Publicou 4 edições por ano
ISSN Imprimir: 1065-3090
ISSN On-line: 1940-4336
Indexed in
STRUCTURE OF UNDEREXPANDED SUPERSONIC JETS FROM AXISYMMETRIC LAVAL NOZZLES
RESUMO
The rainbow schlieren deflectometry is combined with the computed tomography to obtain three-dimensional density fields of a shock-containing free jet issued from a Laval nozzle with a design Mach number of 1.5. Experiments have been performed at a nozzle operating pressure ratio of 4.0, where the nozzle is operated at a slightly underexpanded condition. Multidirectional rainbow schlieren pictures of the jet can be acquired by rotating the nozzle about its longitudinal axis in equal angular intervals and the three-dimensional density fields are reconstructed by two types of image analyses for experimental data. One is a data processing procedure based on the Abel inversion algorithm, and the other is that with the convolution back-projection algorithm. It is found that excellent quantitative agreement is reached between the jet three-dimensional density fields reconstructed from both algorithms. The present rainbow schlieren technique is found to be significantly effective to examine a fine shock-cell structure of the shock-containing jet and makes it possible to provide experimental data with high accuracy and reliability on the jet density field.
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Maeda Shinnosuke, Nakao Shinichiro, Miyazato Yoshiaki, Three-dimensional fine structure of shock-containing free jets from supersonic square nozzles, AIAA Scitech 2019 Forum, 2019. Crossref
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Ezoe Masatoshi, Nakao Shinichiro, Miyazato Yoshiaki, Quantitative Flow Visualization by Rainbow Schlieren Deflectometry and Pitot Pressure Measurements for Leek Peeler Nozzle Jets, Journal of Flow Control, Measurement & Visualization, 07, 01, 2019. Crossref
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Sugawara Sotaro, Nakao Shinichiro, Miyazato Yoshiaki, Ishino Yojiro, Miki Kenji, Quantitative Flow Visualization of Slightly Underexpanded Microjets by Mach–Zehnder Interferometers, Flow, Turbulence and Combustion, 106, 3, 2021. Crossref
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Fukunaga Ryota, Ezoe Masatoshi, Nakao Shinichiro, Miyazato Yoshiaki, Application of rainbow schlieren tomography for shock-containing rectangular jets, Journal of Visualization, 25, 4, 2022. Crossref
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Takeshita T., Fukunaga R., Nakao S., Miyazato Y., Miki K., Quantitative flow diagnostics of shock trains by rainbow schlieren deflectometry, The Aeronautical Journal, 2022. Crossref
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Kriparaj K. G., Roy V. Paul, Tide P. S., Biju N., AN EXPERIMENTAL STUDY ON SHOCK CELL STRUCTURES OF UNDEREXPANDED JETS FROM CORRUGATED LOBED NOZZLES USING THE SCHLIEREN IMAGING TECHNIQUE , Journal of Flow Visualization and Image Processing, 29, 4, 2022. Crossref