在模拟井实验的基础上，通过直接测量方法，对125mm垂直圆管中油水两相流流型进行了重新划分，给出 了垂直圆管中油水两相流流型的过渡边界，建立了用流量法和持水率法判别流型的标准，通过实验发现，小直径管中的流型划分结果不能成比例地应用到大直径管中，而且划分标准或界限也不能按比例放大或缩小。应用混沌分析方法，对油水两相流流动的持水率测量信号进行相空间重构处理，计算出不同流型下的分形维数和关联维数，实现了用混沌方法对两相流流型进行辨识。

Based on wavelet analysis, fractal theory and ECT (Electrical CapacitanceTomography) technique, a soft-sensing system of gas-solid fluidized bed is established, which can implement the on-line identificatin and the monitoring of the flow regime, and also can measure he voidage of the gas-solid fluidized bed. In this system, wavelet analysis and fractal theory are signals. of pressure flucturation; a 12-electrode ECT system is used to display the flow state and calculate the voidage of gas-solid fluidizd bed by suing a novel image reconstruction algorithm. Experimental results show that the soft-sensing system is effective. It can improve the accuracy of identification of flow regime and can measure voidage of gas-solid fluidized bed with an error less than 5%.

A new monitoring system of the flow states of gas-liquid two-phase flow has been developed by using a differential pressure transducer combined with wavelet analysis and fuzzy pattern recognition technique. The differential pressure signal of gas-liquid two-phase flow was obtained under the states of the different flow patterns. including bubble flow. flow, slug flow, plug flow and annular flow. The acquired differential pressure signals were analyzed by the wavelet transform and the eigenvalues were extracted. The flow state of the system was mnitored by fuzzy pattern recognition technique. The experimental results show that the developed system can moinitor flow states of horizontal gas-liquid two-phase folw effectively.

Based on the electrical capatitance tomography tehnique, a voidage measurment system that can implement a voidagedistribution display and voidage measurement of a gas-solid fluidized bed sumultaneously is developed. The back projection algorithm is selected as the image reconstruction algorithm to satisfy the requeiremnt of voidage distribution display. Combining the Tikhnovregularization principle with the ART algorithm. A new quantitiative hybrid image reconstruction algorithm is presented to implement the voidage measurement of a gas-solide fluidized.Experimental results show that the developed measurement sysytem is successful. The speed of image reconstruction of voidage distribution is greater than 20 frames per second. The maximum error of voidage measurement can be less than 5%.