Background-Oriented Schlieren (BOS) for Scramjet Inlet-isolator Investigation
نویسندگان
چکیده
منابع مشابه
Luminescent Measurement Systems for the Investigation of a Scramjet Inlet-Isolator
Scramjets have become a main focus of study for many researchers, due to their application as propulsive devices in hypersonic flight. This entails a detailed understanding of the fluid mechanics involved to be able to design and operate these engines with maximum efficiency even at their off-design conditions. It is the objective of the present cold-flow investigation to study and analyse expe...
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A novel measurement technique based on the refractive index variation in a compressible flow field is presented. This concept is referred to as “Background Oriented Schlieren” (BOS) method in the following. The differences between BOS and other optical techniques which it can best be compared with, will be discussed. Already the first results illustrate an encouraging prospect for the future ap...
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A method is described for measuring the density distribution in an inhomogeneous medium. This method is based upon the classical Schlieren technique, known as Background Oriented Schlieren (BOS) method. The method measures the density dependence of the refractivity through the detection of the deflecting angle of a number of light beams passing through the space to be measured. The results of s...
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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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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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ژورنال
عنوان ژورنال: IOP Conference Series: Materials Science and Engineering
سال: 2018
ISSN: 1757-8981,1757-899X
DOI: 10.1088/1757-899x/370/1/012003