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Thermoacoustic heat engine is a new type of heat engine , has incomparable advantages of traditional heat engine . For example , a simple structure , no moving parts , good stability, long life , pollution, etc. , making it a hot topic in the study of heat engine technology . The recuperator segment is a key component of the thermoacoustic heat engine . The thermal acoustic core regenerator gas parcels mesoscopic thermodynamics microcirculation . With the deepening of the experimental study of the thermoacoustic system , there is an urgent need by means of particle image velocimetry advanced thermal physical testing technology . Mesoscopic measurement of the flow field of the thermoacoustic system there are still many gaps . Micro-PIV ( microscopic particle image velocimetry ) technology is the last century in the the traditional PIV technical basis and developed . The use of modern computer technology, laser technology , and digital image processing technology to break through the limitations of the traditional single-point measurements , to achieve a high-precision , interference - free microfluidic audience observation . This article uses the Micro-PIV system homemade fluorescent tracer particles , transparent regenerator segment model build the thermal acoustic mesoscopic test platform . The full text of the work can be divided into the following aspects : 1 . Reviews in recent years, the thermoacoustic technology research progress and the laser gun the thermoacoustic the preliminary research , summed up in recent years, the study of thermoacoustic technology certain hotspots direction of . Apply to thermoacoustic system mesoscopic measurement research model of tracer particles initially established , on the motion of particles in the the alternating flow field of the thermoacoustic numerical calculation , come to the thermoacoustic system can be used for mesoscopic Measurement tracer particle size range , and quantitative analysis of the impact of the particle size , density , frequency and other parameters of the particles to follow . 3. Homemade fluorescent tracer particles , design and processing stacked recuperator segment model of the transparent plate , and finally Mesoscopic structures thermal acoustic test system , the acquisition and processing of the image of the velocity field , to analyze the flow field within the regenerator . Finally , several improvements found throughout the experiment .
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