Effects of Particle Size and Injector Geometry on Particle Dynamics

입자크기와 노즐형상이 입자유동특성에 미치는 영향

  • 전운학 (정회원, 국민대학교 기계공학과) ;
  • 김종철 (국민대학교 기계공학과 대학원) ;
  • 황승식 (국민대학교 기계공학과 대학원)
  • Published : 1998.09.01

Abstract

The flow structure of particles for two different injectors has been investigated experimentally by means of a Phase Doppler Particle Analyzer(PDPA). Two injectors used in the present study are the pipe and contraction nozzle. Particles of 0.8${\mu}{\textrm}{m}$, 30${\mu}{\textrm}{m}$, 60 ${\mu}{\textrm}{m}$, and 100${\mu}{\textrm}{m}$ diameter were injected with a constant mass loading ratio of 0.01 and a Reynolds number of 13200. The initial mean velocity and turbulent intensity of particle are strongly influenced by the particle size and the injector geometry. The flow angles of particle at nozzle exit are sensitive to the particle size rather than the injector geometry.

Keywords

References

  1. J.AiAA v.22 Tow-Component LDA measurement in a toe-phase turbulent D. Modarres, H. Tan;S. Elghobashi
  2. J. Heat transfer v.5 Heat transfer to phase wall jet in gassolids two-phase turblulent jet J. Hishida;K. Umemura;M. Maeda
  3. J. Fuid Mech v.186 Simulation of particles in turbulent fluid J.N. Chung;T.R. Troutt
  4. J.AIAA v.32 Particle dispersion in a transitional axisymmetric jet : a numerical simulation J. Uthuppan, S. K. Aggarwal;F.F. Grinstein
  5. 混相流體力學 日本流體學會(ed.)
  6. J.Fluid Mech. v.163 Secondorder modelling of particle dispersion in a turbulent flow T.H. Shih;J.L. Lumley
  7. J.Fluid Mech. v.48 Orderly structure in jet turbulent S.C. Crow;F.H. Champane