Study on Droplet Entrainment of High-Viscosity Falling Liquid Film

Journal of Fluid Science and Technology

Jun INUMARU¹  Maromu OHTAKA¹  Hiroaki WATANABE¹ 

[1] Central Research Institute of Electric Power Industry;

关键词: gas-liquid two-phase flow;    liquid droplet;    wave;    high-viscosity;    gasifier;    slagging;   

DOI  :  10.1299/jfst.5.169

来源: DOAJ

【 摘 要 】

An experimental study of counter-current annular two-phase flow of high-viscosity liquid and air in a large diameter pipe was carried out to investigate the inception criterion for entrainment of molten slag droplet in an entrained flow coal gasifier. Liquid film thickness was measured using a high-speed camera for 4 types of liquid with various viscosities and surface tensions. It was clearly shown that the measured average wave amplitude had a good correlation with the gas Reynolds number, and that the predicted critical gas velocity for droplet inception using new formula of wave amplitude had a good agreement with the experimental results under the condition of very low fluid Reynolds number( Ref ≤10). The critical Weber number Wec =1.73 was obtained as inception criterion of droplet entrainment.

【 授权许可】

Unknown