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《Journal of Chemical Industry and Engineering(China)》 1999-06
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IDENTIFICATION OF FLOW REGIMES IN VERTICAL UPWARD STEAM - WATER TWO PHASE FLOW USING DIFFERENTIAL PRESSURE FLUCTUATIONS

Bai Bofeng, Guo Liejin and Zhao Liang( State Key Laboratory of Multiphase Flow in Power Engineering, Xi' an Jiaotong University, Xi' an 710049)  
The characteristics of differential pressure fluctuations in vertical upward steam - water two ?phase flow under the condition of high temperature and high pressure are studied by using the signal process technique. The fluctuations are analyzed by using the methods of time domain and frequency domain, which is a power spectrum density (PSD) function.The features of the curves of the power spectrum versus frequency are categorized as two kinds. The feature of the power spectrum density function is extracted by means of the Root Mean Square (RMS), from which an objective flow regime indicator is developed. The experimental result agrees well with the flow regime map proposed by McQuillan Whal-ley under the pressure of 3.0 MPa. Future studies are required to improve the accuracy of identification.
【Fund】: 国家杰出青年科学基金资助项目(No.59725616)
【CateGory Index】: TQ021.1
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