NUMERICAL SIMULATION OF PERFORATION GEOMETRY IN A RECTANGULAR TABBED JET CONTROL
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| Formato: | Recurso digital |
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2018
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| _version_ | 1866901605176049664 |
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| author | R. S. Pradeep Kumar*, Dilip. A. Shah** & Sunil. R. Gangolli*** |
| author_facet | R. S. Pradeep Kumar*, Dilip. A. Shah** & Sunil. R. Gangolli*** |
| contents | <p>This paper deals with the optimization of tab perforation to enhance the mixing characteristics of subsonic and correctly expanded sonic axi-symmetric jets issuing from a convergent nozzle. Passive jet control technique involves a set of tabs at the nozzle exit producing a pair of counter-rotating vortices, which can offer considerable reduction of potential core length as well as the noise reduction. Measurements of centerline axial velocity decay and radial velocity distribution were carried out. The effect of various perforation geometries such as Circular, Triangular and Regular Hexagonal cross sections of 2 mm equivalent diameter in the tab are analyzed. In this paper a three dimensional numerical simulation of jet flow with perforated geometries are performed using the FLUENT software. The potential core length for perforation tab at Mach numbers of 0.4, 0.8 and correctly expanded sonic conditions are estimated. The centre line velocity of the jet is found to decay at a faster rate in the case of Hexagonal perforation geometry as compared to other geometries.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_16419280 |
| institution | Zenodo |
| language | |
| publishDate | 2018 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | NUMERICAL SIMULATION OF PERFORATION GEOMETRY IN A RECTANGULAR TABBED JET CONTROL R. S. Pradeep Kumar*, Dilip. A. Shah** & Sunil. R. Gangolli*** <p>This paper deals with the optimization of tab perforation to enhance the mixing characteristics of subsonic and correctly expanded sonic axi-symmetric jets issuing from a convergent nozzle. Passive jet control technique involves a set of tabs at the nozzle exit producing a pair of counter-rotating vortices, which can offer considerable reduction of potential core length as well as the noise reduction. Measurements of centerline axial velocity decay and radial velocity distribution were carried out. The effect of various perforation geometries such as Circular, Triangular and Regular Hexagonal cross sections of 2 mm equivalent diameter in the tab are analyzed. In this paper a three dimensional numerical simulation of jet flow with perforated geometries are performed using the FLUENT software. The potential core length for perforation tab at Mach numbers of 0.4, 0.8 and correctly expanded sonic conditions are estimated. The centre line velocity of the jet is found to decay at a faster rate in the case of Hexagonal perforation geometry as compared to other geometries.</p> |
| title | NUMERICAL SIMULATION OF PERFORATION GEOMETRY IN A RECTANGULAR TABBED JET CONTROL |
| url | https://doi.org/10.5281/zenodo.16419280 |