Visualized flow field and temperature field coupling measurement experiment system

Abstract

The invention provides a visualized flow field and temperature field coupling measurement experiment system. With the visualized flow field and temperature field coupling measurement experiment systemof the invention adopted, the visual measurement of the characteristics of a flow field and temperature field in a complex mechanical structure under different experimental conditions can be simultaneously realized. According to the system of the invention, laser induced fluorescence (LIF) and particle image velocimetry (PIV) are combined to construct a reasonable optical path system; a series ofoptical components such as a beam splitter and a narrow pass filter are adopted to perform wave division processing on light wave signals; a synchronizer is adopted to control a high-speed camera toperform synchronous shooting, so that the synchronous acquisition of the temperature distribution and flow characteristic parameters of a complex flow field in a visualization experiment body can berealized; a modular loop design is adopted, each sub-loop is independent of each other, and therefore, the reliability of the experimental system is high; and whole-field real-time synchronous measurement can be performed on physical parameters in the complex flow field, and an actual flow field will not be disturbed during a measurement process. The system is suitable for the study of the flow characteristics of various complex flow fields.

Description

technical field [0001] The invention belongs to the field of fluid mechanics experiments, and in particular relates to a coupling measurement experiment system for a visualized flow field and a temperature field. Background technique [0002] With the increasing demand for energy, the development and application of nuclear energy has been paid more and more attention. In the nuclear power system, the nuclear main pump, as the core component of the whole system, is responsible for the circulation of the coolant in the drive circuit to export the core heat. The performance of its operation directly determines the safety and economy of the entire nuclear power system. Therefore, the optimization of the nuclear main pump is of great significance. However, the operating performance of the main pump depends to a large extent on the flow of its internal working medium. It is of great significance to improve the operating safety and economical efficiency of nuclear power systems. ...

AI Technical Summary

Problems solved by technology

Therefore, it is very difficult to accurately obtain the internal flow field information.

Traditional measurement methods usually arrange sensing elements (direction probes, pressure sensing elements, etc.) inside the flow field to collect corresponding flow field information. , It is difficult to realize the shortcomings of full-field measurement, and the flow of the flow field will be disturbed during the measurement process, which seriously affects the accuracy of the experimental measurement

In addition to traditional experimental methods, numerical calculation is also a widely used analytical method, which has the advantages of convenience, speed, and low cost. However, the results need to be verified by accurate experimental data. Therefore, it is necessary to design an experimental measurement system that can overcome numerical simulation. The lack of accuracy of the results can avoid the current situation of traditional measurement methods disturbing the flow field

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