【摘要】 用热膜探针、自制电位探针和微机控制组成的在线测量系统对底吹过程喷射区的含气率分布及气液上升速度分布进行了模型实验研究。通过大量实验得出了考虑各种喷吹参数的含气率分布模型并应用受力与动量守恒方程导出了气-液上升速度分布模型。该模型能够较好地符合上升初始段及中间段的气泡上升速度。它比全浮力模型前进了一步,但尚不能较好反映近液面处一段的实际情况。更多还原

【Abstract】 The modelling study on the gas hold-up distribut;on and gas-liquid rising velocity distribution in the jet zone of the bottom blown process has been carried out by use of on-line measurement system with hot-film and electric potential probe controlled by a microcomputer. A model for gas hold-up distribution with consideration of various injection parameters has been established through a number of experiments. And a model for gas-liqu(?)d rising velocity distribution has been deduced by use of the force and momentum balance equations. The mathematical model for bubble rising velocity in the initial and middle regions is in good agreement with experimental data. It is better than the buoyace model, but can not reveal the real situation near the surface satisfactorily.更多还原