Flow field-temperature field synchronous measurement system under narrow rectangular channel blocking condition

Abstract

The invention provides a flow field-temperature field synchronous measurement system under a narrow rectangular channel blocking condition, which comprises a 1-3 mm narrow rectangular channel formed by a heating plate and a visual PC endurance plate, a buffer chamber, an upper bearing plate, a middle bearing plate and a lower bearing plate of the fixed narrow rectangular channel, a laser incidentwindow, a spectroscope, an optical filter, a laser, a high-speed camera, a synchronizer, an acquisition system and the like, wherein blocking objects with different sizes and shapes are arranged at different positions of the narrow rectangular channel through silica gel, so that the blocking working condition in a reactor is simulated. A Particle Image Velocimetry (PIV) technology and a Laser Induced Fluorescence (LIF) technology are adopted to measure a flow field and a temperature field, three laser incident windows are arranged on two sides of the middle bearing plate for laser irradiation,the synchronizer is used for controlling two high-speed cameras, a visualization section is divided into three areas under the action of the spectroscope and the optical filter to carry out synchronous shooting of the flow field and the temperature field, and the acquisition system records experimental data of the flow field and the temperature field in real time. The flow field-temperature fieldsynchronous measurement system under the narrow rectangular channel blocking condition is simple and feasible, and has low cost and wide range of research working conditions.

Description

technical field [0001] The invention relates to a flow field-temperature field synchronous measurement system under the condition of narrow rectangular channel blockage, in particular to a flow field-temperature field synchronous measurement system under the condition of narrow rectangular channel blockage, which is applied to the internal flow of narrow channel under different flow conditions The research on the characteristics of field and temperature field distribution mainly involves engineering technology fields such as fluid mechanics, heat transfer, and nuclear safety. Background technique [0002] Plate-shaped fuel elements are widely used in power reactors and high-flux research reactors due to their advantages of compact structure, low fuel core temperature, high burnup and high heat transfer efficiency. The plate-shaped core coolant passage is a narrow rectangular passage, and is usually a closed passage, and the passages are not connected to each other. Under ce...

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Problems solved by technology

At present, most of the analysis methods use self-programming and 3D simulation software, but the results need to be verified by accurate experimental data. Therefore, it is necessary to design an experiment for simultaneous measurement of flow field and temperature field distribution under the condition of narrow rectangular channel blockage system

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