Testing device for measuring cold-state flow field in gas burner based on PIV (particle image velocimetry) technique

The invention relates to a testing device for measuring a cold-state flow field in a gas burner based on a PIV (particle image velocimetry) technique. The testing device comprises a heating furnace cold-state model, a gas path system, a trace particle scattering device and a PIV testing system. By integrating the heating furnace cold-state model, the gas path system, the trace particle scattering device and a PIV imaging and image processor, the testing device for measuring the cold-stage flow field in the gas burner based on the PIV technique avoids disturbance of a traditional contact-type measurement means to actual flow, also avoids the defect that the flow field cannot be measured in a large scale through a single-point measurement method, and can test movement characteristics of gas flow generated by the gas burner in a combustion chamber quickly and accurately. The image processor conducts self-correlation and time averaging processing on smog trace particle original images measured through PIV to obtain an average speed vector diagram, and accordingly, the distribution of the flow field is analyzed.