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横向气流穿过垂直下落液滴场的二维流动数值计算
引用本文:薛社生,徐明,束小建.横向气流穿过垂直下落液滴场的二维流动数值计算[J].计算力学学报,2011,28(1):102-107.
作者姓名:薛社生  徐明  束小建
作者单位:北京应用物理与计算数学研究所,北京,100088
基金项目:中国工程物理研究院发展基金(2007B09007)资助项目.
摘    要:对Cl2/He混合气体横向穿过垂直下落的BHP(按重量25%的KOH,25%的H2O2及50%的H2O)液滴场的化学反应流动作了数值计算.模拟的流场是气体/液滴两相流场,在气相方程中,考虑了液滴与Cl2反应产生及释放O2(1Δ)的质量源项及表示液滴对气流阻碍作用的动量源项.由于气相动量小,液滴在下落过程横向偏移小,下落...

关 键 词:气体/液滴两相流动  化学反应  SIMPLE方法
收稿时间:2009/5/26 0:00:00
修稿时间:2010/3/18 0:00:00

2D numerical computation of transverse gaseous flow into a falling drop-field
XUE She-sheng,XU Ming and SHU Xiao-jian.2D numerical computation of transverse gaseous flow into a falling drop-field[J].Chinese Journal of Computational Mechanics,2011,28(1):102-107.
Authors:XUE She-sheng  XU Ming and SHU Xiao-jian
Institution:Institute of Applied Physics and Computational Mathematics,Beijing 100088,China;Institute of Applied Physics and Computational Mathematics,Beijing 100088,China;Institute of Applied Physics and Computational Mathematics,Beijing 100088,China
Abstract:Numerical computation of Cl2/He gases flow transverse traveling into falling BHP ( basic hydrogen peroxide)drops field with chemical reaction was carried out. Modeled flow was a gas/drop two-phase flow, and gas-phase equation was established in which both of the mass source term, describing drops/chlorine reaction and the generation and release of singlet oxygen, and the momentum source term, describing the drag on gas flow from liquid drops, was considered.Because the gaseous momentum was small, the transverse offset of a falling liquid drop was less and its velocity was basically invariable,therefore an assumption could be made that the number density of droplets in the fluid field was uniform.An analysis formula of gaseous mass source term was obtained based on laminar boundary layer theory. This formula indicated the relation between the chlorine flux cross the surface of a liquid drop and the concentration of chlorine in hybrid gases, and the velocity of inflow gases. To solve the gaseous model equations, the SIMPLE scheme was used. Modeled results showed that, a vortex generated on the site near the top and the right boundary of the drop-filled region.The density of hybrid gases decreased in drop-filled region, and the chlorine utility, the singlet oxygen decreased with increasment of inflow velocity. These results agreed well with the experimental tests provided in relevant reference.
Keywords:gas/drop two-phase flows  chemical reaction  SIMPLE scheme
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