.org/10.1007/s00348-005-0947-y
  7. Landau, L. D. and Lifschitz, E. M., 1986, 'Theory of Elasticity,' 3rd ed., Pergamon Press, Oxford, pp. 87-90
  8. Gad-el-Hak, M., Blackwelder, R. F. and Riley, J. J., 1984, 'On the Interaction of Compliant Coatings with Boundary Layer Flows,' J. Fluid Mech., Vol. 140, pp. 257-280 https://doi.org/10.1017/S0022112084000598
  9. Lee, T., Fisher, M. and Schwarz, W. H., 1995, 'Investigation of the Effects of a Compliant Surface on Boundary-layer Stability,' J. Fluid Mech., Vol. 288. pp. 37-58 https://doi.org/10.1017/S0022112095001054
  10. Fox, R. W. and McDonald, A. T., 1985, 'Introduction to Fluid Mechanics,' 3rd ed., John Wiley & Sons, pp. 447-449

피인용 문헌

  1. Measurement Method of Broadband Dynamic Characteristics of Viscoelastic Material for Compliant Coating vol.45, pp.1, 2008, https://doi.org/10.3744/SNAK.2008.45.1.73