Numerical Study on the Forced Gas-Particle Two-Phase Jets

• Main Authors: Jia-Jhih Liang, 梁家智
• Other Authors: Chen-I Hung
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/31734485202556703327

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 94 === 　This paper simulates the gas-particle two-phase single jet by the vortex method. And we put emphasis on the relation between particles and large-scale coherent structure. First, numerical simulation in the gas phase almost resembles those experiments. Then the two-phase numerical simulation displays that the motion of small particle is closely connected to large-scale vortex dynamics and we could found small particles in the central region of coherent structures. But large particles only appeared around the suburb of coherent structures. And the particles move closer to the central region of coherent structures in the lower Reynolds number. In the other hand, they move closer to the suburb of coherent structures in the higher Reynolds number. If the fluid flow is affected by particles, coherent structures would take particles to move hardly. However, the fluctuation near the outlet of the jet would increase greatly if the jet is forced by a high frequency. But the dispersion of particles in the forced jet is almost the same as in the free jet.