Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지

Wall Pressure Fluctuations of the Boundary Layer Flow at the Nose of and Axisymmetric Body

축대칭 물체 선단에서 발생하는 경계층 내 벽면 변동 압력에 관한 연구

  • Published : 2000.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

When an axisymmetric body moves through air the boundary layer near the stagnation region remains laminar and subsequently it goes through transition to turbulent. The experimental investigation described in this paper concerns the characteristics of wall pressure fluctuations at the initial stage of boundary layer flow including transition. Flush-mounted microphones are used to measure the wall pressure fluctuations at the transition and turbulent boundary layer region of a blunt axisymmetric body in the low noise wind tunnel. It if found from this study that the wall pressure fluctuations in the transition region is higher than that in the turbulent region.

Keywords

References

  1. Proceeding 2nd Int. Symp. on Perf Enhancement for Marine App. v.5 Classical and Nonlinear Analysis of Transitional and Trubulent Boundary Layer Flow Katz,R.A;Galib,T.A.;Cembrola,J.M.
  2. NCA v.5 Studies of Laminar-Turbulent Transition in Air and Water Wall Pressure Fluctuations and Acoustic Emission from the Turbulent Intermittency Perraud,J.C.
  3. Nonlinear Analysis of High-Reynolds-Number over a Buoyant Axisymmetric Body, Physical Review v.49 no.5 Abarbanel,H.D.;Katz,R.A.;Frison,T.W.
  4. J. Acoust. Soc. Am v.28 Wall Pressure Fluctuation in a Turbulent Boundary Layer Willmarth,W.W.
  5. Academic Mechanics of Flow-Induced Sound and Vibration Ⅱ,Ⅱ Blake,W.W.
  6. ASME. Appl. Mech. Rev. v.44 no.12 Hydroacoustics of Transitional Boundary-Layer Flow Lauchle,G.C.
  7. Trans. ASME. J. of Fluids Eng. v.97 A Note on the Transition Observations on an Axisymetric Body and Some Related Fluctuating Wall Pressure Measurement Arakeri,V.H.
  8. Appl. Mech. Rev. v.40 Unsteady Separation on Lifting Surfaces Gal-el-Hak,M.
  9. NWSD-417-980039 저소음 풍동을 이용한 축대칭 몰수체의 유체소음 시험 김재승(외)
  10. NCA. v.15/FED-;168 Wall Pressure Transducer Spatial Resolutions Lueptow,R.M.
  11. J. Fluid Mech v.44 Turbulent Boundary-Layer-Wall-Pressure Fluctuations on Smooth and Rough Walls Blake,W.K.
  12. NAVWEPS Report 8519 Flow Noise Inside Boundary Layers of Buoyancy-Propelled Test Vehicles Nesewanger C. R.;Sperling.F.B.
  13. J. of Fluid Mech. v.148 Pressure Spectra in Turbulent Free Shear Flows Georage,W.K.;Beuther P.D.;R.G.Amdt
  14. Physics of Fluids v.19 no.4 High Frequency Wall Pressure Fluctuations in Turbulent Boundary Layers Bull M. K.;Thomas, S. W.
  15. Engineering Applications of Correlation and Spectral Analysis Bendat,J.S.;Piersol,A.G.(외 2인 편저)