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

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Measurement of Outward Turbulent Flows Subject to Plane Rate of Strain in a Rotating 90 Deg. Curved Duct of Variable Cross-Section

단순변형률 조건 하의 회전하는 가변단면 $90^{\circ}$ 곡덕트내 외향 난류유동 측정

  • Published : 2000.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

Hot-wire measurements were carried out on the developing turbulent flows subject to plane rate of strain in a rotating curved duct. The cross-section of the curved duct varies from 100mm${\times}$50mm rectangular shape at the bend inlet gradually to the 50mm${\times}$100mm rectangular shape at the bend outlet. Experimental setup consists of the test section of $90^{\circ}$ curved duct, rotating disc of 1.95m diameter, Ag-Ni precision slip ring, automatic traversing mechanism, variable speed motor, centrifugal blower, orifice flowmeter and hot-wire anemometer. Data signals from the rotating curved duct are transmitted through the slip ring to the computer which is located at the outside of the rotating disc. 3-dimensional velocity and 6 Reynold stresses components were obtained from the fluctuating and mean voltage measured by the slant type hot-wire probe rotating into 6 orientations. We investigate the effects of Coriolis and centrifugal forces on the turbulence structure.

Keywords

References

  1. 이건휘, 1992, '회전하는 정사각단면의 $90{\circ}$ 곡판내 난류유동 특성에 관한 연구,' 고려대학교, 기계공학과 기계공학과 박사학위 논문
  2. Choi, Y. D., An, J. S. and Kim, W. K., 1998, 'Numerical Analysis of Turbulent Flow in a Rotating $90^{\circ}$ Rectangular Bend of Variable Coss Section' Advances in Turbulence Research-1998. pp. 103-119
  3. 정곤진, 1998, '회전하는 가변단면 $90^{\circ}$ 곡덕트내의 난류유동 특성에 관한 실험적 연구,' 고려대학교 기계공학과 석사학위논문
  4. 오창민, 1999, '단순변형률 조건하의 가변단면 $90^{\circ}$ 곡덕트 내의 발달하는 난류유동 측정,' 고려대학교 기계공학과 석사학위논문
  5. B. E. Launder, G. J. Reece, and W. Rodi, 'Progress in the development of a Reynolds stress turbulence model,' J. of Fluid Mech., 68,537-566 (1975) https://doi.org/10.1017/S0022112075001814
  6. Hanjalic, K, and Launder, B. E., 1976, 'Contribution Towards a Reynold-Stress Closure for Low-Reynolds-Number Turbulence, J. Fluid Mech., Vol. 74, part 4 https://doi.org/10.1017/S0022112076001961
  7. King, L. V., 1914, 'On the Convection of Heat from Small Cylinders in a Stream of Fluid, with Applications to Hot-Wire Anemometry,' Philos, Trans. Roy. Soc. London, Vol. 214, No. 14, pp. 373
  8. Jorgensen, F. E., 1971, 'Directional Sensitivity of Wire and Hot-film Probes,' DlSA INFO., No. 11
  9. Dvorak, K. and Syred, N., 1972, 'The Statistical Analysis of Hot-wire Anemometer Signals in Complex Flow Fields,' DISA Conference, Univ. of Leicester
  10. ASME Performance Test Codes 1987, 'Measurement Test Codes Supervisory Committed of ASME