Main Catalog Power, Metallurgic and Chemical Engineering Nuclear power plant

The structure of the rising two-phase gas-liquid flow in the natural circulation mode in the inclined passage under the conditions of the significant impact of mass forces

Authors: Martynov D.R.
Published in issue: #9(26)/2018
DOI: 10.18698/2541-8009-2018-9-372
Category: Power, Metallurgic and Chemical Engineering \| Chapter: Nuclear power plant
Keywords: nuclear reactor, hydrodynamics, two-phase flow, natural circulation, inclined passage, flow structure, visualization, PIV (Particle Image Visualization), friction losses
Published: 14.09.2018

The authors have conducted experimental investigation of the rising two-phase flow structure in the natural circulation mode in the inclined passage allowing for the significant impact of mass forces. By means of the PIV-method we have obtained stream patterns of gas-liquid flow, revealed their structure and its peculiar features, recorded the change of modes depending on the volumetric consumption gas content. The results fundamentally describe and visualize the structure of the examined two-phase flow and confirm notable shift of the gas phase to the upper part of the passage, which can result in the emergence of the anisotropy in friction stresses distribution along the cross-section of the passage and, as a consequence, in the change of the integral characteristics of the flow including the pressure losses. The data received can be used for constructing the models applied in thermohydraulic calculations when justifying the safety of modern nuclear power plants projects.

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