Correction to: Improvement in systematic error in background-oriented schlieren results by using dynamic backgrounds
نویسندگان
چکیده
منابع مشابه
Density measurements using the Background Oriented Schlieren technique
This paper describes the implementation of a novel technique called Background Oriented Schlieren that can produce quantitative visualization of density in a flow. This technique uses only a digital still camera, a structured background, and inverse tomographic algorithms which can extract two-dimensional slices from a three-dimensional flow. This has been applied to obtain the density field fo...
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Two quantitative schlieren methods are assessed and compared: calibrated color schlieren (CCS) and background oriented schlieren (BOS). Both methods are capable of measuring the light deflection angle in two spatial directions, and hence the projected density gradient vector field. Spatial integration using the conjugate gradient method returns the projected density field. To assess the perform...
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Schlieren visualization is one of the simplest ways of determining the geometric parameters of an ultrasonic beam generated by diagnostic transducers, and is recommended for evaluating the potential and the limitations of ultrasonic equipment used in diagnostic applications.’ Apart from some special cases, for example, dynamically focused and/or scanned receiving arrays, the shape of the transm...
متن کاملBackground-oriented schlieren imaging and tomography for rapid measurement of FUS pressure fields: initial results
Background/introduction FUS pressure field mapping is important for dosimetry, quality assurance, and other uses. Hydrophone measurements are the current standard, and are accurate but costly and slow. As a simple low-cost alternative, background-oriented schlieren (BOS) imaging of ultrasound fields has been proposed.[1] In that technique, a predetermined image (usually a grid of lines or a ran...
متن کاملAirborne Application of the Background Oriented Schlieren Technique to a Helicopter in Forward Flight
Blade-tip vortices and their interaction with the helicopter blades play an important role in the generation of noise on rotorcrafts. Full-scale vortex visualization is essential for the understanding of these effects and the validation of sub-scale experiments and numerical simulations. In the present work, the reference-free Background Oriented Schlieren (BOS) method was used to visualize bla...
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ژورنال
عنوان ژورنال: Experiments in Fluids
سال: 2021
ISSN: ['0723-4864', '1432-1114']
DOI: https://doi.org/10.1007/s00348-021-03321-5