Multiple optical measurement techniques have been applied for the investigation of a propeller-wing wind tunnel model. The (half) wind tunnel model is equipped with a nine bladed propeller and its wing has active Coanda blowing over the whole span of the wing. The aim of the investigation is to gain understanding of the flow phenomena, especially the interaction of the periodic propeller slipstream with the Coanda blowing. The optical measurement techniques used are: stereoscopic Particle Image Velocimetry (for investigating the flow field behind the propeller till the end of the wing), mono Particle Image Velocimetry (for the investigation of the Coanda blowing), Background Oriented Schlieren (for investigating the density gradients in the propeller slipstream) and Projected Pattern Correlation (for the blade torsion and deformation). This paper discusses the application of these methods during a single wind tunnel entry in an industrial wind tunnel facility.
作为复杂的高分子,蛋白质存在分子间和分子内的互相作用。这种相互作用会导致蛋白质变性和集聚,并改变蛋白质的粒径
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梅特勒-托利多,METTLER-TOLEDO(纽约证券交易所代码:MTD):世界上首台替代法单盘天平的fa明
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