DOI QR코드

DOI QR Code

Experimental Study of Wall Pressure Fluctuations in the Regions of Flow Transition

천이 경계층 유동의 벽면 변동 압력에 관한 실험적 연구

  • Published : 2002.04.01

Abstract

It has been long suspected that the transition region may give rise to local pressure fluctuations and radiated sound that are different from those created by the fully-developed turbulent boundary layer at equivalent Reynolds number. Experimental investigation described in this paper concerns the characteristics of pressure fluctuations at the transition. Flush-mounted microphones and hot wires are used to measure the pressure fluctuations and local flow velocities within the boundary layer in the low noise wind tunnel. From this experiment we could observe the spatial and temporal development process of T-S wave using Wigner-Ville method and find the relations between the characteristic frequency of T-S wave and free stream velocity and the boundary layer thickness based on nondimensional pressure spectra scaled on outer variables.

Keywords

References

  1. Lauchle, G. C., 1980, "On the Radiate Noise Due to Boundary Layer Transition," JASA, Vol 67, No. 1, pp. 158-167. https://doi.org/10.1121/1.384474
  2. Lauchle. G. C., 1977, "Noise Generated by Axisymmetric Turbulent Boundary Layer Flow," JASA, Vol. 61, No. 3, pp. 694-703 https://doi.org/10.1121/1.381356
  3. Arakerie, V. H., Satyanarayana, S. G., Mani, K. and Sharma, S. D.. 1991, "Studies on Scaling of Flow Noise Received at the Stagnation Point of Axisymmetric Body," JSV, Vol. 146, No. 3. pp.449-462 https://doi.org/10.1016/0022-460X(91)90701-K
  4. Arakerie, V. H., 1975, "A Note on the Transition Observations on an Axisymmetric Body and Some Related Fluctuating Wall Pressure Measurements," Trans. ASME J. Fluids Eng., Vol. 97, p. 82. https://doi.org/10.1115/1.3447222
  5. Huang, T. T. and Shen, Y. T., 1989, "Wall-pressure Fluctuations in Adverse-pressure Gradients Transition Regions," ASME NCA, Vol. 5, p. 5.
  6. Katz, R. A., Galib, T. A. and Cembrola, J. M., 1989, "Classical and Nonlinear Analysis of Transitional and Turbulent Boundary Layer Flow," ASME NCA, Vol. 5, p. 179.
  7. Perraud, J. C., 1989, "Studies of Laminar-turbulent Transition in Air and Water Wall Pressure Fluctuations and Acoustic Emission from the Turbulent Intermittency," ASME NCA, Vol. 5, p. 17.
  8. Abarbanel, H. D., Katz, R. A. and Frison, T. W., 1994, "Nonlinear Analysis of High Reynolds Number over a Buoyant Axisymmetric Body," Physical Review, Vol. 49, No. 5, pp. 4003-4018 https://doi.org/10.1103/PhysRevB.49.4003
  9. 신구균, 홍진숙, 김상윤, 김상렬, 박규철, 2000, "축대칭 몰수체 선단에서 발생하는 경계층 내 벽면변동 압력에 관한 연구," 한국소음진동공학회지, 제10 권 제 4 호, pp. 602-609.
  10. Goldstein. M. E. and Hultgren, L. S., 1987, "A Note on the Generation of Tollmien-Schlichting Waves by Sudden Surface-curvature," J. of Fluid Mechanics, Vol. 181, pp. 519-525. https://doi.org/10.1017/S0022112087002192
  11. 김재승 외, 1998. "저소음 풍동을 이용한 축대칭 몰수체의 유체소음 시험," NWSD-417-980039, 국방과학연구소.
  12. Arnal, D., Juillen, J. C. and Michel, R., 1977, "Analyse Experimentale et Calcul de I'Apparition et du DeveIoppement de la Transition de la Couche Limite," AGARD CP 224, 13-1.
  13. Lueptow, R. M., 1993, "Wall Pressure Transducer Spatial Resolution," ASME NCA- Vol. 15, FED-Vol. 168. p. 49.
  14. Keith, W. L., Hurdis. D. A. and Abraham, B. M., 1991, "A Comparison of Turbulent Boundary Layer Wall-pressure Spectra," ASME NCA-Vol. 11. FED-Vol. 130, pp. 1-9
  15. Walker, G. J. and Gostelow, J. P., 1990, "Effect of Adverse Pressure Gradients on the Nature and Length of Boundary Layer Transition," ASME J. of Turbomachinery, Vol. 112, pp. 198-205
  16. Bull, M. K. and Thomas, S. W., 1976, "High Frequency Wall Pressure Fluctuations in Turbulent Boundary Layers," Physics of Fluids, Vol. 19, No. 4, pp. 597 -599. https://doi.org/10.1063/1.861496
  17. Blake, W. K., 1986, Mechanics of Flow-induced Sound and Vibration, Academic Press.