Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Dynamic Characteristics of an Unsteady Flow Through a Vortex Tube

  • Kim, Chang-Soo (School of Mechanical Engineering, Kyungpook National University) ;
  • Sohn, Chang-Hyun (School of Mechanical Engineering, Kyungpook National University)
  • Published : 2006.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

Dynamic flow characteristics of a counter-flow vortex tube is investigated using hot-wire and piezoelectric transducer (PZT) measurements. The experimental study is conducted over a range of cold air outlet ratios (Y=0.3, 0.5, 0.7, and 1.0) and inlet pressure 0.15 MPa. Temperatures are measured at the cold air outlet and along the vortex tube wall. Hot-wire is located at cold outlet and PZT is installed at inner vortex tube by mounting at throttle valve. The cold outlet temperature results show that the swirl flow of vortex tube is not axisymmetric. The hot-wire and PZT results show that there exist two distinct kinds of frequency, low frequency periodic fluctuations and high frequency periodic fluctuations. It is found that the low frequency fluctuation is consistent with the Helmholtz frequency and the high frequency fluctuation is strongly related with precession oscillation.

Keywords

References

  1. ？Ahlborn, B. and Groves, S., 1997, 'Secondary Flow in a Vortex Tube,' Fluid Dynamics Research, Vol. 21, pp. 73-86 https://doi.org/10.1016/S0169-5983(97)00003-8
  2. Arbuzov, V. A., 1997, 'Observation of Large-？Scale Hydrodynamic Structures in a Vortex Tube and Ranque Effect,' Tech. Phys. Lett., Vol. 23, pp. 938-940 https://doi.org/10.1134/1.1261939
  3. Hartnett, J. P., Eckert, E. G. R., 1957, 'Experimental Study of the Velocity and Temperature Distribution in a High Velocity Vortex-Type Flow,' Trans. ASME, Vol. 79, pp. 751-758
  4. Hilsch, R., 1947, 'The Use of Expansion of Gases in a Centrifugal Field as a Cooling Process,' Review of Scientific Instruments, Vol. 8, No. 2, pp. 108-113 https://doi.org/10.1063/1.1740893
  5. Kassner, R. and Knoernschild, E., 1948, 'Fric tion Laws and Energy Transfer in Circular Flow,' U.S.A.F. Air Material Command, Wright-Patterson AFB, Proj. No. LP-259, TR. F-TR-2198ND, GS-USAF, AF Base No. 78
  6. Kinsler, L. E., Frey, A. R., Coppens, A. B. and Sanders, J. V., 2000, 'Fundamentals of Acoustics 4th Edition,' John Wiley & Sons, Inc., New York, pp. 272-296
  7. Lukachev, S. V., 1981, 'Unstable Gas Flow Modes in a Ranque Vortex Tube,' J. of Eng. Physics., Vol. 41, No. 5, pp. 1171-1175
  8. Ranque, G. J., 1932, 'United State Patent,' Applied December 6. Serial No. 646
  9. Richards, B. E., 1977, 'Measurement of Unsteady Fluid Dynamics Phenomena,' Von Karman Institute for Fluid Dynamics, Hemisphere publishing corporation
  10. Schlenz, D., 1982, 'Kompressible Strahlgetriebene Drallstrohmung in rotations symme-trischen,' Ph.D. Thesis, University of Erlangen, Kanalen
  11. Sohn, C. H., Kim, C. S. and Gowda, B. H. L., 2006, 'Experimental and Numerical studies in a Vortex Tube,' Journal of Mechanical Science and Technology (KSME Int J.), Vol. 20, No. 3, pp. 418-425 https://doi.org/10.1007/BF02917525