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Experimental Studies on Swirling Flow in a Vertical Circular Tube

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주제분류기계공학

초록

Swirling flows are related to the spiral motion in the tangential direction in addition to the axial and radial direction using several swirl generators. These type of flows are used in combustion chambers to improve flame stability, heat exchanger to enhance heat transfer coefficients, agricultural spraying machines and some vertical pipes to move slurries or transport of materials. However, only a few studies three dimensional velocity profiles in a vertical pipe have been reported. In this present paper, 3dimension particle image velocimetry(PIV) technique was employed to measure the velocity profiles in water along a vertical circular pipe with Reynolds number from 6000 to 13,000. A tangential inlet condition was used as the swirl generator to produce the required flow. The velocities were measured with swirling flow in the water along the test section using the PIV technique.

Abstract

Swirling flows are related to the spiral motion in the tangential direction in addition to the axial and radial direction using several swirl generators. These type of flows are used in combustion chambers to improve flame stability, heat exchanger to enhance heat transfer coefficients, agricultural spraying machines and some vertical pipes to move slurries or transport of materials. However, only a few studies three dimensional velocity profiles in a vertical pipe have been reported. In this present paper, 3dimension particle image velocimetry(PIV) technique was employed to measure the velocity profiles in water along a vertical circular pipe with Reynolds number from 6000 to 13,000. A tangential inlet condition was used as the swirl generator to produce the required flow. The velocities were measured with swirling flow in the water along the test section using the PIV technique.

참고문헌 (9)

  1. John B.Nuttall, "Axial flow in a vortex", NATURE, 172(4378), pp.582~583 (1953)
  2. A. M. Binnie, "Experiments on the flow of swirling water through a pressure nozzle and open trumpet", Quart J. of Mech. And applied Math, X(3), pp.78~89 (1957)
  3. A.M.Binne, "Experiments on the swirling flow of water in a vertical pipe and a bend", AIAA JOURNAL, pp.452~465 (1962)
  4. R.J.K. Wood, "Upstream swirl-induction for reduction of erosion damage from slurries in pipeline bends", Wear, 250, pp.770~778 (2001)
  5. H. Mak, "Near field characteristics of swirling flow past a sudden expansion", Chemical Engineering Science, 62, pp.6726~6746 (2007)
  6. Shyy Woei Chang, "Forced convective flow and heat transfer of upward concurrent air-water slug flow in vertical plain and swirl tubes", Experimental Thermal and Fluid Science, 33, pp.1087~1099 (2009)
  7. Doh, D.H, "3D-PTV measurements of the wake of a sphere", Measurement Science and Technology, 15, pp.1059~1066 (2004)
  8. Soloff, S. M, "Distortion compensation for generalized stereoscopic particle image velocimetry", Measurement Science of Technology, 8(12), pp.1441~1453 (1997)
  9. Kimura, I, "Image processing instrumentation of flowby using correlation technique", Journal of Flow Visualization and Image Processing, 6(22), pp.105~108 (1986)

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