11.1 Introduction
11.2 Measurement Techniques
11.2.1 Four-Sensor Probe
11.2.2 Electromagnetic Probe
11.3 Experimental Setup
11.4 Results and Discussion
11.4.1 Radial Profiles of Two-Phase Flow Properties
11.4.2 Comparison of Interfacial Area Concentration
11.4.3 Bubble-Induced Turbulence
11.5 Conclusions
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Radial profile of void fraction changes from wall peak to core peak along the flow direction.
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Axial development of the liquid velocity field shows different tendency for the void fraction profiles.
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Existing correlations for interfacial area concentration overestimate interfacial area concentrations at present experimental conditions, which might be attributed to the difference in bubble size. A new correlation should be modeled with further consideration of bubble size and the wall conditions.
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Bubble-induced turbulence at the pipe center in lead–bismuth two-phase flow agrees well with the previous experimental data for air–water flows. However, the mechanism should be clarified by measuring the liquid–metal two-phase flow in a wide range of flow conditions.