稠密气固两相同轴射流颗粒弥散特性  

Particle dispersion characteristics of dense gas-solids two-phase coaxial jets

作　　者：周华辉[1] 许建良[1] 李伟锋[1] 刘海峰 

机构地区：[1]华东理工大学煤气化教育部重点实验室,上海200237

出　　处：《化工学报》2009年第2期332-337,共6页CIESC Journal

基　　金：国家重点基础研究发展计划项目(2004CB217703);教育部长江学者与创新团队发展计划项目(IRT0620)~~

摘　　要：The particle dispersion characteristics of the dense gas-solids two-phase coaxial jets were investigated with high-speed camera.The results showed that with increasing gas velocity,three particle dispersion modes were observed:shear dispersion,wave dispersion and oscillating dispersion,after the particle flow passed through the intact length.The normalized intact length decreased with increasing gas velocity.For the wave dispersion,the unstable wavelength increased linearly with axial distance at different gas velocities.For the oscillating dispersion,oscillating frequency decreased at first and then increased with increasing gas velocity,so the oscillating frequency had a minimum when the gas velocity was about 65 m·s-1.The particle dispersion characteristics of the dense gas-solids two phase coaxial jets were investigated with high-speed camera. The results showed that with increasing gas velocity, three particle dispersion modes were observed： shear dispersion, wave dispersion and oscillating dispersion, after the particle flow passed through the intact length. The normalized intact length decreased with increasing gas velocity. For the wave dispersion, the unstable wavelength increased linearly with axial distance at different gas velocities. For the oscillating dispersion, oscillating frequency decreased at first and then increased with increasing gas velocity, so the oscillating frequency had a minimum when the gas velocity was about 65 m · s^-1.

关 键 词：稠密气固两相流 未弥散长度 颗粒弥散 同轴射流 

分 类 号：TQ051.01[化学工程] TV131.34[水利工程—水力学及河流动力学]