Numerical analysis of a microjet-based method for active flow control in convergent-divergent nozzles with a sudden expansion duct
A method based on microjets is implemented to control the flow properties in a convergent-divergent nozzle undergoing a sudden expansion. Three different variants of this active control technique are explored numerically by means of a finite-volume method for compressible fluid flow: with the first...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | en |
| Published: |
Tech Science Press
2022
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/98287/7/98287_Numerical%20analysis%20of%20a%20microjet-based%20method.pdf http://irep.iium.edu.my/98287/ https://www.techscience.com/fdmp/online/detail/18688/pdf https://www.techscience.com/fdmp/online/detail/18688 |
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| Summary: | A method based on microjets is implemented to control the flow properties in a convergent-divergent nozzle undergoing a sudden expansion. Three different variants of this active control technique are explored numerically by means of a finite-volume method for compressible fluid flow: with the first one, the control is implemented at the base, with the second at the wall, while the third one may be regarded as a combination of the other two variants. When the jets are over-expanded, the control is not very effective. However, when a favorable pressure
gradient is established at the nozzle, the control becomes effective, leading to an increase in the base pressure. |
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