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在航空发动机燃烧室中,燃油是在经过喷嘴雾化之后,以液雾的形式进入的,因此,液雾的特性也决定了燃烧的质量,而液雾的特性是由喷嘴的雾化性能来决定的。通过运用PIV(particle image velocimetry)和GSV(global sizing velocimetry)这两种激光测试技术,对喷嘴喷雾场进行了试验研究。试验结果表明:在一定压力范围内,喷雾锥角随压力的变大而变大;在较大压力下,喷雾场会形成空心锥体结构;在一个压力确定的喷雾场中,边缘区域的雾化效果最好。通过对试验数据的分析处理,可以检测喷嘴的雾化性能。
In the aero-engine combustion chamber, the fuel is introduced as a liquid mist after being atomized by the nozzle. Therefore, the characteristics of the liquid mist also determine the quality of the combustion. The characteristics of the liquid mist are determined by the atomization performance of the nozzle decided. Through the use of PIV (particle image velocimetry) and GSV (global sizing velocimetry) laser testing of the two technologies, nozzle spray field were studied. The experimental results show that the spray cone angle increases with the increase of pressure in a certain pressure range. At larger pressure, the spray cone will form a hollow cone structure. In a pressure-confined spray field, the fog of the edge region The best effect. Through the experimental data analysis and processing, you can detect the nozzle atomization performance.