The present report is devoted to the analysis of the thermophysical properties of supercritical water in the cores of supercritical water-cooled reactors (SCWR) and results of the experiments with multi-rod bundles cooled with supercritical fluid (mainly – water) flows carried out in different countries. The most important results and specific heat transfer regimes observed in the experiments were summarized. On the basis of the experimental data analysis the design of a thermophysical test facility for full-scale experiments for the determination of the heat and mass exchange regimes and supercritical water hydraulic parameters in multi-rod bundles was elaborated. The need for the experimental data for the proper description of the said processes was stated, and the importance of obtaining them was underlined. The list of the controlled parameters and experiments was created.
The paper is concerned with a prospective method of qualitative and qualitative diagnostic technique – multi colored particle image velocimetry. The method proposed relies on illuminating of the studied flow by three laser planes with different wavelengths. The advantages of applying the technique in practice to investigate various flows have described. An efficiency verification of multi colored particle image velocimetry method to study vortex structures has been conducted. An experimental setup has assembled and an algorithm of the recorde images processing procedure has been developed. To assess the quality of MPIV measurements the experimental images have been compared with the computer model.
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