대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제24권2호
  • /
  • Pages.288-297
  • /
  • 2000
  • /
  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

와동간의 상호작용이 경계층 및 열전달에 미치는 영향에 관한 연구 ( I ) - Common flow down에 관하여 -

An Experimental Study on the Effects of the Boundary Layer and Heat Transfer by Vortex Interactions ( I ) - On the common flow down -

  • 홍철현 ((주) 대우정밀, 기술연구소) ;
  • 양장식 (부산대학교 기계공학부 및 기계기술연구소) ;
  • 이기백 (부산대학교 기계공학부 및 기계기술연구소)
  • 발행 : 2000.02.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This paper describes the results of an experimental investigation of the flow characteristics and the heat transfer rate on a surface by interaction of a pair of vortices. The test facility consists of a boundary-layer wind tunnel with a vortex introduced into the flow by half-delta wings(vortex generators) protruding from the surface. In order to control the strength of the two longitudinal vortices, the angles of attack of the vortex generators are varied from 20 degree to 45 degree, but spacings between the vortex generators are fixed to 4 cm. The 3-dimensional mean velocity downstream of the vortex generators is measured by a five-hole pressure probe, and the hue-capturing method using the thermochromatic liquid crystals has been used to provide the local distribution of the heat transfer coefficient. By using the method mentioned above, the following conclusions are obtained from the present experiment. The boundary layer is thinned in the regions where the secondary flow is directed toward the wall and thickened where it is directed away from the wall. The peak augmentation of the local heat transfer coefficient occurs in the downwash region near the point of minimum boundary-layer thickness. Streamwise distributions of averaged Stanton number on the measurement planes show very similar trends for all the cases(${\beta}=20^{circ},\;30^{\circ}\;and\;45^{\circ}$).

키워드

참고문헌

  1. Wendt, B. J. and Hingst, W. R., 1994, 'Flow Structure in the Wake of a Wishbone Vortex Generator,' AIAA Journal, Vol. 32, No. 11, pp. 2234-2240
  2. Deb, P., Biswas, G., and Mitra, N. K., 1995, 'Heat Transfer and Flow Structure in Laminar and Turbulent Flows in a Rectangular Channel with Longitudinal Vortices,' International Journal of Heat and Mass Transfer, Vol. 38, No. 13, pp. 2427-2444 https://doi.org/10.1016/0017-9310(94)00357-2
  3. Pauley, W. R. and Eaton, J. K., 1988, 'Experimental Study of the Development of Longitudinal Vortex Pairs Embedded in a Turbulent Boundary Layer,' AIAA Journal Vol. 26, No. 7, pp. 816-823
  4. Wendt, B. J., Grebert, I., and Hingst, W. R., 1993, 'Structure and Development of Streamwise Vortex Arrays Embedded in a Turbulent Boundary Layer,' AIAA Journal, Vol. 31, No. 2, pp. 319-325
  5. Reichert, B. A. and Wendt, B. J., 1993, 'An Experimental Investigation off S-Duct Flow Control Using Arrays of Low Profile Vortex Generations,' AIAA Paper 93-0019
  6. Eibeck, P. A. and Eaton, J. K., 1987, 'Heat Transfer Effects of a Longitudinal Vortex Embedded in a Turbulent Boundary layer,' ASME Journal of Heat Transfer, Vol. 109, pp. 16-24
  7. Fiebig, M., 1997, 'Vortices and Heat Transfer,' Zeitschrift fur Angewandte Mathematik und Mechanik, Vol. 77, No. 1., pp. 3-18 https://doi.org/10.1002/zamm.19970770103
  8. Zhu, J. X., Fiebig, M., and Mitra, N. K., 1995, 'Numeracal Investigation of Turbulent Flows and Heat Transfer in a Rib-Roughened Channel with Longitudinal Vortex Generators,' International Journal of Heat and Mass Transfer, Vol. 38, No. 3, pp. 495-501 https://doi.org/10.1016/0017-9310(94)00177-W
  9. Camci, C., Kim K., Hippensteele, S. A., and Pointsatti, P. E., 1993, 'Evaluation of a Hue Capturing Based Transient Liquid Crystal Method for High-Resolution Mapping of Convective Heat Transfer on Curved Surfaces,' ASME Journal of Heat Transfer, Vol. 115, pp. 311-318
  10. Akino, N., Kunugi, T., Ichimiya, K. Mitsushiro, K., and Usda, M. 1989, 'Improved Liquid-Crystal Thermometry Excluding Human Color Sensation,' ASME Journal of Heat Transfer, Vol. 111, pp. 558-565
  11. Hippensteele, S. A., Russell, L. M. and Torres, F. J., 1985, 'Local Heat Transfer Measurements on a Large Scale-Model Turbine Blade Airfoil Using A Composite of a Heat Element and Liquid Crystals,' ASME Journal of Engineering for Gas Turbines and Power, Vol. 107, pp. 953-960
  12. 양장식, 나종문, 이기백, 1995, '선형 터빈 케스케이드 끝벽의 열전달 특성에 관한 연구,' 대한기계학회, 제19권, 제9호, pp. 2386-2398
  13. 윤정환, 도덕희, 이상준, 1996, 'TLC와 컬러 화상처리를 이용한 Hele_Shaw Cell내부 대류 온도장 측정,' 대한기계학회논문집(B), 제20권, 제3호, pp. 1114-1122
  14. 이기백, 김태영, 양장식, 1997, '색상포착기법과 수치 계산을 이용한 3차원 밀폐 공간 내의 자연 대류 연구,' 대한기계학회논문집(B), 제21권, 제12호, pp. 1595-1607
  15. 이기백, 양장식, 1995, 'Cubic Spline 보간법을 이용한 5공 프로브의 보정과 그응용,' 한국항공우주공학회지, 제 23권, 제 2호, pp. 61-68
  16. 한동주, 1999, '종방향 와동쌍의 상호작용과 유동특성에 관한 연구,' 부산대학교 석사학위논문
  17. Westphal, F. V., Pauley, W. R., and Eaton, J. K., 1987, 'Interaction Between a Vortex and a Turbulent Boundary Layer-Part 1: Mean Flow Evolution and Turbulence Properties,' NASA TM 88361
  18. Holman, J. P., 1984, Experimental Methods for Engineers, McGrew-Hill
  19. Abernethy, R. B., Benedict, R. P., and Dowdell, R. B., 1985, 'ASME Measurement Uncertainty,' ASME Journal of Fluids Engineering, Vol. 107, pp. 161-164