Nuclear Engineering and Technology

  • 제38권8호
  • /
  • Pages.763-778
  • /
  • 2006
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
권호 표지

INVESTIGATION OF DRAG REDUCTION MECHANISM BY MICROBUBBLE INJECTION WITHIN A CHANNEL BOUNDARY LAYER USING PARTICLE TRACKING VELOCIMETRY

  • Hassan Yassin A. (Department of Nuclear Engineering Texas A&M University College Station) ;
  • Gutierrez-Torres C.C. (Department of Nuclear Engineering Texas A&M University College Station)
  • 발행 : 2006.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Injection of microbubbles within the turbulent boundary layer has been investigated for several years as a method to achieve drag reduction. However, the physical mechanism of this phenomenon is not yet fully understood. Experiments in a channel flow for single phase (water) and two phase (water and microbubbles) flows with various void fraction values are studied for a Reynolds number of 5128 based on the half height of the channel and bulk velocity. The state-of-the art Particle Tracking Velocimetry (PTV) measurement technique is used to measure the instantaneous full-field velocity components. Comparisons between turbulent statistical quantities with various values of local void fraction are presented to elucidate the influence of the microbubbles presence within the boundary layer. A decrease in the Reynolds stress distribution and turbulence production is obtained with the increase of microbubble concentration. The results obtained indicate a decorrelation of the streamwise and normal fluctuating velocities when microbubbles are injected within the boundary layer.

키워드

참고문헌

  1. McCormick ME; Bhattacharyya R (1973) Drag Reduction of a Submersible Hull by Electrolysis. Naval Engineers Journal 11-16
  2. Madavan NK; Merkle C.L; Deutsch, S (1985) Numerical Investigations into the Mechanisms of Microbubble Drag Reduction. Journal of Fluids Engineering 107: 370-377 https://doi.org/10.1115/1.3242495
  3. Merkle CL; Deutsch S (1989) Microbubble Drag Reduction. Frontiers in Experimental Fluid Mechanics Ced. M. Lecture Notes in Engineering 46: 291-335
  4. Moriguchi Y; Kato H (2002) Influence of microbubble diameter and distribution on fractional resistance reduction. Journal of Marine Science and Technology 7: 79-85 https://doi.org/10.1007/s007730200015
  5. Xu J; Maxey MR; Karniadakis GE (2002) Numerical simulation of turbulent drag reduction using micro-bubbles. Journal of Fluid Mechanics. 468:271-281 https://doi.org/10.1017/S0022112002001659
  6. Kawamura T; Moriguchi Y; Kato H; Kakugawa A; Kodama Y (2003) Effect of bubble size on the microbubble drag reduction of a turbulent boundary layer, 4th ASME-JSME Joint Fluid Engineering Conference, FEDSM-45645
  7. Guin MM; Kato H; Yamaguchi H; Maeda M; Miyanaga M (1996) Reduction of Skin Friction by Microbubbles and its Relation with Near-Wall Bubble Concentration in a Channel. Journal of Marine Science and Technology 1: 241-254 https://doi.org/10.1007/BF02390723
  8. Jimenez J; Pinelli A (1999) The Autonomous Cycle of Near-Wall Turbulence. J. Fluid Mech 389: 335-359 https://doi.org/10.1017/S0022112099005066
  9. Kanai A; Miyata H (2001) Direct numerical simulation of wall turbulent flows with microbubbles. International Journal for Numerical Methods in Fluids 35:593-615 https://doi.org/10.1002/1097-0363(20010315)35:5<593::AID-FLD105>3.0.CO;2-U
  10. Warholic MD; Heist DK; Katcher M; Hanratty T J (2001) A study with particle-image velocimetry of the influence of drag-reducing polymers on the structure of turbulence. Experiments in fluids. 31: 474-483 https://doi.org/10.1007/s003480100288
  11. Yamamoto Y; Uemura, T; & Kadota, S (2002) Accelerated super-resolution PIV based on successive abandonment method. In Proceedings of 11th International Symposium on Applications of Laser Techniques to Fluid Mechanics
  12. Hassan Y A; Blanchat T K; Seeley Jr C H (1992) Simultaneous velocity measurements of both components of a two-phase flow using particle image velocimetry. Int J. of Multiphase Flow 18: 371-395 https://doi.org/10.1016/0301-9322(92)90023-A
  13. Warholic MD (1997) Modification of turbulent channel flow by passive and additive devices. Ph.D. thesis, University of Illinois
  14. Antonia, RA; Teitel, M; Kim, J; Browne, LW; (1992) Low-Reynolds-number effects in a fully developed turbulent channel flow. J. Fluid Mech. 236: 579-605 https://doi.org/10.1017/S002211209200154X
  15. Warholic, MD; Massah H; Hanratty, TJ (1999) Influence of drag-reducing polmers on turbulence: effects of Reynolds number, concentration and mixing. Experiments in fluids. 27:461-472 https://doi.org/10.1007/s003480050371
  16. Fischer, M.; Jovanovic, J; Durst, F; (2001). Reynolds number effects in the near-wall region of turbulent channel flows. Physics of Fluids 13: 1775-1767 https://doi.org/10.1063/1.1367369
  17. Virk PS (1975) Drag reduction fundamentals. AIChE Journal. 21: 625-656 https://doi.org/10.1002/aic.690210402
  18. Wei T; Willmarth WW (1992) Modifying turbulent structure with drag-reducing polymer additives in turbulent channel flows. J. Fluid Mech. 245:619-641 https://doi.org/10.1017/S0022112092000600
  19. Vlachogiannis M; Hanratty TJ (2004) Influence of wavy structured surfaces and large scale polymer structures on drag reduction. Experiments in Fluids. 36: 685-700 https://doi.org/10.1007/s00348-003-0745-3
  20. Sreenivasan KR (1988) A unified view of the origin and morphology of the turbulent boundary layer structure in turbulence management and relaminarisation. 37-61. eds Liepmann HW and Narasimha. Springer-Verlag, Berlin
  21. Panton R L (1996) Incompressible Flow. John Wiley and Sons, Inc.
  22. Lesieur M (1990) Turbulence in Fluids. Kluwer Academic Publishers
  23. Vukoslavcecic P; Wallas JM; Balint J (1991) The Velocity and Vorticity Fields of a Turbulent Boundary Layer, part 1. Simultaneous Measurements by Hot-Wire Anemometry. Journal of Fluid Mechanics. 228:25-51 https://doi.org/10.1017/S0022112091002628
  24. Meng JCS (1998) Wall Layer Microturbulence Phenomenological Model and Semi-Markov Probability Predictive Model for Active Control of Turbulent Boundary Layers. AIAA No. 98-2995
  25. Bernard PS; Wallace JM; (2002) Turbulent Flow. Analysis Measurement, and Prediction. John Wiley and Sons, Inc.