关键词: 超细分级机；导流片；气固两相流；RNG k-&epsilon, 湍流模型

Abstract: The numerical simulation of gas-solid two phase flow field was performed for the improved feeding pipe of superfine classifier SCX based on the two-phase flow theory. The distribution regularities of gas-solid two-phase flow in the feeding pipe were obtained by analyzing the distribution of the pressure，velocity，turbulent kinetic energy of the gas phase，and the particle concentration distribution of the solid phase. Numerical results show that the radial gradient of the pressure，velocity and turbulent kinetic energy of the gas phase reduce，and the channel flow phenomena weakened by installing guide vanes. Guide vanes can impede the lateral movement of solid particles and change the particle trajectory，thus particle concentration distributions are evenly distributed，facilitating the subsequent classification.

Key words: superfine classifier；guide vanes；gas-solid two-phase flow；RNG k-&epsilon, turbulent mode