Development of A New Flow Visualization Technique for External Flows

[qh][1980]提出了一种新的大规模流动结构的流动显示技术，特别适用于湍流涡流。该方法是生成比密度接近统一的可视化流体细丝，然后将其用作示踪剂。关键问题是保持灯丝的相干性和直径。长丝将使用长链聚合物溶液和专门制备的表面活性剂溶液。双曝光照片，定量评价局部流动结构。该方法简单，成本效益高，一旦确定了灯丝的最佳组成，就可以很容易地应用。＊＊＊

9411980 Hoyt A novel flow visualization technique for large scale flow structures, with particular application to turbulent eddy flows, is proposed. The method consists in generating visualizing fluid filaments, of specific density close to unity, and then using them as tracers. The essential issue is maintaining the filament coherence and diameter. Long-chain polymer solutions and specially prepared surfactant solutions will be used for filaments. Dual exposure photographs, with quantitatively evaluate local flow structures. The method is simple, cost effective and can be easily applied once the best composition of the filament has been established. ***