منابع مشابه
Krypton tagging velocimetry of an underexpanded jet.
In this work, we present the excitation/emission strategy, experimental setup, and results of an implementation of krypton tagging velocimetry (KTV). KTV is performed as follows: (i) seed a base flow with krypton; (ii) photosynthesize metastable krypton atoms with a frequency-doubled dye laser to form the tagged tracer; (iii) record the translation of the tagged metastable krypton by imaging th...
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We evaluate various molecular tagging velocimetry (MTV) techniques for application in turbulent flows of gases where the smallest length scales must be resolved. We argue that tracer diffusion dictates the use of large complex molecules and discuss a few candidate molecules. The accuracy of MTV is determined by the profile of written lines which widen due to molecular dynamics, including both d...
متن کاملChapter 4 Molecular Tagging Velocimetry and Thermometry
The advent of the laser as a relatively common tool for flow visualization has stimulated the development of velocimetry techniques based on the use of photosensitive molecules. While a variety of different molecules have been employed for this purpose, they share the common attribute that laser excitation is used to produce a defined pattern of long-lived tracers which are embedded within the ...
متن کاملHydroxyl tagging velocimetry in a supersonic flow over a cavity.
Hydroxyl tagging velocimetry (HTV) measurements of velocity were made in a Mach 2 (M 2) flow with a wall cavity. In the HTV method, ArF excimer laser (193 nm) beams pass through a humid gas and dissociate H2O into H + OH to form a tagging grid of OH molecules. In this study, a 7 x 7 grid of hydroxyl (OH) molecules is tracked by planar laser-induced fluorescence. The grid motion over a fixed tim...
متن کاملFlow tagging velocimetry using caged dye photo-activated fluorophores
The use of caged dye photo-activated fluorophore velocimetry is described and representative examples are presented. After a brief survey of recently reported measurements, a more detailed example of the flow produced in a cylinder with a single rotating end wall is presented. Simultaneous stereoscopic image sets in the (r, z) and (r, θ) planes have been obtained over a Reynolds number range of...
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ژورنال
عنوان ژورنال: Experiments in Fluids
سال: 2011
ISSN: 0723-4864,1432-1114
DOI: 10.1007/s00348-011-1058-6