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International Journal of Energetic Materials and Chemical Propulsion

Publication de 6  numéros par an

ISSN Imprimer: 2150-766X

ISSN En ligne: 2150-7678

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.7 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 0.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00016 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.18 SJR: 0.313 SNIP: 0.6 CiteScore™:: 1.6 H-Index: 16

Indexed in

DEVELOPMENT OF LASER DIAGNOSTIC TECHNIQUES FOR FULL-FIELD VELOCITY MEASUREMENTS

Volume 3, Numéro 1-6, 1994, pp. 532-543
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v3.i1-6.540
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RÉSUMÉ

The significance of velocity fields becomes evident in the discussion of heat-transfer measurement techniques in internal combustion engines. In the analysis of convective heat-transfer, local velocity values are of general interest. To obtain a maximum number of valuable data sets of the flow field, the illuminating laser sheet is positioned into the plane of main flow direction. Injected particles following the streamline of the flow become visible when flooded with a laser light during a certain exposure time. The resulting trace pattern is recorded on photographic film for following image analysis procedures. Two methods are presented in order to cover the dynamic range of velocity measurements.
In the case of speckle velocimetry, a Young's fringe processor for speckle photographs is described, which allows measurement of fringe separation and orientation with an estimated accuracy of 1% and 1°, respectively.
We also address the problem of image processing associated with data reduction, data filtering and data evaluation to characterize the flow more in an automatic mode than with manual support. First, the image is enhanced, and a high contrast value assignment by thresholding is performed.
This is followed by image data-analysis procedures which allow determination of the total displacement distance over the whole particle trace image as well as calculation of the flow direction. The acquired data ratio of the particle trace lengths, in combination with the exposure time, determines a two-dimensional vector field plot and gives access to the effective velocity values.

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