Thermo-hydraulic effects of vortex generator pairs in a crossflow channel with a transverse-jet flow
The use ofpassive obstacles to control the hydraulic and thermal behavior of fluids is anapplication in many industrial mechanisms. In this study, flow and thermaloscillation behaviors in a crossflow channel with a transverse jet flow wereinvestigated numerically. Passive vortexgenerator(VG) pairs w...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Sakarya University
2019-10-01
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| Series: | Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/764626 |
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| Summary: | The use ofpassive obstacles to control the hydraulic and thermal behavior of fluids is anapplication in many industrial mechanisms. In this study, flow and thermaloscillation behaviors in a crossflow channel with a transverse jet flow wereinvestigated numerically. Passive vortexgenerator(VG) pairs with different geometric properties were used in the testchannel and their thermo-hydraulic effects in the active mixing zone werediscussed. In addition, nine boundary conditions, whichare the function of velocity and temperature, have been applied to thecomputational domain. The results showedthat VG pairs with different geometric properties do not provide an effectiveimprovement in thermal mixing behavior, but they are very successful in removingthermal oscillations from the channel walls. Momentumand temperature differences between cross flow and jet flow are the secondaryparameters of the study. When the jet velocity was gradually increased bykeeping the crossflow rate constant, improvements in thermal mixing performancewere observed but in this case, it wasalso seen that thermal oscillations reached the channel walls. As the jet temperatureincreased, a decrease in thermal mixing performance was observed due to theincreased hot fluid dominance in the duct. |
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| ISSN: | 2147-835X |