关键词: 气升式振荡环流反应器, 数值模拟, 气含率, 传质系数, 气升式振荡环流反应器, 数值模拟, 气含率, 传质系数

Abstract: As a novel airlift loop reactor，Airlift Reversible Loop Reactor (ARLR) has been proved effectively increasing the gas holdup and mass transfer coefficient in fermentation experiments. By using computational fluid dynamics (CFD) simulation and experimental validation，the mass transfer characteristics of ARLR were studied. Through CFD simulation and response surface analysis，the structural parameters such as H/D ratio，draft tube diameter and draft tube height were optimized. Compared with traditional ALR，by using this novel reactor，the gas holdup increases 32% at least，and the oxygen mass transfer coefficient also increases more than 11%，under the same ventilation conditions. The results indicated that the ARLR has a very broad prospect in high aerobic microorganism cultivation.

Key words: Airlift Reversible Loop Reactor, CFD simulation, Gas holdup, Mass transfer coefficient, airlift reversible loop reactor (ARLR), CFD simulation, gas holdup, mass transfer coefficient