Thermal Structure of Turbulent Stagnating Opposed Jets with Different Temperature
Fluctuating temperature has been measured using a laser Rayleigh scattering technique along a centerline of turbulent stagnating opposed jets (cold jet velocity : 2m/s) with different temperatures up to about 400°C. The temperature signals show that the temperature fluctuation is characterized by sp...
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Published in | Nihon Kikai Gakkai rombunshuu. B hen Vol. 63; no. 615; pp. 3634 - 3640 |
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Main Authors | , , , |
Format | Journal Article |
Language | Japanese |
Published |
The Japan Society of Mechanical Engineers
25.11.1997
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Subjects | |
Online Access | Get full text |
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Summary: | Fluctuating temperature has been measured using a laser Rayleigh scattering technique along a centerline of turbulent stagnating opposed jets (cold jet velocity : 2m/s) with different temperatures up to about 400°C. The temperature signals show that the temperature fluctuation is characterized by spike type fluctuations with a sharp increase or decrease in temperature between hot and cold jets. This indicates that the temperature fluctuation is mainly attributed to the large-scale fluctuations of the boundary between the hot and cold jets. Profiles of mean temperature and rms value of fluctuating temperature can be normalized using a similarity parameter based on the bulk strain rate, characteristic intensity and scale of the turbulence when the temperature difference is less than 200°C. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0387-5016 1884-8346 |
DOI: | 10.1299/kikaib.63.3634 |