中文摘要：

在直径为0．476m的椭圆底搅拌槽中，采用半椭圆管盘式涡轮桨，研究桨径与槽径LLD／T变化（分别为0．28，0．33，0．4及0．5）对气液两相体系中临界分散、通气功率和气含率的影响．结果表明，对于D／T较小的搅拌桨，采用由载气到气泛测得的泛点比气泛到载气测得的泛点明显滞后，但随D／T增大泛点滞后现象消失；在相同通气量下，D／T对相对功率需求俨函）的影响不大；功率消耗相同时，低通气量时气含率随D／T增大略有增大，但高通气量时恰好相反．研究结果及泛点、通气功率、气含率关联式对工业气液搅拌反应器设计操作具有参考价值．

英文摘要：

The influences of impeller diameter （0.28T, 0.33T, 0.40Tand 0.57） on critical impeller speed for gas dispersion, gassed power consumption and gas holdup were studied in a 0.476 m i.d. stirred tank with dished base agitated by a hollow-blade disk turbine. The results show that the flooding transitions measured from loading to flooding （L-F） and from flooding to loading （F-L） by means of increasing and falling gas rates show a hysteresis for low D/T, which becomes indistinct with the increase of D/T. At certain gas rates, D/T has no effect on relative power demand （RPD, the ratio of gassed power to ungassed power）. For given power consumption, gas holdup increases slightly with increasing D/T at low gas rate, whereas it decreases apparently at high gas rate. The results and the correlations are of particular relevance to the design and operation of sparged gas-liquid stirred reactors.