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이중원관의 혼합 유동특성에 관한 실험적 연구

An Experimental Study on the Mixing Flow Characteristics of Double Coaxial Jet

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참고문헌

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주제분류기계공학

초록

The flow acting on a confined jet flow can be represented as a conventional turbulence flow with its complex phase and characteristics. This is still effectively applied in a variety of industries, for example in ejectors. In this study coaxial confined model made of transparent acrylic pipe and driving water nozzle in order to figure out of recirculation flow near the wall of pipe and prove how flow in the pipe can be developed. It was revealed that length of the recirculation flow adjacent to wall of pipe was characterized to be larger when Reynolds Number is getting bigger.

Abstract

The flow acting on a confined jet flow can be represented as a conventional turbulence flow with its complex phase and characteristics. This is still effectively applied in a variety of industries, for example in ejectors. In this study coaxial confined model made of transparent acrylic pipe and driving water nozzle in order to figure out of recirculation flow near the wall of pipe and prove how flow in the pipe can be developed. It was revealed that length of the recirculation flow adjacent to wall of pipe was characterized to be larger when Reynolds Number is getting bigger.

참고문헌 (9)

  1. I. S. Jang, "Development of Contact Freezer with Ejector", J. of Korean Soc. of Mechanical Technology, 3(2), pp.121~128 (2001)
  2. I. S. Jang, "Development of vacuum cooling system using water-air ejector", J. of Korean Soc. of Mechanical Technology, 6(1), pp.175~180 (2004)
  3. 안국찬, "액비제조용 이젝터 성능해석", 한국기계기술학회지, 15(6), pp.919~924 (2013), 한국기계기술학회
  4. 김원현, "동축제트의 와류주파수 및 혼합특성에 대한 수치해석", 한국전산유체공학회지, 14(3), pp.49~55 (2009), 한국전산유체공학회
  5. H. S. Jeon, "Numerical Study for the Prediction of the Spray Flow in Confined Jets", J. of KSAS, 25(2), pp.62~72 (1997)
  6. Forstall, W. Jr, "Momentum and Mass Transfer in Coaxial Gas Jets", Transaction of the ASME., 72(4), pp.399~408 (1950)
  7. Curtet, R., "On the Tendency to Self Preservation in Axisymmetric Ducted Jets", Journal of Basic Engineering, 86(4), pp.765~776 (1964)
  8. Becker, H.A., "Mixing and flow in ducted turbulent jets", pp.7~20 (1933), Academic Press
  9. Won-Hyun Kim, "Numerical study on the characteristics of vortex frequency and laminar mixing of a passive scalar in coaxial jet flows", Master, Department of Mechanical Engineering, pp.2008

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