설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제15권1호
  • /
  • Pages.9-18
  • /
  • 2003
  • /
  • 1229-6422(pISSN)
  • /
  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

천이경계층에서의 간헐도 측정에 관한 실험적 연구

Experimental Study on Measuring the Intermittency in the Transitional Boundary Layer

  • 임효재 (호서대학교 기계공학과) ;
  • 안재용 (한국과학기술원 기계공학과) ;
  • 백성구 (한국과학기술원 기계공학과) ;
  • 정명균 (한국과학기술원 기계공학과)
  • 발행 : 2003.01.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

An experimental study was performed to investigate the turbulence intermittency measuring methods across the boundary layer in the transition region. A single type hot-wire probe was used to measure instantaneous streamwise velocities in laminar, transitional and turbulent boundary layer To estimate wall shear stresses on the flat plate, near wall mean velocities are applied to the principle of CPM. Distribution of intermittency factor is obtained by dual-slope method and compared to the results of four methods,$\'{u},\;\{U}$, TERA and M-TERA method. In these methods, M-TERA shows a good agreement in the near wall region. However, the result of M-TERA method shows that intermittency factor is underestimated in the outer part and outside of the boundary layer and the dimensional constant of M-TERA method should be changed appropriately depending on measuring point.

키워드

참고문헌

  1. ASME, J. of Turbomachinery v.113 The role of laminar-turbulent transition in gas turbine engines Mayle, R.E.
  2. J. Mech. Eng. Sci. v.22 no.5 Natural transition of boundaty layer-the effcts of turbrlence, perssure gradient, and flow history Abu-Ghannam, B.J.;Shaw, R.
  3. ASME Paper No. 92-GT-245 An improved boundary layer transition correlation Fasihfar, A.;Johnson, M.W.
  4. Experimental Thermal and Fluid Science v.3 Investingation of the intermittent behavior of tuansitional boundary layer using a conditional averaging technique Kuan, C.L.;Wang, T.
  5. Turbulent Shear Flows v.4 A computational preston tube method Nitsche, W.;Thunker, R.;Haberland, C.
  6. NACA Report #1247 Characteristics of turbulence in a boundary layer with zoro pressure gradient Klebanoff, P.S.
  7. Fluid Dynamics Research v.24 An envelope method for detection of turbulence intermittency in a transtional boundary layer Chew, Y.T.;Shah, D.A;Wan, J.
  8. Measurement v.3 no.1 Recording and analysis of fluctuation signals using a microcomputer Shaw, R.;Hardcastle, J.A.;Riley, S.;Roberts, C.C
  9. Near-Wall Turbulence, Zoltan Zaric Memorial Conference, Hemisphere The turbulenc burst detection algorithm of Z.Zaric. Falco, R.E.;Gendrich, C.P.;Kline, S.J.(ed.);Afgan, N.H.(ed.)
  10. Experimental Fluids v.19 A proposed intermittency measurement method for transitional boundary layer flows Zang, D.H.;Chew, Y.T.;Winoto, S.H.
  11. KSME B v.22 no.9 Flow characteristics of transitional boundary layer on a flat plate under the influence of freestream turbulent intensity Shin, S.H.;Jeon, W.P.;Kang, S.H.
  12. Boundary Layer Stability and Transition to Turbulence v.14 Experimental study of boundary layer transition on a heated flat plate Sohn, K.H;Reshotko, E.;Zaman, K.B.M.Q.
  13. Proc. 11th Australian Fluid Mechanics Conf. Turbulent intermittency measurement on an axial compressor blade Walker, G.J.;Solomon, W.J.
  14. J. Aero. Sci. v.24 On the distribution of intermittency in the transition region of a boundary layer Narasimha, R.