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
Ship laboratory has specific components for underwater
multi EA 4000 集多个检测模块于一身,可用来检测固体,液体,粘稠性物体中的硫,碳,氯含量,由于它
本理论解释了动态和静态接触角的概念及其区别,并通过不同的测量方法:光学和力学接触角检测来分析评价两种接触角测
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许多世界的制药公司几十年来已经在使用Novasina公司的仪器用于测量他们的粉剂及片剂的水活度,这样做的的主
麦奇克在测量打印机的颜料悬浮液微粒粒径方面已经建立了一套成熟的标准方法在高浓度进行测量以免稀释对分散产生影响
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The isotope ratio of each of the light elements preser