Optical diagnosis device used for two-phase flow same-field testing

Abstract

The invention provides an optical diagnosis device used for two-phase flow same-field testing. The optical diagnosis device comprises a high-speed laser device, a high-speed camera, a liquid jet generation device, a fluorescent light tracer particle generation device, a testing region unit and a sequential control device. The high-speed laser device serves as a light source for optical testing of liquid jet and flowing of fluorescent light tracer particles. A lens of the high-speed camera faces one face of the testing region unit. The testing region unit is a region for liquid jet and moving of the fluorescent light tracer particles, and the fluorescent light tracer particles can be evenly distributed in the testing region unit and effectively move along with environment gas in the testing region unit. According to the optical diagnosis device, liquid jet is marked through laser scattered light, environment gas motion is marked through fluorescent light signals of the fluorescent light tracker particles, and therefore two-phase flow separation and same-field testing can be achieved. The testing performance can be achieved just through one laser device and one camera, and therefore the optical diagnosis device is low in cost, simple and easy to use.

Description

technical field [0001] The invention relates to the test of the global flow field, in particular to an optical diagnostic device for the same field test of the two-phase flow. Background technique [0002] The application of PIV (Particle Image Velocimetry) technology realizes the efficient and instantaneous test of the global flow field on the plane, and can effectively analyze the instantaneous motion of the global flow field. The full name of PIV is Particle Image Velocimetry, which is particle image velocity measurement. It uses a sheet light source to perform two imaging in a very short time to record the position of the particle group in the flow field. The relationship is tested by performing a correlation algorithm analysis to calculate the global flow velocity. Currently, this optical measurement technique is widely used in flow-related engineering and research problems. However, the conventional PIV test system is difficult to be used for the relatively complex t...

AI Technical Summary

Problems solved by technology

The above problems can be solved by the LIF-PIV technology based on laser-induced fluorescence technology, but Mie-scattering / LIF-PIV or LIF / LIF-PIV that can test the spray flow field and the ambient gas flow field in the same field are relatively rare. Because these technologies have extremely high requirements on hardware level and optical path layout, etc.

In addition, most of the relevant two-phase flow field technology methods are limited to low-velocity test systems, which cannot meet the practical needs of highly transient direct injection sprays

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