2017 Fiscal Year Final Research Report
Development of tomographic rainbow schlieren for density fields in three-dimensional supersonic jets
| Project/Area Number |
15K05804
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | The University of Kitakyushu |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | シュリーレン法 / 密度計測 / CT / 衝撃波 / 超音速流れ |
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| Outline of Final Research Achievements |
Rainbow schlieren deflectometry combined with the computed tomography have been applied for shock-containing free jets issued from supersonic nozzles with a design Mach number of 1.5 to obtain three-dimensional density fields in the jets with high spatial resolution and accuracy. Two types of nozzle configurations were tried in the present experiment: One is an axisymmetric supersonic nozzle in which the nozzle has 1 mm diameter or 10 mm diameter at the exit. The other is a square supersonic nozzle in which the nozzle has a cross-sectional area of 1 mm x 1mm or 10 mm x 10 mm at the nozzle exit. Experiments have been performed for nozzle pressure ratios to produce shock-containing free jets. Also, jet density fields were soloved using the vortex sheet theory and the RANS equations. As a result, it is shown that the rainbow schlieren deflectometry is a useful tool for studying the three-dimensional structure of shock containing free jets.
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| Free Research Field |
高速気体力学
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